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hcsalmon1-Chess-Engine-Test/Java/Perft.java
Coding with Tom 55c3acf98e Add files via upload
2025-01-12 22:42:08 +00:00

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import java.math.BigInteger;
public class Perft
{
static Boolean OutOfBounds(int move) {
if (move < 0) {
return true;
}
if (move > 63) {
return true;
}
return false;
}
static void PrintMoveNoNL(int starting, int target_square, int tag) { //starting
// Print starting
if (OutOfBounds(starting)) {
System.out.printf("%d", starting);
} else {
System.out.printf("%c%c", GenConst.SQ_CHAR_X[starting], GenConst.SQ_CHAR_Y[starting]);
}
// Print target
if (OutOfBounds(target_square)) {
System.out.printf("%d", target_square);
} else {
System.out.printf("%c%c", GenConst.SQ_CHAR_X[target_square], GenConst.SQ_CHAR_Y[target_square]);
}
// Print promotion tag
switch (tag) {
case GenConst.TAG_BCaptureKnightPromotion:
case GenConst.TAG_BKnightPromotion:
case GenConst.TAG_WKnightPromotion:
case GenConst.TAG_WCaptureKnightPromotion:
System.out.printf("n");
break;
case GenConst.TAG_BCaptureRookPromotion:
case GenConst.TAG_BRookPromotion:
case GenConst.TAG_WRookPromotion:
case GenConst.TAG_WCaptureRookPromotion:
System.out.printf("r");
break;
case GenConst.TAG_BCaptureBishopPromotion:
case GenConst.TAG_BBishopPromotion:
case GenConst.TAG_WBishopPromotion:
case GenConst.TAG_WCaptureBishopPromotion:
System.out.printf("b");
break;
case GenConst.TAG_BCaptureQueenPromotion:
case GenConst.TAG_BQueenPromotion:
case GenConst.TAG_WQueenPromotion:
case GenConst.TAG_WCaptureQueenPromotion:
System.out.printf("q");
break;
default:
break;
}
}
static final int MOVE_STARTING = 0;
static final int MOVE_TARGET = 1;
static final int MOVE_PIECE = 2;
static final int MOVE_TAG = 3;
static final int NO_SQUARE = 64;
static final int WKS_CASTLE_RIGHTS = 0;
static final int WQS_CASTLE_RIGHTS = 1;
static final int BKS_CASTLE_RIGHTS = 2;
static final int BQS_CASTLE_RIGHTS = 3;
static final int PINNED_SQUARE_INDEX = 0;
static final int PINNING_PIECE_INDEX = 1;
static final BigInteger WKS_EMPTY_BITBOARD = new BigInteger("6917529027641081856");
static final BigInteger WQS_EMPTY_BITBOARD = new BigInteger("1008806316530991104");
static final BigInteger BKS_EMPTY_BITBOARD = new BigInteger("96");
static final BigInteger BQS_EMPTY_BITBOARD = new BigInteger("14");
static final BigInteger RANK_1_BITBOARD = new BigInteger( "18374686479671623680");
static final BigInteger RANK_2_BITBOARD =new BigInteger( "71776119061217280");
static final BigInteger RANK_3_BITBOARD =new BigInteger( "280375465082880");
static final BigInteger RANK_4_BITBOARD =new BigInteger( "1095216660480");
static final BigInteger RANK_5_BITBOARD =new BigInteger( "4278190080");
static final BigInteger RANK_6_BITBOARD =new BigInteger( "16711680");
static final BigInteger RANK_7_BITBOARD =new BigInteger( "65280");
static final BigInteger RANK_8_BITBOARD =new BigInteger( "255");
static final BigInteger MAX_ULONG = new BigInteger("18446744073709551615");
static final BigInteger MAGIC = new BigInteger("285870213051386505");
static final int[] DEBRUIJN64 =
{
0, 47, 1, 56, 48, 27, 2, 60,
57, 49, 41, 37, 28, 16, 3, 61,
54, 58, 35, 52, 50, 42, 21, 44,
38, 32, 29, 23, 17, 11, 4, 62,
46, 55, 26, 59, 40, 36, 15, 53,
34, 51, 20, 43, 31, 22, 10, 45,
25, 39, 14, 33, 19, 30, 9, 24,
13, 18, 8, 12, 7, 6, 5, 63
};
static int BitScanForward(BigInteger bitboard) {
for (int i = 0; i < 64; i++) {
if (bitboard.testBit(i)) {
return i;
}
}
throw new AssertionError("Bitscanforward: bit not found");
//BigInteger xorResult = bitboard.xor(bitboard.subtract(BigInteger.ONE));
//BigInteger multiplied = xorResult.multiply(MAGIC);
//int index = multiplied.shiftRight(58).intValue();
//return DEBRUIJN64[index];
}
static boolean isNotZero(BigInteger bitboard) {
return bitboard.signum() != 0;
}
static boolean isZero(BigInteger bitboard) {
return bitboard.signum() == 0;
}
static BigInteger removeBit(BigInteger bitboard) {
return bitboard.and(bitboard.subtract(BigInteger.ONE));
}
static void printMoveInfo(int startingSquare, int targetSquare, int tag, int piece)
{
Pr.println("\n Move Info:");
Pr.print(" Starting Square: ");
Pr.printInt(startingSquare);
Pr.print(" ");
Pr.printSquareLn(startingSquare);
Pr.print(" Target Square: ");
Pr.printInt(targetSquare);
Pr.print(" ");
Pr.printSquareLn(targetSquare);
Pr.print(" Tag: ");
Pr.printIntLn(tag);
Pr.print(" Piece: ");
Pr.printIntLn(piece);
}
static int makeMove(int piece, int tag, int startingSquare, int targetSquare)
{
Pr.println("___make move____ piece: " + piece + " tag: " + tag + " startingSquare: " + startingSquare + " targetSquare: " + targetSquare);
assert piece >= GenConst.WP && piece <= GenConst.BK : "invalid piece: " + piece;
assert startingSquare >= 0 && startingSquare < 64 : "invalid starting square: " + startingSquare;
assert targetSquare >= 0 && targetSquare < 64 : "invalid target square: " + targetSquare;
// printMoveInfo(startingSquare, targetSquare, tag, piece);
int captureIndex = -1;
Board.is_white_global = !Board.is_white_global;
switch (tag)
{
case GenConst.TAG_NONE: //none
case GenConst.TAG_CHECK: //check
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
break;
case GenConst.TAG_CAPTURE: //capture
case GenConst.TAG_CHECK_CAPTURE: //check cap
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
if (piece >= GenConst.WP && piece <= GenConst.WK)
{
for (int i = GenConst.BP; i <= GenConst.BK; ++i)
{
if (targetSquare == 47) {
Pr.println(" board array: " + Board.bitboard_array_global[i]);
}
if (isNotZero((Board.bitboard_array_global[i].and(MoveConstants.SQUARE_BBS[targetSquare]))))
{
captureIndex = i;
break;
}
}
assert captureIndex >= 0 && captureIndex <= 11 : "invalid capture index, capture";
if (captureIndex < 0 || captureIndex > 11)
{
Pr.println("Invalid capture index: " + captureIndex);
}
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].and(MoveConstants.SQUARE_BBS[targetSquare].not());
}
else //is black
{
for (int i = GenConst.WP; i <= GenConst.WK; ++i)
{
if (isNotZero((Board.bitboard_array_global[i].and(MoveConstants.SQUARE_BBS[targetSquare]))))
{
captureIndex = i;
break;
}
}
assert captureIndex >= 0 && captureIndex <= 11 : "invalid capture index, capture";
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].and(MoveConstants.SQUARE_BBS[targetSquare].not());
}
Board.ep = NO_SQUARE;
break;
case GenConst.TAG_WHITEEP: //white ep
//move piece
Board.bitboard_array_global[GenConst.WP] =Board.bitboard_array_global[GenConst.WP].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[GenConst.WP] =Board.bitboard_array_global[GenConst.WP].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.bitboard_array_global[GenConst.BP] =Board.bitboard_array_global[GenConst.BP].and(MoveConstants.SQUARE_BBS[targetSquare + 8].not());
Board.ep = NO_SQUARE;
break;
case GenConst.TAG_BLACKEP: //black ep
Board.bitboard_array_global[GenConst.BP] =Board.bitboard_array_global[GenConst.BP].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[GenConst.BP] =Board.bitboard_array_global[GenConst.BP].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.bitboard_array_global[GenConst.WP] =Board.bitboard_array_global[GenConst.WP].and(MoveConstants.SQUARE_BBS[targetSquare - 8].not());
Board.ep = NO_SQUARE;
break;
case GenConst.TAG_WCASTLEKS: //WKS
//white king
Board.bitboard_array_global[GenConst.WK] =Board.bitboard_array_global[GenConst.WK].or(MoveConstants.SQUARE_BBS[GenConst.G1]);
Board.bitboard_array_global[GenConst.WK] =Board.bitboard_array_global[GenConst.WK].and(MoveConstants.SQUARE_BBS[GenConst.E1].not());
Board.bitboard_array_global[GenConst.WR] =Board.bitboard_array_global[GenConst.WR].or(MoveConstants.SQUARE_BBS[GenConst.F1]);
Board.bitboard_array_global[GenConst.WR] =Board.bitboard_array_global[GenConst.WR].and(MoveConstants.SQUARE_BBS[GenConst.H1].not());
Board.castle_rights_global[WKS_CASTLE_RIGHTS] = false;
Board.castle_rights_global[WQS_CASTLE_RIGHTS] = false;
Board.ep = NO_SQUARE;
break;
case GenConst.TAG_WCASTLEQS: //WQS
Board.bitboard_array_global[GenConst.WK] =Board.bitboard_array_global[GenConst.WK].or(MoveConstants.SQUARE_BBS[GenConst.C1]);
Board.bitboard_array_global[GenConst.WK] =Board.bitboard_array_global[GenConst.WK].and(MoveConstants.SQUARE_BBS[GenConst.E1].not());
Board.bitboard_array_global[GenConst.WR] =Board.bitboard_array_global[GenConst.WR].or(MoveConstants.SQUARE_BBS[GenConst.D1]);
Board.bitboard_array_global[GenConst.WR] =Board.bitboard_array_global[GenConst.WR].and(MoveConstants.SQUARE_BBS[GenConst.A1].not());
Board.castle_rights_global[WKS_CASTLE_RIGHTS] = false;
Board.castle_rights_global[WQS_CASTLE_RIGHTS] = false;
Board.ep = NO_SQUARE;
break;
case GenConst.TAG_BCASTLEKS: //BKS
Board.bitboard_array_global[GenConst.BK] =Board.bitboard_array_global[GenConst.BK].or(MoveConstants.SQUARE_BBS[GenConst.G8]);
Board.bitboard_array_global[GenConst.BK] =Board.bitboard_array_global[GenConst.BK].and(MoveConstants.SQUARE_BBS[GenConst.E8].not());
Board.bitboard_array_global[GenConst.BR] =Board.bitboard_array_global[GenConst.BR].or(MoveConstants.SQUARE_BBS[GenConst.F8]);
Board.bitboard_array_global[GenConst.BR] =Board.bitboard_array_global[GenConst.BR].and(MoveConstants.SQUARE_BBS[GenConst.H8].not());
Board.castle_rights_global[BKS_CASTLE_RIGHTS] = false;
Board.castle_rights_global[BQS_CASTLE_RIGHTS] = false;
Board.ep = NO_SQUARE;
break;
case GenConst.TAG_BCASTLEQS: //BQS
Board.bitboard_array_global[GenConst.BK] =Board.bitboard_array_global[GenConst.BK].or(MoveConstants.SQUARE_BBS[GenConst.C8]);
Board.bitboard_array_global[GenConst.BK] =Board.bitboard_array_global[GenConst.BK].and(MoveConstants.SQUARE_BBS[GenConst.E8].not());
Board.bitboard_array_global[GenConst.BR] =Board.bitboard_array_global[GenConst.BR].or(MoveConstants.SQUARE_BBS[GenConst.D8]);
Board.bitboard_array_global[GenConst.BR] =Board.bitboard_array_global[GenConst.BR].and(MoveConstants.SQUARE_BBS[GenConst.A8].not());
Board.castle_rights_global[BKS_CASTLE_RIGHTS] = false;
Board.castle_rights_global[BQS_CASTLE_RIGHTS] = false;
Board.ep = NO_SQUARE;
break;
case GenConst.TAG_BKnightPromotion: //BNPr
Board.bitboard_array_global[GenConst.BN] =Board.bitboard_array_global[GenConst.BN].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
break;
case GenConst.TAG_BBishopPromotion: //BBPr
Board.bitboard_array_global[GenConst.BB] =Board.bitboard_array_global[GenConst.BB].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
break;
case GenConst.TAG_BQueenPromotion: //BQPr
Board.bitboard_array_global[GenConst.BQ] =Board.bitboard_array_global[GenConst.BQ].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
break;
case GenConst.TAG_BRookPromotion: //BRPr
Board.bitboard_array_global[GenConst.BR] =Board.bitboard_array_global[GenConst.BR].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
break;
case 12: //WNPr
Board.bitboard_array_global[GenConst.WN] =Board.bitboard_array_global[GenConst.WN].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
break;
case 13: //WBPr
Board.bitboard_array_global[GenConst.WB] =Board.bitboard_array_global[GenConst.WB].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
break;
case 14: //WQPr
Board.bitboard_array_global[GenConst.WQ] =Board.bitboard_array_global[GenConst.WQ].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
break;
case 15: //WRPr
Board.bitboard_array_global[GenConst.WR] =Board.bitboard_array_global[GenConst.WR].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
break;
case 16: //BNPrCAP
Board.bitboard_array_global[GenConst.BN] =Board.bitboard_array_global[GenConst.BN].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
for (int i = GenConst.WP; i <= GenConst.WK; ++i)
{
if (isNotZero((Board.bitboard_array_global[i].and(MoveConstants.SQUARE_BBS[targetSquare]))))
{
captureIndex = i;
break;
}
}
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case 17: //BBPrCAP
Board.bitboard_array_global[GenConst.BB] =Board.bitboard_array_global[GenConst.BB].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
for (int i = GenConst.WP; i <= GenConst.WK; ++i)
{
if (isNotZero((Board.bitboard_array_global[i].and(MoveConstants.SQUARE_BBS[targetSquare]))))
{
captureIndex = i;
break;
}
}
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case 18: //BQPrCAP
Board.bitboard_array_global[GenConst.BQ] =Board.bitboard_array_global[GenConst.BQ].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
for (int i = GenConst.WP; i <= GenConst.WK; ++i)
{
if (isNotZero((Board.bitboard_array_global[i].and(MoveConstants.SQUARE_BBS[targetSquare]))))
{
captureIndex = i;
break;
}
}
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case 19: //BRPrCAP
Board.bitboard_array_global[GenConst.BR] =Board.bitboard_array_global[GenConst.BR].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
for (int i = GenConst.WP; i <= GenConst.WK; ++i)
{
if (isNotZero((Board.bitboard_array_global[i].and(MoveConstants.SQUARE_BBS[targetSquare]))))
{
captureIndex = i;
break;
}
}
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case 20: //WNPrCAP
Board.bitboard_array_global[GenConst.WN] =Board.bitboard_array_global[GenConst.WN].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
for (int i = GenConst.BP; i <= GenConst.BK; ++i)
{
if (isNotZero((Board.bitboard_array_global[i].and(MoveConstants.SQUARE_BBS[targetSquare]))))
{
captureIndex = i;
break;
}
}
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case 21: //WBPrCAP
Board.bitboard_array_global[GenConst.WB] =Board.bitboard_array_global[GenConst.WB].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
for (int i = GenConst.BP; i <= GenConst.BK; ++i)
{
if (isNotZero((Board.bitboard_array_global[i].and(MoveConstants.SQUARE_BBS[targetSquare]))))
{
captureIndex = i;
break;
}
}
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case 22: //WQPrCAP
Board.bitboard_array_global[GenConst.WQ] =Board.bitboard_array_global[GenConst.WQ].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
for (int i = GenConst.BP; i <= GenConst.BK; ++i)
{
if (isNotZero((Board.bitboard_array_global[i].and(MoveConstants.SQUARE_BBS[targetSquare]))))
{
captureIndex = i;
break;
}
}
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case 23: //WRPrCAP
Board.bitboard_array_global[GenConst.WR] =Board.bitboard_array_global[GenConst.WR].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
for (int i = GenConst.BP; i <= GenConst.BK; i++)
{
if (isNotZero((Board.bitboard_array_global[i].and(MoveConstants.SQUARE_BBS[targetSquare]))))
{
captureIndex = i;
break;
}
}
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case 24: //WDouble
Board.bitboard_array_global[GenConst.WP] =Board.bitboard_array_global[GenConst.WP].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[GenConst.WP] =Board.bitboard_array_global[GenConst.WP].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = targetSquare + 8;
break;
case 25: //BDouble
Board.bitboard_array_global[GenConst.BP] =Board.bitboard_array_global[GenConst.BP].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[GenConst.BP] =Board.bitboard_array_global[GenConst.BP].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = targetSquare - 8;
break;
}
if (piece == GenConst.WK)
{
Board.castle_rights_global[WKS_CASTLE_RIGHTS] = false;
Board.castle_rights_global[WQS_CASTLE_RIGHTS] = false;
}
else if (piece == GenConst.BK)
{
Board.castle_rights_global[BKS_CASTLE_RIGHTS] = false;
Board.castle_rights_global[BQS_CASTLE_RIGHTS] = false;
}
else if (piece == GenConst.WR)
{
if (Board.castle_rights_global[WKS_CASTLE_RIGHTS] == true)
{
if (isZero((Board.bitboard_array_global[GenConst.WR].and(MoveConstants.SQUARE_BBS[GenConst.H1]))))
{
Board.castle_rights_global[WKS_CASTLE_RIGHTS] = false;
}
}
if (Board.castle_rights_global[WQS_CASTLE_RIGHTS] == true)
{
if (isZero((Board.bitboard_array_global[GenConst.WR].and(MoveConstants.SQUARE_BBS[GenConst.A1]))))
{
Board.castle_rights_global[WQS_CASTLE_RIGHTS] = false;
}
}
}
else if (piece == GenConst.BR)
{
if (Board.castle_rights_global[BKS_CASTLE_RIGHTS] == true)
{
if (isZero((Board.bitboard_array_global[GenConst.BR].and(MoveConstants.SQUARE_BBS[GenConst.H8]))))
{
Board.castle_rights_global[BKS_CASTLE_RIGHTS] = false;
}
}
if (Board.castle_rights_global[BQS_CASTLE_RIGHTS] == true)
{
if (isZero((Board.bitboard_array_global[GenConst.BR].and(MoveConstants.SQUARE_BBS[GenConst.A8]))))
{
Board.castle_rights_global[BQS_CASTLE_RIGHTS] = false;
}
}
}
return captureIndex;
}
static void unmakeMove(int piece, int tag, int startingSquare, int targetSquare, int captureIndex)
{
Pr.println("___unmake move____ piece: " + piece + " tag: " + tag + " startingSquare: " + startingSquare + " targetSquare: " + targetSquare + " captureIndex: " + captureIndex);
Board.is_white_global = !Board.is_white_global;
switch (tag)
{
case GenConst.TAG_NONE: //none
case GenConst.TAG_CHECK: //check
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case GenConst.TAG_CAPTURE: //capture
case GenConst.TAG_CHECK_CAPTURE: //check cap
assert captureIndex != -1 : "invalid capture index";
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[targetSquare].not());
Pr.println("bp capture before: " + Board.bitboard_array_global[GenConst.BP]);
Board.bitboard_array_global[captureIndex] = Board.bitboard_array_global[captureIndex].or(MoveConstants.SQUARE_BBS[targetSquare]);
Pr.println("bp capture after: " + Board.bitboard_array_global[GenConst.BP]);
break;
case GenConst.TAG_WHITEEP: //white ep
//move piece
Board.bitboard_array_global[GenConst.WP] =Board.bitboard_array_global[GenConst.WP].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.WP] =Board.bitboard_array_global[GenConst.WP].and(MoveConstants.SQUARE_BBS[targetSquare].not());
Board.bitboard_array_global[GenConst.BP] =Board.bitboard_array_global[GenConst.BP].and(MoveConstants.SQUARE_BBS[targetSquare + 8]);
break;
case GenConst.TAG_BLACKEP: //black ep
Board.bitboard_array_global[GenConst.BP] =Board.bitboard_array_global[GenConst.BP].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.BP] =Board.bitboard_array_global[GenConst.BP].and(MoveConstants.SQUARE_BBS[targetSquare].not());
Board.bitboard_array_global[GenConst.WP] =Board.bitboard_array_global[GenConst.WP].or(MoveConstants.SQUARE_BBS[targetSquare - 8]);
break;
case GenConst.TAG_WCASTLEKS: //WKS
//white king
Board.bitboard_array_global[GenConst.WK] =Board.bitboard_array_global[GenConst.WK].or(MoveConstants.SQUARE_BBS[GenConst.E1]);
Board.bitboard_array_global[GenConst.WK] =Board.bitboard_array_global[GenConst.WK].and(MoveConstants.SQUARE_BBS[GenConst.G1].not());
Board.bitboard_array_global[GenConst.WR] =Board.bitboard_array_global[GenConst.WR].or(MoveConstants.SQUARE_BBS[GenConst.H1]);
Board.bitboard_array_global[GenConst.WR] =Board.bitboard_array_global[GenConst.WR].and(MoveConstants.SQUARE_BBS[GenConst.F1].not());
break;
case GenConst.TAG_WCASTLEQS: //WQS
Board.bitboard_array_global[GenConst.WK] =Board.bitboard_array_global[GenConst.WK].or(MoveConstants.SQUARE_BBS[GenConst.E1]);
Board.bitboard_array_global[GenConst.WK] =Board.bitboard_array_global[GenConst.WK].and(MoveConstants.SQUARE_BBS[GenConst.C1].not());
Board.bitboard_array_global[GenConst.WR] =Board.bitboard_array_global[GenConst.WR].or(MoveConstants.SQUARE_BBS[GenConst.A1]);
Board.bitboard_array_global[GenConst.WR] =Board.bitboard_array_global[GenConst.WR].and(MoveConstants.SQUARE_BBS[GenConst.D1].not());
break;
case GenConst.TAG_BCASTLEKS: //BKS
Board.bitboard_array_global[GenConst.BK] =Board.bitboard_array_global[GenConst.BK].or(MoveConstants.SQUARE_BBS[GenConst.E8]);
Board.bitboard_array_global[GenConst.BK] =Board.bitboard_array_global[GenConst.BK].and(MoveConstants.SQUARE_BBS[GenConst.G8].not());
Board.bitboard_array_global[GenConst.BR] =Board.bitboard_array_global[GenConst.BR].or(MoveConstants.SQUARE_BBS[GenConst.H8]);
Board.bitboard_array_global[GenConst.BR] =Board.bitboard_array_global[GenConst.BR].and(MoveConstants.SQUARE_BBS[GenConst.F8].not());
break;
case GenConst.TAG_BCASTLEQS: //BQS
Board.bitboard_array_global[GenConst.BK] =Board.bitboard_array_global[GenConst.BK].or(MoveConstants.SQUARE_BBS[GenConst.E8]);
Board.bitboard_array_global[GenConst.BK] =Board.bitboard_array_global[GenConst.BK].and(MoveConstants.SQUARE_BBS[GenConst.C8].not());
Board.bitboard_array_global[GenConst.BR] =Board.bitboard_array_global[GenConst.BR].or(MoveConstants.SQUARE_BBS[GenConst.A8]);
Board.bitboard_array_global[GenConst.BR] =Board.bitboard_array_global[GenConst.BR].and(MoveConstants.SQUARE_BBS[GenConst.D8].not());
break;
case GenConst.TAG_BKnightPromotion: //BNPr
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.BN] =Board.bitboard_array_global[GenConst.BN].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case GenConst.TAG_BBishopPromotion: //BBPr
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.BB] =Board.bitboard_array_global[GenConst.BB].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case GenConst.TAG_BQueenPromotion: //BQPr
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.BQ] =Board.bitboard_array_global[GenConst.BQ].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case GenConst.TAG_BRookPromotion: //BRPr
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.BR] =Board.bitboard_array_global[GenConst.BR].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case 12: //WNPr
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.WN] =Board.bitboard_array_global[GenConst.WN].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case 13: //WBPr
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.WB] =Board.bitboard_array_global[GenConst.WB].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case 14: //WQPr
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.WQ] =Board.bitboard_array_global[GenConst.WQ].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case 15: //WRPr
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.WR] =Board.bitboard_array_global[GenConst.WR].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case 16: //BNPrCAP
assert captureIndex != -1 : "invalid capture index";
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.BN] =Board.bitboard_array_global[GenConst.BN].and(MoveConstants.SQUARE_BBS[targetSquare].not());
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].or(MoveConstants.SQUARE_BBS[targetSquare]);
break;
case 17: //BBPrCAP
assert captureIndex != -1 : "invalid capture index";
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.BB] =Board.bitboard_array_global[GenConst.BB].and(MoveConstants.SQUARE_BBS[targetSquare].not());
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].or(MoveConstants.SQUARE_BBS[targetSquare]);
break;
case 18: //BQPrCAP
assert captureIndex != -1 : "invalid capture index";
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.BQ] =Board.bitboard_array_global[GenConst.BQ].and(MoveConstants.SQUARE_BBS[targetSquare].not());
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].or(MoveConstants.SQUARE_BBS[targetSquare]);
break;
case 19: //BRPrCAP
assert captureIndex != -1 : "invalid capture index";
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.BR] =Board.bitboard_array_global[GenConst.BR].and(MoveConstants.SQUARE_BBS[targetSquare].not());
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].or(MoveConstants.SQUARE_BBS[targetSquare]);
break;
case 20: //WNPrCAP
assert captureIndex != -1 : "invalid capture index";
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.WN] =Board.bitboard_array_global[GenConst.WN].and(MoveConstants.SQUARE_BBS[targetSquare].not());
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].or(MoveConstants.SQUARE_BBS[targetSquare]);
break;
case 21: //WBPrCAP
assert captureIndex != -1 : "invalid capture index";
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.WB] =Board.bitboard_array_global[GenConst.WB].and(MoveConstants.SQUARE_BBS[targetSquare].not());
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].or(MoveConstants.SQUARE_BBS[targetSquare]);
break;
case 22: //WQPrCAP
assert captureIndex != -1 : "invalid capture index";
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.WQ] =Board.bitboard_array_global[GenConst.WQ].and(MoveConstants.SQUARE_BBS[targetSquare].not());
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].or(MoveConstants.SQUARE_BBS[targetSquare]);
break;
case 23: //WRPrCAP
assert captureIndex != -1 : "invalid capture index";
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.WR] =Board.bitboard_array_global[GenConst.WR].and(MoveConstants.SQUARE_BBS[targetSquare].not());
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].or(MoveConstants.SQUARE_BBS[targetSquare]);
break;
case 24: //WDouble
Board.bitboard_array_global[GenConst.WP] =Board.bitboard_array_global[GenConst.WP].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.WP] =Board.bitboard_array_global[GenConst.WP].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case 25: //BDouble
Board.bitboard_array_global[GenConst.BP] =Board.bitboard_array_global[GenConst.BP].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[GenConst.BP] =Board.bitboard_array_global[GenConst.BP].and(MoveConstants.SQUARE_BBS[startingSquare].not());
break;
}
}
static int getMoves(int[][] move_list)
{
Pr.println(" getMoves:");
int move_count = 0;
//#region Moves
//Move generating variables
BigInteger WHITE_OCCUPANCIES = Board.bitboard_array_global[0]
.or(Board.bitboard_array_global[1])
.or(Board.bitboard_array_global[2])
.or(Board.bitboard_array_global[3])
.or(Board.bitboard_array_global[4])
.or(Board.bitboard_array_global[5]);
BigInteger BLACK_OCCUPANCIES = Board.bitboard_array_global[6]
.or(Board.bitboard_array_global[7])
.or(Board.bitboard_array_global[8])
.or(Board.bitboard_array_global[9])
.or(Board.bitboard_array_global[10])
.or(Board.bitboard_array_global[11]);
BigInteger COMBINED_OCCUPANCIES = WHITE_OCCUPANCIES.or(BLACK_OCCUPANCIES);
BigInteger EMPTY_OCCUPANCIES = COMBINED_OCCUPANCIES.not();
BigInteger temp_bitboard, temp_pin_bitboard, temp_attack, temp_empty, temp_captures;
BigInteger check_bitboard = new BigInteger("0");
int starting_square = NO_SQUARE, target_square = NO_SQUARE;
int[][] pinArray =
{
{ -1, -1 },
{ -1, -1 },
{ -1, -1 },
{ -1, -1 },
{ -1, -1 },
{ -1, -1 },
{ -1, -1 },
{ -1, -1 },
};
int pinNumber = 0;
Pr.println(" -variables declared");
if (Board.is_white_global == true)
{
Pr.println(" white to play");
int whiteKingCheckCount = 0;
int whiteKingPosition = BitScanForward(Board.bitboard_array_global[GenConst.WK]);
Pr.print(" white king position: ");
Pr.printSquareLn(whiteKingPosition);
//#region White checks and pins
//pawns
temp_bitboard = Board.bitboard_array_global[GenConst.BP].and(MoveConstants.WHITE_PAWN_ATTACKS[whiteKingPosition]);
if (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
int pawn_square = BitScanForward(temp_bitboard);
if (check_bitboard.compareTo(BigInteger.ZERO) != 0)
{
check_bitboard = MoveConstants.SQUARE_BBS[pawn_square];
}
whiteKingCheckCount++;
}
//knights
temp_bitboard = Board.bitboard_array_global[GenConst.BN].and(MoveConstants.KNIGHT_ATTACKS[whiteKingPosition]);
if (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
int knight_square = BitScanForward(temp_bitboard);
if (check_bitboard.compareTo(BigInteger.ZERO) != 0)
{
check_bitboard = MoveConstants.SQUARE_BBS[knight_square];
}
whiteKingCheckCount++;
}
//bishops
BigInteger bishopAttacksChecks = MoveUtils.GetBishopMovesSeparate(BLACK_OCCUPANCIES, whiteKingPosition);
temp_bitboard = Board.bitboard_array_global[GenConst.BB].and(bishopAttacksChecks);
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
int piece_square = BitScanForward(temp_bitboard);
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[whiteKingPosition][piece_square].and(WHITE_OCCUPANCIES);
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
if (check_bitboard.compareTo(BigInteger.ZERO) != 0)
{
check_bitboard = Inb.INBETWEEN_BITBOARDS[whiteKingPosition][piece_square];
}
whiteKingCheckCount++;
}
else
{
int pinned_square = BitScanForward(temp_pin_bitboard);
temp_pin_bitboard = temp_pin_bitboard.and(temp_pin_bitboard.subtract(BigInteger.ONE));
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
pinArray[pinNumber][PINNED_SQUARE_INDEX] = pinned_square;
pinArray[pinNumber][PINNING_PIECE_INDEX] = piece_square;
pinNumber++;
}
}
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
}
//queen
temp_bitboard = Board.bitboard_array_global[GenConst.BQ].and(bishopAttacksChecks);
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
int piece_square = BitScanForward(temp_bitboard);
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[whiteKingPosition][piece_square].and(WHITE_OCCUPANCIES);
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
if (check_bitboard.compareTo(BigInteger.ZERO) != 0)
{
check_bitboard = Inb.INBETWEEN_BITBOARDS[whiteKingPosition][piece_square];
}
whiteKingCheckCount++;
}
else
{
int pinned_square = BitScanForward(temp_pin_bitboard);
temp_pin_bitboard = temp_pin_bitboard.and(temp_pin_bitboard.subtract(BigInteger.ONE));
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
pinArray[pinNumber][PINNED_SQUARE_INDEX] = pinned_square;
pinArray[pinNumber][PINNING_PIECE_INDEX] = piece_square;
pinNumber++;
}
}
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
}
//rook
BigInteger rook_attacks = MoveUtils.GetRookMovesSeparate(BLACK_OCCUPANCIES, whiteKingPosition);
temp_bitboard = Board.bitboard_array_global[GenConst.BR].and(rook_attacks);
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
int piece_square = BitScanForward(temp_bitboard);
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[whiteKingPosition][piece_square].and(WHITE_OCCUPANCIES);
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
if (check_bitboard.compareTo(BigInteger.ZERO) != 0)
{
check_bitboard = Inb.INBETWEEN_BITBOARDS[whiteKingPosition][piece_square];
}
whiteKingCheckCount++;
}
else
{
int pinned_square = BitScanForward(temp_pin_bitboard);
temp_pin_bitboard = temp_pin_bitboard.and(temp_pin_bitboard.subtract(BigInteger.ONE));
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
pinArray[pinNumber][PINNED_SQUARE_INDEX] = pinned_square;
pinArray[pinNumber][PINNING_PIECE_INDEX] = piece_square;
pinNumber++;
}
}
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
}
//queen
temp_bitboard = Board.bitboard_array_global[GenConst.BQ].and(rook_attacks);
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
int piece_square = BitScanForward(temp_bitboard);
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[whiteKingPosition][piece_square].and(WHITE_OCCUPANCIES);
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
if (check_bitboard.compareTo(BigInteger.ZERO) != 0)
{
check_bitboard = Inb.INBETWEEN_BITBOARDS[whiteKingPosition][piece_square];
}
whiteKingCheckCount++;
}
else
{
int pinned_square = BitScanForward(temp_pin_bitboard);
temp_pin_bitboard = temp_pin_bitboard.and(temp_pin_bitboard.subtract(BigInteger.ONE));
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
pinArray[pinNumber][PINNED_SQUARE_INDEX] = pinned_square;
pinArray[pinNumber][PINNING_PIECE_INDEX] = piece_square;
pinNumber++;
}
}
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
}
Pr.println(" -pins and checks complete: ");
Pr.print(" white king check count: ");
Pr.printIntLn(whiteKingCheckCount);
Pr.print(" pin count: ");
Pr.printIntLn(pinNumber);
Pr.println(" _____________");
//#endregion
BigInteger occupanciesWithoutWhiteKing = COMBINED_OCCUPANCIES.and(Board.bitboard_array_global[GenConst.WK].not());
int wKingMoveCount = 0;
temp_attack = MoveConstants.KING_ATTACKS[whiteKingPosition];
temp_empty = temp_attack.and(EMPTY_OCCUPANCIES);
while (temp_empty.signum() != 0) // Using BigInteger's signum() to check if it's not 0
{
target_square = BitScanForward(temp_empty);
temp_empty = temp_empty.and(temp_empty.subtract(BigInteger.ONE)); // Using BigInteger's subtract and and
if (Board.bitboard_array_global[GenConst.BP].and(MoveConstants.WHITE_PAWN_ATTACKS[target_square]).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.BN].and(MoveConstants.KNIGHT_ATTACKS[target_square]).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.BK].and(MoveConstants.KING_ATTACKS[target_square]).signum() != 0) {
continue;
}
BigInteger bishopAttacks = MoveUtils.GetBishopMovesSeparate(occupanciesWithoutWhiteKing, target_square);
if (Board.bitboard_array_global[GenConst.BB].and(bishopAttacks).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.BQ].and(bishopAttacks).signum() != 0) {
continue;
}
BigInteger rookAttacks = MoveUtils.GetRookMovesSeparate(occupanciesWithoutWhiteKing, target_square);
if (Board.bitboard_array_global[GenConst.BR].and(rookAttacks).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.BQ].and(rookAttacks).signum() != 0) {
continue;
}
move_list[move_count][MOVE_STARTING] = whiteKingPosition;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_NONE;
move_list[move_count][MOVE_PIECE] = GenConst.WK;
move_count++;
wKingMoveCount++;
}
//captures
temp_captures = temp_attack.and(BLACK_OCCUPANCIES);
while (temp_captures.signum() != 0) // Using BigInteger's signum() to check if it's not 0
{
target_square = BitScanForward(temp_captures);
temp_captures = temp_captures.and(temp_captures.subtract(BigInteger.ONE)); // Using BigInteger's subtract and and
if (Board.bitboard_array_global[GenConst.BP].and(MoveConstants.WHITE_PAWN_ATTACKS[target_square]).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.BN].and(MoveConstants.KNIGHT_ATTACKS[target_square]).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.BK].and(MoveConstants.KING_ATTACKS[target_square]).signum() != 0) {
continue;
}
BigInteger bishopAttacks = MoveUtils.GetBishopMovesSeparate(occupanciesWithoutWhiteKing, target_square);
if (Board.bitboard_array_global[GenConst.BB].and(bishopAttacks).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.BQ].and(bishopAttacks).signum() != 0) {
continue;
}
BigInteger rookAttacks = MoveUtils.GetRookMovesSeparate(occupanciesWithoutWhiteKing, target_square);
if (Board.bitboard_array_global[GenConst.BR].and(rookAttacks).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.BQ].and(rookAttacks).signum() != 0) {
continue;
}
move_list[move_count][MOVE_STARTING] = whiteKingPosition;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_CAPTURE;
move_list[move_count][MOVE_PIECE] = GenConst.WK;
move_count++;
wKingMoveCount++;
}
Pr.print(" white king move count: ");
Pr.printIntLn(wKingMoveCount);
Pr.println(" _____________");
if (whiteKingCheckCount < 2)
{
if (whiteKingCheckCount == 0)
{
check_bitboard = MAX_ULONG;
}
//#region White castling
if (whiteKingCheckCount == 0)
{
if (Board.castle_rights_global[WKS_CASTLE_RIGHTS] == true)
{
if (whiteKingPosition == GenConst.E1) //king on e1
{
if (isNotZero(WKS_EMPTY_BITBOARD.and(COMBINED_OCCUPANCIES)) == false) //f1 and g1 empty
{
if (isNotZero(Board.bitboard_array_global[GenConst.WR].and(MoveConstants.SQUARE_BBS[GenConst.H1])) == false) //rook on h1
{
if (MoveUtils.Is_Square_Attacked_By_Black_Global(GenConst.F1, COMBINED_OCCUPANCIES) == false)
{
if (MoveUtils.Is_Square_Attacked_By_Black_Global(GenConst.G1, COMBINED_OCCUPANCIES) == false)
{
move_list[move_count][MOVE_STARTING] = GenConst.E1;
move_list[move_count][MOVE_TARGET] = GenConst.G1;
move_list[move_count][MOVE_TAG] = GenConst.TAG_WCASTLEKS;
move_list[move_count][MOVE_PIECE] = GenConst.WK;
move_count++;
}
}
}
}
}
}
if (Board.castle_rights_global[WQS_CASTLE_RIGHTS] == true)
{
if (whiteKingPosition == GenConst.E1) //king on e1
{
if (isNotZero(WQS_EMPTY_BITBOARD.and(COMBINED_OCCUPANCIES)) == false) //f1 and g1 empty
{
if ((isNotZero(Board.bitboard_array_global[GenConst.WR].and(MoveConstants.SQUARE_BBS[GenConst.A1]))) == true) //rook on h1
{
if (MoveUtils.Is_Square_Attacked_By_Black_Global(GenConst.C1, COMBINED_OCCUPANCIES) == false)
{
if (MoveUtils.Is_Square_Attacked_By_Black_Global(GenConst.D1, COMBINED_OCCUPANCIES) == false)
{
move_list[move_count][MOVE_STARTING] = GenConst.E1;
move_list[move_count][MOVE_TARGET] = GenConst.C1;
move_list[move_count][MOVE_TAG] = GenConst.TAG_WCASTLEQS;
move_list[move_count][MOVE_PIECE] = GenConst.WK;
move_count++;
}
}
}
}
}
}
}
//#endregion
//#region White knight moves
Pr.println(" -white knight moves: ");
temp_bitboard = Board.bitboard_array_global[GenConst.WN];
Pr.print(" white knight bitboard: ");
Pr.printBigIntegerLn(temp_bitboard);
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
starting_square = BitScanForward(temp_bitboard);
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE)); //removes the knight from that square to not infinitely loop
Pr.println("\n knight on square: " + starting_square);
temp_pin_bitboard = MAX_ULONG;
if (pinNumber != 0)
{
for (int i = 0; i < pinNumber; i++)
{
if (pinArray[i][PINNED_SQUARE_INDEX] == starting_square)
{
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[whiteKingPosition][pinArray[i][PINNING_PIECE_INDEX]];
}
}
}
temp_attack = ((MoveConstants.KNIGHT_ATTACKS[starting_square].and(BLACK_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard))); //gets knight captures
Pr.println(" knight captures: " + temp_attack);
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_CAPTURE;
move_list[move_count][MOVE_PIECE] = GenConst.WN;
move_count++;
}
temp_attack = ((MoveConstants.KNIGHT_ATTACKS[starting_square].and(EMPTY_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard)));
Pr.println(" knight regular moves: " + temp_attack);
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_NONE;
move_list[move_count][MOVE_PIECE] = GenConst.WN;
move_count++;
}
}
//#endregion
//#region White pawn moves
Pr.println(" _____________");
Pr.println(" movecount: " + move_count);
temp_bitboard = Board.bitboard_array_global[GenConst.WP];
Pr.println(" -white pawn moves: ");
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
starting_square = BitScanForward(temp_bitboard);
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
Pr.println("\n pawn on square: " + starting_square);
temp_pin_bitboard = MAX_ULONG;
if (pinNumber != 0)
{
for (int i = 0; i < pinNumber; i++)
{
if (pinArray[i][PINNED_SQUARE_INDEX] == starting_square)
{
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[whiteKingPosition][pinArray[i][PINNING_PIECE_INDEX]];
}
}
}
//#region pawn forward
if (isZero(MoveConstants.SQUARE_BBS[starting_square - 8].and(COMBINED_OCCUPANCIES)) == true) //if up one square is empty
{
if (isNotZero(MoveConstants.SQUARE_BBS[starting_square - 8].and(check_bitboard).and(temp_pin_bitboard)) == true) //if not pinned or check
{
if (isNotZero(MoveConstants.SQUARE_BBS[starting_square].and(RANK_7_BITBOARD))) //if promotion
{
Pr.println(" pawn promotion forward!");
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = starting_square - 8;
move_list[move_count][MOVE_TAG] = GenConst.TAG_WQueenPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.WP;
move_count++;
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = starting_square - 8;
move_list[move_count][MOVE_TAG] = GenConst.TAG_WRookPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.WP;
move_count++;
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = starting_square - 8;
move_list[move_count][MOVE_TAG] = GenConst.TAG_WBishopPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.WP;
move_count++;
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = starting_square - 8;
move_list[move_count][MOVE_TAG] = GenConst.TAG_WBishopPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.WP;
move_count++;
}
else
{
Pr.println(" pawn forward one");
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = starting_square - 8;
move_list[move_count][MOVE_TAG] = GenConst.TAG_NONE;
move_list[move_count][MOVE_PIECE] = GenConst.WP;
move_count++;
}
}
if ((isNotZero(MoveConstants.SQUARE_BBS[starting_square].and(RANK_2_BITBOARD))) == true) //if on rank 2
{
if (isNotZero(MoveConstants.SQUARE_BBS[starting_square - 16].and(check_bitboard).and(temp_pin_bitboard)) == true) //if not pinned or
{
if (isZero(MoveConstants.SQUARE_BBS[starting_square - 16].and(COMBINED_OCCUPANCIES)) == true) //if up two squares and one square are empty
{
Pr.println(" pawn forward two");
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = starting_square - 16;
move_list[move_count][MOVE_TAG] = GenConst.TAG_DoublePawnWhite;
move_list[move_count][MOVE_PIECE] = GenConst.WP;
move_count++;
}
}
}
}
//#endregion
//#region pawn attacks
temp_attack = ((MoveConstants.WHITE_PAWN_ATTACKS[starting_square].and(BLACK_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard))); //if black piece diagonal to pawn
Pr.println(" pawn attacks: " + temp_attack);
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
if (isNotZero(MoveConstants.SQUARE_BBS[starting_square].and(RANK_7_BITBOARD)) == true) //if promotion
{
Pr.println(" pawn promotion attack!");
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_WCaptureQueenPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.WP;
move_count++;
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_WCaptureRookPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.WP;
move_count++;
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_WCaptureBishopPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.WP;
move_count++;
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_WCaptureKnightPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.WP;
move_count++;
}
else
{
Pr.println(" add pawn attack move " + starting_square + " to " + target_square);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_CAPTURE;
move_list[move_count][MOVE_PIECE] = GenConst.WP;
move_count++;
}
}
if (isNotZero(MoveConstants.SQUARE_BBS[starting_square].and(RANK_5_BITBOARD)))
{ // check rank for ep
if (Board.ep != NO_SQUARE)
{
if (isNotZero(MoveConstants.WHITE_PAWN_ATTACKS[starting_square]
.and(MoveConstants.SQUARE_BBS[Board.ep])
.and(check_bitboard)
.and(temp_pin_bitboard))) {
if (isZero(Board.bitboard_array_global[GenConst.WK].and(RANK_5_BITBOARD))) { // if no king on rank 5
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = Board.ep;
move_list[move_count][MOVE_TAG] = GenConst.TAG_WHITEEP;
move_list[move_count][MOVE_PIECE] = GenConst.WP;
move_count++;
} else if (isZero(Board.bitboard_array_global[GenConst.BR].and(RANK_5_BITBOARD)) &&
isZero(Board.bitboard_array_global[GenConst.BQ].and(RANK_5_BITBOARD))) { // if no b rook or queen on rank 5
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = Board.ep;
move_list[move_count][MOVE_TAG] = GenConst.TAG_WHITEEP;
move_list[move_count][MOVE_PIECE] = GenConst.WP;
move_count++;
} else { // wk and br or bq on rank 5
BigInteger occupancyWithoutEPPawns = COMBINED_OCCUPANCIES.and(MoveConstants.SQUARE_BBS[starting_square].not());
occupancyWithoutEPPawns = occupancyWithoutEPPawns.and(MoveConstants.SQUARE_BBS[Board.ep + 8].not());
BigInteger rookAttacksFromKing = MoveUtils.GetRookMovesSeparate(occupancyWithoutEPPawns, whiteKingPosition);
if (isZero(rookAttacksFromKing.and(Board.bitboard_array_global[GenConst.BR])))
{
if (isZero(rookAttacksFromKing.and(Board.bitboard_array_global[GenConst.BQ])))
{
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = Board.ep;
move_list[move_count][MOVE_TAG] = GenConst.TAG_WHITEEP;
move_list[move_count][MOVE_PIECE] = GenConst.WP;
move_count++;
}
}
}
}
}
}
//#endregion
}
//#endregion
Pr.println(" -after pawns");
//#region White rook moves
temp_bitboard = Board.bitboard_array_global[GenConst.WR];
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
starting_square = BitScanForward(temp_bitboard);
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
temp_pin_bitboard = MAX_ULONG;
if (pinNumber != 0)
{
for (int i = 0; i < pinNumber; i++)
{
if (pinArray[i][PINNED_SQUARE_INDEX] == starting_square)
{
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[whiteKingPosition][pinArray[i][PINNING_PIECE_INDEX]];
}
}
}
BigInteger rookAttacks = MoveUtils.GetRookMovesSeparate(COMBINED_OCCUPANCIES, starting_square);
temp_attack = ((rookAttacks.and(BLACK_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard)));
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_CAPTURE;
move_list[move_count][MOVE_PIECE] = GenConst.WR;
move_count++;
}
temp_attack = ((rookAttacks.and(EMPTY_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard)));
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_NONE;
move_list[move_count][MOVE_PIECE] = GenConst.WR;
move_count++;
}
}
//#endregion
Pr.println(" -after rooks");
//#region White bishop moves
//Pr.println("\nwhite bishop");
temp_bitboard = Board.bitboard_array_global[GenConst.WB];
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
starting_square = BitScanForward(temp_bitboard);
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
temp_pin_bitboard = MAX_ULONG;
if (pinNumber != 0)
{
for (int i = 0; i < pinNumber; i++)
{
if (pinArray[i][PINNED_SQUARE_INDEX] == starting_square)
{
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[whiteKingPosition][pinArray[i][PINNING_PIECE_INDEX]];
}
}
}
//Pr.println("get bishop attacks");
BigInteger bishopAttacks = MoveUtils.GetBishopMovesSeparate(COMBINED_OCCUPANCIES, starting_square);
//Pr.println("bishop attacks");
//Pr.printBigIntegerLn(bishopAttacks);
temp_attack = ((bishopAttacks.and(BLACK_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard)));
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_CAPTURE;
move_list[move_count][MOVE_PIECE] = GenConst.WB;
move_count++;
}
temp_attack = ((bishopAttacks.and(EMPTY_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard)));
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_NONE;
move_list[move_count][MOVE_PIECE] = GenConst.WB;
move_count++;
}
}
//#endregion
Pr.println(" -after bishop");
//#region White queen moves
Pr.println("______________");
Pr.println(" white queen:");
temp_bitboard = Board.bitboard_array_global[GenConst.WQ];
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
starting_square = BitScanForward(temp_bitboard);
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
Pr.println("\n queen on square: " + starting_square);
temp_pin_bitboard = MAX_ULONG;
if (pinNumber != 0)
{
for (int i = 0; i < pinNumber; i++)
{
if (pinArray[i][PINNED_SQUARE_INDEX] == starting_square)
{
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[whiteKingPosition][pinArray[i][PINNING_PIECE_INDEX]];
}
}
}
BigInteger queenAttacks = MoveUtils.GetRookMovesSeparate(COMBINED_OCCUPANCIES, starting_square);
Pr.println("\n queen attacks rook: " + queenAttacks);
queenAttacks = queenAttacks.or(MoveUtils.GetBishopMovesSeparate(COMBINED_OCCUPANCIES, starting_square));
Pr.println("\n queen attacks combined: " + queenAttacks);
temp_attack = ((queenAttacks.and(BLACK_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard)));
Pr.println("\n queen attacks captures: " + temp_attack);
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_CAPTURE;
move_list[move_count][MOVE_PIECE] = GenConst.WQ;
move_count++;
Pr.println(" add queen attack capture " + starting_square + " to " + target_square);
}
temp_attack = ((queenAttacks.and(EMPTY_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard)));
Pr.println("\n queen regular moves: " + temp_attack);
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_NONE;
move_list[move_count][MOVE_PIECE] = GenConst.WQ;
move_count++;
Pr.println(" add queen move " + starting_square + " to " + target_square);
}
}
//#endregion
Pr.println(" -after queen");
}
}
else //black move
{
int blackKingCheckCount = 0;
int blackKingPosition = BitScanForward(Board.bitboard_array_global[GenConst.BK]);
// Pr.print(" black king position: ");
// Pr.printIntLn(blackKingPosition);
//#region black checks and pins
//pawns
temp_bitboard = Board.bitboard_array_global[GenConst.WP].and(MoveConstants.BLACK_PAWN_ATTACKS[blackKingPosition]);
if (temp_bitboard.compareTo(BigInteger.ZERO) != 0) //if there is pawn attacking king
{
int pawn_square = BitScanForward(temp_bitboard);
if (check_bitboard.compareTo(BigInteger.ZERO) != 0)
{
check_bitboard = MoveConstants.SQUARE_BBS[pawn_square];
}
blackKingCheckCount++;
}
//knights
temp_bitboard = Board.bitboard_array_global[GenConst.WN].and(MoveConstants.KNIGHT_ATTACKS[blackKingPosition]);
if (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
int knight_square = BitScanForward(temp_bitboard);
if (check_bitboard.compareTo(BigInteger.ZERO) != 0)
{
check_bitboard = MoveConstants.SQUARE_BBS[knight_square];
}
blackKingCheckCount++;
}
//bishops
BigInteger bishopAttacksChecks = MoveUtils.GetBishopMovesSeparate(WHITE_OCCUPANCIES, blackKingPosition);
temp_bitboard = Board.bitboard_array_global[GenConst.WB].and(bishopAttacksChecks);
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
int piece_square = BitScanForward(temp_bitboard);
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[blackKingPosition][piece_square].and(BLACK_OCCUPANCIES);
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
if (check_bitboard.compareTo(BigInteger.ZERO) != 0)
{
check_bitboard = Inb.INBETWEEN_BITBOARDS[blackKingPosition][piece_square];
}
blackKingCheckCount++;
}
else
{
int pinned_square = BitScanForward(temp_pin_bitboard);
temp_pin_bitboard = temp_pin_bitboard.and(temp_pin_bitboard.subtract(BigInteger.ONE));
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
pinArray[pinNumber][PINNED_SQUARE_INDEX] = pinned_square;
pinArray[pinNumber][PINNING_PIECE_INDEX] = piece_square;
pinNumber++;
}
}
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
}
//queen
temp_bitboard = Board.bitboard_array_global[GenConst.WQ].and(bishopAttacksChecks);
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
int piece_square = BitScanForward(temp_bitboard);
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[blackKingPosition][piece_square].and(BLACK_OCCUPANCIES);
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
if (check_bitboard.compareTo(BigInteger.ZERO) != 0)
{
check_bitboard = Inb.INBETWEEN_BITBOARDS[blackKingPosition][piece_square];
}
blackKingCheckCount++;
}
else
{
int pinned_square = BitScanForward(temp_pin_bitboard);
temp_pin_bitboard = temp_pin_bitboard.and(temp_pin_bitboard.subtract(BigInteger.ONE));
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
pinArray[pinNumber][PINNED_SQUARE_INDEX] = pinned_square;
pinArray[pinNumber][PINNING_PIECE_INDEX] = piece_square;
pinNumber++;
}
}
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
}
//rook
BigInteger rook_attacks = MoveUtils.GetRookMovesSeparate(WHITE_OCCUPANCIES, blackKingPosition);
temp_bitboard = Board.bitboard_array_global[GenConst.WR].and(rook_attacks);
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
int piece_square = BitScanForward(temp_bitboard);
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[blackKingPosition][piece_square].and(BLACK_OCCUPANCIES);
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
if (check_bitboard.compareTo(BigInteger.ZERO) != 0)
{
check_bitboard = Inb.INBETWEEN_BITBOARDS[blackKingPosition][piece_square];
}
blackKingCheckCount++;
}
else
{
int pinned_square = BitScanForward(temp_pin_bitboard);
temp_pin_bitboard = temp_pin_bitboard.and(temp_pin_bitboard.subtract(BigInteger.ONE));
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
pinArray[pinNumber][PINNED_SQUARE_INDEX] = pinned_square;
pinArray[pinNumber][PINNING_PIECE_INDEX] = piece_square;
pinNumber++;
}
}
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
}
//queen
temp_bitboard = Board.bitboard_array_global[GenConst.WQ].and(rook_attacks);
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
int piece_square = BitScanForward(temp_bitboard);
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[blackKingPosition][piece_square].and(WHITE_OCCUPANCIES);
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
if (check_bitboard.compareTo(BigInteger.ZERO) != 0)
{
check_bitboard = Inb.INBETWEEN_BITBOARDS[blackKingPosition][piece_square];
}
blackKingCheckCount++;
}
else
{
int pinned_square = BitScanForward(temp_pin_bitboard);
temp_pin_bitboard = temp_pin_bitboard.and(temp_pin_bitboard.subtract(BigInteger.ONE));
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
pinArray[pinNumber][PINNED_SQUARE_INDEX] = pinned_square;
pinArray[pinNumber][PINNING_PIECE_INDEX] = piece_square;
pinNumber++;
}
}
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
}
//#endregion
BigInteger occupanciesWithoutWhiteKing = COMBINED_OCCUPANCIES.and(Board.bitboard_array_global[GenConst.WK].not());
temp_attack = MoveConstants.KING_ATTACKS[blackKingPosition];
temp_empty = temp_attack.and(EMPTY_OCCUPANCIES);
while (temp_empty.signum() != 0) // Using BigInteger's signum() to check if it's not 0
{
target_square = BitScanForward(temp_empty);
temp_empty = temp_empty.and(temp_empty.subtract(BigInteger.ONE)); // Using BigInteger's subtract and and
if (Board.bitboard_array_global[GenConst.WP].and(MoveConstants.BLACK_PAWN_ATTACKS[target_square]).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.WN].and(MoveConstants.KNIGHT_ATTACKS[target_square]).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.WK].and(MoveConstants.KING_ATTACKS[target_square]).signum() != 0) {
continue;
}
BigInteger bishopAttacks = MoveUtils.GetBishopMovesSeparate(occupanciesWithoutWhiteKing, target_square);
if (Board.bitboard_array_global[GenConst.WB].and(bishopAttacks).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.WQ].and(bishopAttacks).signum() != 0) {
continue;
}
BigInteger rookAttacks = MoveUtils.GetRookMovesSeparate(occupanciesWithoutWhiteKing, target_square);
if (Board.bitboard_array_global[GenConst.WR].and(rookAttacks).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.WQ].and(rookAttacks).signum() != 0) {
continue;
}
move_list[move_count][MOVE_STARTING] = blackKingPosition;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_NONE;
move_list[move_count][MOVE_PIECE] = GenConst.BK;
move_count++;
}
//captures
temp_captures = temp_attack.and(WHITE_OCCUPANCIES);
while (temp_captures.signum() != 0) // Using BigInteger's signum() to check if it's not 0
{
target_square = BitScanForward(temp_captures);
temp_captures = temp_captures.and(temp_captures.subtract(BigInteger.ONE)); // Using BigInteger's subtract and and
if (Board.bitboard_array_global[GenConst.WP].and(MoveConstants.BLACK_PAWN_ATTACKS[target_square]).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.WN].and(MoveConstants.KNIGHT_ATTACKS[target_square]).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.WK].and(MoveConstants.KING_ATTACKS[target_square]).signum() != 0) {
continue;
}
BigInteger bishopAttacks = MoveUtils.GetBishopMovesSeparate(occupanciesWithoutWhiteKing, target_square);
if (Board.bitboard_array_global[GenConst.WB].and(bishopAttacks).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.WQ].and(bishopAttacks).signum() != 0) {
continue;
}
BigInteger rookAttacks = MoveUtils.GetRookMovesSeparate(occupanciesWithoutWhiteKing, target_square);
if (Board.bitboard_array_global[GenConst.WR].and(rookAttacks).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.WQ].and(rookAttacks).signum() != 0) {
continue;
}
move_list[move_count][MOVE_STARTING] = blackKingPosition;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_CAPTURE;
move_list[move_count][MOVE_PIECE] = GenConst.BK;
move_count++;
}
if (blackKingCheckCount < 2)
{
if (blackKingCheckCount == 0)
{
check_bitboard = MAX_ULONG;
}
//#region Black castling
if (blackKingCheckCount == 0)
{
if (Board.castle_rights_global[BKS_CASTLE_RIGHTS] == true)
{
if (blackKingPosition == GenConst.E8) //king on e1
{
if (isNotZero(BKS_EMPTY_BITBOARD.and(COMBINED_OCCUPANCIES)) == false) //f1 and g1 empty
{
if (isNotZero(Board.bitboard_array_global[GenConst.BR].and(MoveConstants.SQUARE_BBS[GenConst.H8])) == false) //rook on h8
{
if (MoveUtils.Is_Square_Attacked_By_White_Global(GenConst.F8, COMBINED_OCCUPANCIES) == false)
{
if (MoveUtils.Is_Square_Attacked_By_White_Global(GenConst.G8, COMBINED_OCCUPANCIES) == false)
{
move_list[move_count][MOVE_STARTING] = GenConst.E8;
move_list[move_count][MOVE_TARGET] = GenConst.G8;
move_list[move_count][MOVE_TAG] = GenConst.TAG_BCASTLEKS;
move_list[move_count][MOVE_PIECE] = GenConst.BK;
move_count++;
}
}
}
}
}
}
if (Board.castle_rights_global[BQS_CASTLE_RIGHTS] == true)
{
if (blackKingPosition == GenConst.E8) //king on e1
{
if (isNotZero(BQS_EMPTY_BITBOARD.and(COMBINED_OCCUPANCIES)) == false) //f1 and g1 empty
{
if ((isNotZero(Board.bitboard_array_global[GenConst.BR].and(MoveConstants.SQUARE_BBS[GenConst.A8]))) == true) //rook on h1
{
if (MoveUtils.Is_Square_Attacked_By_White_Global(GenConst.C8, COMBINED_OCCUPANCIES) == false)
{
if (MoveUtils.Is_Square_Attacked_By_White_Global(GenConst.D8, COMBINED_OCCUPANCIES) == false)
{
move_list[move_count][MOVE_STARTING] = GenConst.E8;
move_list[move_count][MOVE_TARGET] = GenConst.C8;
move_list[move_count][MOVE_TAG] = GenConst.TAG_BCASTLEQS;
move_list[move_count][MOVE_PIECE] = GenConst.BK;
move_count++;
}
}
}
}
}
}
}
//#endregion
//#region Black knight moves
temp_bitboard = Board.bitboard_array_global[GenConst.BN];
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
starting_square = BitScanForward(temp_bitboard);
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE)); //removes the knight from that square to not infinitely loop
temp_pin_bitboard = MAX_ULONG;
if (pinNumber != 0)
{
for (int i = 0; i < pinNumber; i++)
{
if (pinArray[i][PINNED_SQUARE_INDEX] == starting_square)
{
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[blackKingPosition][pinArray[i][PINNING_PIECE_INDEX]];
}
}
}
temp_attack = ((MoveConstants.KNIGHT_ATTACKS[starting_square].and(WHITE_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard))); //gets knight captures
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_CAPTURE;
move_list[move_count][MOVE_PIECE] = GenConst.BN;
move_count++;
}
temp_attack = ((MoveConstants.KNIGHT_ATTACKS[starting_square].and(EMPTY_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard)));
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_NONE;
move_list[move_count][MOVE_PIECE] = GenConst.BN;
move_count++;
}
}
//#endregion
//#region Black pawn moves
temp_bitboard = Board.bitboard_array_global[GenConst.BP];
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
starting_square = BitScanForward(temp_bitboard);
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
temp_pin_bitboard = MAX_ULONG;
if (pinNumber != 0)
{
for (int i = 0; i < pinNumber; i++)
{
if (pinArray[i][PINNED_SQUARE_INDEX] == starting_square)
{
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[blackKingPosition][pinArray[i][PINNING_PIECE_INDEX]];
}
}
}
//#region pawn forward
if (isZero(MoveConstants.SQUARE_BBS[starting_square + 8].and(COMBINED_OCCUPANCIES)) == true) //if up one square is empty
{
if (isNotZero(MoveConstants.SQUARE_BBS[starting_square + 8].and(check_bitboard).and(temp_pin_bitboard)) == true) //if not pinned or check
{
if (isNotZero(MoveConstants.SQUARE_BBS[starting_square].and(RANK_2_BITBOARD))) //if promotion
{
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = starting_square + 8;
move_list[move_count][MOVE_TAG] = GenConst.TAG_BQueenPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.BP;
move_count++;
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = starting_square + 8;
move_list[move_count][MOVE_TAG] = GenConst.TAG_BRookPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.BP;
move_count++;
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = starting_square + 8;
move_list[move_count][MOVE_TAG] = GenConst.TAG_BBishopPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.BP;
move_count++;
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = starting_square + 8;
move_list[move_count][MOVE_TAG] = GenConst.TAG_BBishopPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.BP;
move_count++;
}
else
{
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = starting_square + 8;
move_list[move_count][MOVE_TAG] = GenConst.TAG_NONE;
move_list[move_count][MOVE_PIECE] = GenConst.BP;
move_count++;
}
}
if ((isNotZero(MoveConstants.SQUARE_BBS[starting_square].and(RANK_7_BITBOARD))) == true) //if on rank 7
{
if (isNotZero(MoveConstants.SQUARE_BBS[starting_square + 16].and(check_bitboard).and(temp_pin_bitboard)) == true) //if not pinned or
{
if (isZero(MoveConstants.SQUARE_BBS[starting_square + 16].and(COMBINED_OCCUPANCIES)) == true) //if up two squares and one square are empty
{
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = starting_square + 16;
move_list[move_count][MOVE_TAG] = GenConst.TAG_DoublePawnBlack;
move_list[move_count][MOVE_PIECE] = GenConst.BP;
move_count++;
}
}
}
}
//#endregion
//#region pawn attacks
temp_attack = ((MoveConstants.BLACK_PAWN_ATTACKS[starting_square].and(WHITE_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard))); //if black piece diagonal to pawn
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
if (isNotZero(MoveConstants.SQUARE_BBS[starting_square].and(RANK_2_BITBOARD)) == true) //if promotion
{
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_BCaptureQueenPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.BP;
move_count++;
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_BCaptureRookPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.BP;
move_count++;
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_BCaptureBishopPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.BP;
move_count++;
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_BCaptureKnightPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.BP;
move_count++;
}
else
{
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_CAPTURE;
move_list[move_count][MOVE_PIECE] = GenConst.BP;
move_count++;
}
}
if (isNotZero(MoveConstants.SQUARE_BBS[starting_square].and(RANK_4_BITBOARD)))
{ // check rank for ep
if (Board.ep != NO_SQUARE)
{
if (isNotZero(MoveConstants.BLACK_PAWN_ATTACKS[starting_square]
.and(MoveConstants.SQUARE_BBS[Board.ep])
.and(check_bitboard)
.and(temp_pin_bitboard))) {
if (isZero(Board.bitboard_array_global[GenConst.WK].and(RANK_4_BITBOARD))) { // if no king on rank 5
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = Board.ep;
move_list[move_count][MOVE_TAG] = GenConst.TAG_BLACKEP;
move_list[move_count][MOVE_PIECE] = GenConst.BP;
move_count++;
} else if (isZero(Board.bitboard_array_global[GenConst.WR].and(RANK_4_BITBOARD)) &&
isZero(Board.bitboard_array_global[GenConst.WQ].and(RANK_4_BITBOARD))) { // if no b rook or queen on rank 5
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = Board.ep;
move_list[move_count][MOVE_TAG] = GenConst.TAG_BLACKEP;
move_list[move_count][MOVE_PIECE] = GenConst.BP;
move_count++;
} else { // wk and br or bq on rank 5
BigInteger occupancyWithoutEPPawns = COMBINED_OCCUPANCIES.and(MoveConstants.SQUARE_BBS[starting_square].not());
occupancyWithoutEPPawns = occupancyWithoutEPPawns.and(MoveConstants.SQUARE_BBS[Board.ep - 8].not());
BigInteger rookAttacksFromKing = MoveUtils.GetRookMovesSeparate(occupancyWithoutEPPawns, blackKingPosition);
if (isZero(rookAttacksFromKing.and(Board.bitboard_array_global[GenConst.WR])))
{
if (isZero(rookAttacksFromKing.and(Board.bitboard_array_global[GenConst.WQ])))
{
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = Board.ep;
move_list[move_count][MOVE_TAG] = GenConst.TAG_BLACKEP;
move_list[move_count][MOVE_PIECE] = GenConst.BP;
move_count++;
}
}
}
}
}
}
//#endregion
}
//#endregion
//#region Black rook moves
temp_bitboard = Board.bitboard_array_global[GenConst.BR];
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
starting_square = BitScanForward(temp_bitboard);
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
// Pr.print(" rook square: ");
// Pr.printIntLn(starting_square);
temp_pin_bitboard = MAX_ULONG;
if (pinNumber != 0)
{
for (int i = 0; i < pinNumber; i++)
{
if (pinArray[i][PINNED_SQUARE_INDEX] == starting_square)
{
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[blackKingPosition][pinArray[i][PINNING_PIECE_INDEX]];
}
}
}
BigInteger rookAttacks = MoveUtils.GetRookMovesSeparate(COMBINED_OCCUPANCIES, starting_square);
// Pr.print("rook attacks:");
// Pr.printBigIntegerLn(rookAttacks);
temp_attack = ((rookAttacks.and(WHITE_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard)));
// Pr.print("against white:");
// Pr.printBigIntegerLn(temp_attack);
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_CAPTURE;
move_list[move_count][MOVE_PIECE] = GenConst.BR;
move_count++;
}
temp_attack = ((rookAttacks.and(EMPTY_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard)));
// Pr.print("against empty:");
// Pr.printBigIntegerLn(temp_attack);
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_NONE;
move_list[move_count][MOVE_PIECE] = GenConst.BR;
move_count++;
}
}
//#endregion
//#region Black bishop moves
temp_bitboard = Board.bitboard_array_global[GenConst.BB];
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
starting_square = BitScanForward(temp_bitboard);
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
temp_pin_bitboard = MAX_ULONG;
if (pinNumber != 0)
{
for (int i = 0; i < pinNumber; i++)
{
if (pinArray[i][PINNED_SQUARE_INDEX] == starting_square)
{
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[blackKingPosition][pinArray[i][PINNING_PIECE_INDEX]];
}
}
}
BigInteger bishopAttacks = MoveUtils.GetBishopMovesSeparate(COMBINED_OCCUPANCIES, starting_square);
temp_attack = ((bishopAttacks.and(WHITE_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard)));
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_CAPTURE;
move_list[move_count][MOVE_PIECE] = GenConst.BB;
move_count++;
}
temp_attack = ((bishopAttacks.and(EMPTY_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard)));
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_NONE;
move_list[move_count][MOVE_PIECE] = GenConst.BB;
move_count++;
}
}
//#endregion
//#region Black queen moves
temp_bitboard = Board.bitboard_array_global[GenConst.BQ];
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
starting_square = BitScanForward(temp_bitboard);
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
temp_pin_bitboard = MAX_ULONG;
if (pinNumber != 0)
{
for (int i = 0; i < pinNumber; i++)
{
if (pinArray[i][PINNED_SQUARE_INDEX] == starting_square)
{
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[blackKingPosition][pinArray[i][PINNING_PIECE_INDEX]];
}
}
}
BigInteger queenAttacks = MoveUtils.GetRookMovesSeparate(COMBINED_OCCUPANCIES, starting_square);
queenAttacks = queenAttacks.or(MoveUtils.GetBishopMovesSeparate(COMBINED_OCCUPANCIES, starting_square));
temp_attack = ((queenAttacks.and(BLACK_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard)));
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_CAPTURE;
move_list[move_count][MOVE_PIECE] = GenConst.BQ;
move_count++;
}
temp_attack = ((queenAttacks.and(EMPTY_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard)));
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_NONE;
move_list[move_count][MOVE_PIECE] = GenConst.BQ;
move_count++;
}
}
//#endregion
}
}
//#endregion
Pr.println("-generated moves, count: " + move_count);
return move_count;
}
static int PerftInlineDebug(int depth, int ply)
{
if (depth == 0)
{
return 1;
}
BigInteger[] bitboard_array_copy = new BigInteger[12];
for (int i = 0; i < 12; i++)
{
bitboard_array_copy[i] = Board.bitboard_array_global[i];
}
int[][] move_list = new int[250][4];
int move_count = getMoves(move_list);
// Pr.print("Move count: ");
// Pr.printIntLn(move_count);
//if (depth == 1)
//{
//return move_count;
//}
int nodes = 0;
int priorNodes;
int copyEp = Board.ep;
boolean[] copy_castle = {
Board.castle_rights_global[0],
Board.castle_rights_global[1],
Board.castle_rights_global[2],
Board.castle_rights_global[3],
};
Pr.println(" -Looping through moves");
for (int move_index = 0; move_index < move_count; move_index++)
{
int startingSquare = move_list[move_index][MOVE_STARTING];
int targetSquare = move_list[move_index][MOVE_TARGET];
int piece = move_list[move_index][MOVE_PIECE];
int tag = move_list[move_index][MOVE_TAG];
int captureIndex = makeMove(piece, tag, startingSquare, targetSquare);
priorNodes = nodes;
nodes += PerftInlineDebug(depth - 1, ply + 1);
unmakeMove(piece, tag, startingSquare, targetSquare, captureIndex);
Board.castle_rights_global[0] = copy_castle[0];
Board.castle_rights_global[1] = copy_castle[1];
Board.castle_rights_global[2] = copy_castle[2];
Board.castle_rights_global[3] = copy_castle[3];
Board.ep = copyEp;
for (int i = 0; i < 12; i++)
{
Pr.println("i: " + i + " bitboard: " + Board.bitboard_array_global[i]);
assert Board.bitboard_array_global[i] == bitboard_array_copy[i] : "Bitboards are not the same!";
}
if (ply == 0)
{
//Pr.printInt(startingSquare);
//Pr.printInt(targetSquare);
//Pr.printInt(tag);
PrintMoveNoNL(startingSquare, targetSquare, tag);
System.out.printf(": %d\n", nodes - priorNodes);
}
}
return nodes;
}
static int PerftInlineGlobal(int depth, int ply)
{
if (depth == 0)
{
return 1;
}
int[][] move_list = new int[250][4];
int move_count = 0;
//Move generating variables
BigInteger WHITE_OCCUPANCIES = Board.bitboard_array_global[0]
.or(Board.bitboard_array_global[1])
.or(Board.bitboard_array_global[2])
.or(Board.bitboard_array_global[3])
.or(Board.bitboard_array_global[4])
.or(Board.bitboard_array_global[5]);
BigInteger BLACK_OCCUPANCIES = Board.bitboard_array_global[6]
.or(Board.bitboard_array_global[7])
.or(Board.bitboard_array_global[8])
.or(Board.bitboard_array_global[9])
.or(Board.bitboard_array_global[10])
.or(Board.bitboard_array_global[11]);
BigInteger COMBINED_OCCUPANCIES = WHITE_OCCUPANCIES.or(BLACK_OCCUPANCIES);
BigInteger EMPTY_OCCUPANCIES = COMBINED_OCCUPANCIES.not();
BigInteger temp_bitboard, temp_pin_bitboard, temp_attack, temp_empty, temp_captures;
BigInteger check_bitboard = new BigInteger("0");
int starting_square = NO_SQUARE, target_square = NO_SQUARE;
int[][] pinArray =
{
{ -1, -1 },
{ -1, -1 },
{ -1, -1 },
{ -1, -1 },
{ -1, -1 },
{ -1, -1 },
{ -1, -1 },
{ -1, -1 },
};
int pinNumber = 0;
if (Board.is_white_global == true)
{
int whiteKingCheckCount = 0;
int whiteKingPosition = BitScanForward(Board.bitboard_array_global[GenConst.WK]);
//#region White checks and pins
//pawns
temp_bitboard = Board.bitboard_array_global[GenConst.BP].and(MoveConstants.WHITE_PAWN_ATTACKS[whiteKingPosition]);
if (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
int pawn_square = BitScanForward(temp_bitboard);
if (check_bitboard.compareTo(BigInteger.ZERO) != 0)
{
check_bitboard = MoveConstants.SQUARE_BBS[pawn_square];
}
whiteKingCheckCount++;
}
//knights
temp_bitboard = Board.bitboard_array_global[GenConst.BN].and(MoveConstants.KNIGHT_ATTACKS[whiteKingPosition]);
if (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
int knight_square = BitScanForward(temp_bitboard);
if (check_bitboard.compareTo(BigInteger.ZERO) != 0)
{
check_bitboard = MoveConstants.SQUARE_BBS[knight_square];
}
whiteKingCheckCount++;
}
//bishops
BigInteger bishopAttacksChecks = MoveUtils.GetBishopMovesSeparate(BLACK_OCCUPANCIES, whiteKingPosition);
temp_bitboard = Board.bitboard_array_global[GenConst.BB].and(bishopAttacksChecks);
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
int piece_square = BitScanForward(temp_bitboard);
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[whiteKingPosition][piece_square].and(WHITE_OCCUPANCIES);
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
if (check_bitboard.compareTo(BigInteger.ZERO) != 0)
{
check_bitboard = Inb.INBETWEEN_BITBOARDS[whiteKingPosition][piece_square];
}
whiteKingCheckCount++;
}
else
{
int pinned_square = BitScanForward(temp_pin_bitboard);
temp_pin_bitboard = temp_pin_bitboard.and(temp_pin_bitboard.subtract(BigInteger.ONE));
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
pinArray[pinNumber][PINNED_SQUARE_INDEX] = pinned_square;
pinArray[pinNumber][PINNING_PIECE_INDEX] = piece_square;
pinNumber++;
}
}
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
}
//queen
temp_bitboard = Board.bitboard_array_global[GenConst.BQ].and(bishopAttacksChecks);
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
int piece_square = BitScanForward(temp_bitboard);
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[whiteKingPosition][piece_square].and(WHITE_OCCUPANCIES);
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
if (check_bitboard.compareTo(BigInteger.ZERO) != 0)
{
check_bitboard = Inb.INBETWEEN_BITBOARDS[whiteKingPosition][piece_square];
}
whiteKingCheckCount++;
}
else
{
int pinned_square = BitScanForward(temp_pin_bitboard);
temp_pin_bitboard = temp_pin_bitboard.and(temp_pin_bitboard.subtract(BigInteger.ONE));
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
pinArray[pinNumber][PINNED_SQUARE_INDEX] = pinned_square;
pinArray[pinNumber][PINNING_PIECE_INDEX] = piece_square;
pinNumber++;
}
}
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
}
//rook
BigInteger rook_attacks = MoveUtils.GetRookMovesSeparate(BLACK_OCCUPANCIES, whiteKingPosition);
temp_bitboard = Board.bitboard_array_global[GenConst.BR].and(rook_attacks);
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
int piece_square = BitScanForward(temp_bitboard);
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[whiteKingPosition][piece_square].and(WHITE_OCCUPANCIES);
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
if (check_bitboard.compareTo(BigInteger.ZERO) != 0)
{
check_bitboard = Inb.INBETWEEN_BITBOARDS[whiteKingPosition][piece_square];
}
whiteKingCheckCount++;
}
else
{
int pinned_square = BitScanForward(temp_pin_bitboard);
temp_pin_bitboard = temp_pin_bitboard.and(temp_pin_bitboard.subtract(BigInteger.ONE));
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
pinArray[pinNumber][PINNED_SQUARE_INDEX] = pinned_square;
pinArray[pinNumber][PINNING_PIECE_INDEX] = piece_square;
pinNumber++;
}
}
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
}
//queen
temp_bitboard = Board.bitboard_array_global[GenConst.BQ].and(rook_attacks);
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
int piece_square = BitScanForward(temp_bitboard);
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[whiteKingPosition][piece_square].and(WHITE_OCCUPANCIES);
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
if (check_bitboard.compareTo(BigInteger.ZERO) != 0)
{
check_bitboard = Inb.INBETWEEN_BITBOARDS[whiteKingPosition][piece_square];
}
whiteKingCheckCount++;
}
else
{
int pinned_square = BitScanForward(temp_pin_bitboard);
temp_pin_bitboard = temp_pin_bitboard.and(temp_pin_bitboard.subtract(BigInteger.ONE));
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
pinArray[pinNumber][PINNED_SQUARE_INDEX] = pinned_square;
pinArray[pinNumber][PINNING_PIECE_INDEX] = piece_square;
pinNumber++;
}
}
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
}
//#endregion
BigInteger occupanciesWithoutWhiteKing = COMBINED_OCCUPANCIES.and(Board.bitboard_array_global[GenConst.WK].not());
temp_attack = MoveConstants.KING_ATTACKS[whiteKingPosition];
temp_empty = temp_attack.and(EMPTY_OCCUPANCIES);
while (temp_empty.signum() != 0) // Using BigInteger's signum() to check if it's not 0
{
target_square = BitScanForward(temp_empty);
temp_empty = temp_empty.and(temp_empty.subtract(BigInteger.ONE)); // Using BigInteger's subtract and and
if (Board.bitboard_array_global[GenConst.BP].and(MoveConstants.WHITE_PAWN_ATTACKS[target_square]).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.BN].and(MoveConstants.KNIGHT_ATTACKS[target_square]).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.BK].and(MoveConstants.KING_ATTACKS[target_square]).signum() != 0) {
continue;
}
BigInteger bishopAttacks = MoveUtils.GetBishopMovesSeparate(occupanciesWithoutWhiteKing, target_square);
if (Board.bitboard_array_global[GenConst.BB].and(bishopAttacks).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.BQ].and(bishopAttacks).signum() != 0) {
continue;
}
BigInteger rookAttacks = MoveUtils.GetRookMovesSeparate(occupanciesWithoutWhiteKing, target_square);
if (Board.bitboard_array_global[GenConst.BR].and(rookAttacks).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.BQ].and(rookAttacks).signum() != 0) {
continue;
}
move_list[move_count][MOVE_STARTING] = whiteKingPosition;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_NONE;
move_list[move_count][MOVE_PIECE] = GenConst.WK;
move_count++;
}
//captures
temp_captures = temp_attack.and(BLACK_OCCUPANCIES);
while (temp_captures.signum() != 0) // Using BigInteger's signum() to check if it's not 0
{
target_square = BitScanForward(temp_captures);
temp_captures = temp_captures.and(temp_captures.subtract(BigInteger.ONE)); // Using BigInteger's subtract and and
if (Board.bitboard_array_global[GenConst.BP].and(MoveConstants.WHITE_PAWN_ATTACKS[target_square]).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.BN].and(MoveConstants.KNIGHT_ATTACKS[target_square]).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.BK].and(MoveConstants.KING_ATTACKS[target_square]).signum() != 0) {
continue;
}
BigInteger bishopAttacks = MoveUtils.GetBishopMovesSeparate(occupanciesWithoutWhiteKing, target_square);
if (Board.bitboard_array_global[GenConst.BB].and(bishopAttacks).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.BQ].and(bishopAttacks).signum() != 0) {
continue;
}
BigInteger rookAttacks = MoveUtils.GetRookMovesSeparate(occupanciesWithoutWhiteKing, target_square);
if (Board.bitboard_array_global[GenConst.BR].and(rookAttacks).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.BQ].and(rookAttacks).signum() != 0) {
continue;
}
move_list[move_count][MOVE_STARTING] = whiteKingPosition;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_CAPTURE;
move_list[move_count][MOVE_PIECE] = GenConst.WK;
move_count++;
}
if (whiteKingCheckCount < 2)
{
if (whiteKingCheckCount == 0)
{
check_bitboard = MAX_ULONG;
}
//#region White castling
if (whiteKingCheckCount == 0)
{
if (Board.castle_rights_global[WKS_CASTLE_RIGHTS] == true)
{
if (whiteKingPosition == GenConst.E1) //king on e1
{
if (isNotZero(WKS_EMPTY_BITBOARD.and(COMBINED_OCCUPANCIES)) == false) //f1 and g1 empty
{
if (isNotZero(Board.bitboard_array_global[GenConst.WR].and(MoveConstants.SQUARE_BBS[GenConst.H1])) == false) //rook on h1
{
if (MoveUtils.Is_Square_Attacked_By_Black_Global(GenConst.F1, COMBINED_OCCUPANCIES) == false)
{
if (MoveUtils.Is_Square_Attacked_By_Black_Global(GenConst.G1, COMBINED_OCCUPANCIES) == false)
{
move_list[move_count][MOVE_STARTING] = GenConst.E1;
move_list[move_count][MOVE_TARGET] = GenConst.G1;
move_list[move_count][MOVE_TAG] = GenConst.TAG_WCASTLEKS;
move_list[move_count][MOVE_PIECE] = GenConst.WK;
move_count++;
}
}
}
}
}
}
if (Board.castle_rights_global[WQS_CASTLE_RIGHTS] == true)
{
if (whiteKingPosition == GenConst.E1) //king on e1
{
if (isNotZero(WQS_EMPTY_BITBOARD.and(COMBINED_OCCUPANCIES)) == false) //f1 and g1 empty
{
if ((isNotZero(Board.bitboard_array_global[GenConst.WR].and(MoveConstants.SQUARE_BBS[GenConst.A1]))) == true) //rook on h1
{
if (MoveUtils.Is_Square_Attacked_By_Black_Global(GenConst.C1, COMBINED_OCCUPANCIES) == false)
{
if (MoveUtils.Is_Square_Attacked_By_Black_Global(GenConst.D1, COMBINED_OCCUPANCIES) == false)
{
move_list[move_count][MOVE_STARTING] = GenConst.E1;
move_list[move_count][MOVE_TARGET] = GenConst.C1;
move_list[move_count][MOVE_TAG] = GenConst.TAG_WCASTLEQS;
move_list[move_count][MOVE_PIECE] = GenConst.WK;
move_count++;
}
}
}
}
}
}
}
//#endregion
//#region White knight moves
temp_bitboard = Board.bitboard_array_global[GenConst.WN];
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
starting_square = BitScanForward(temp_bitboard);
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE)); //removes the knight from that square to not infinitely loop
temp_pin_bitboard = MAX_ULONG;
if (pinNumber != 0)
{
for (int i = 0; i < pinNumber; i++)
{
if (pinArray[i][PINNED_SQUARE_INDEX] == starting_square)
{
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[whiteKingPosition][pinArray[i][PINNING_PIECE_INDEX]];
}
}
}
temp_attack = ((MoveConstants.KNIGHT_ATTACKS[starting_square].and(BLACK_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard))); //gets knight captures
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_CAPTURE;
move_list[move_count][MOVE_PIECE] = GenConst.WN;
move_count++;
}
temp_attack = ((MoveConstants.KNIGHT_ATTACKS[starting_square].and(EMPTY_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard)));
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_NONE;
move_list[move_count][MOVE_PIECE] = GenConst.WN;
move_count++;
}
}
//#endregion
//#region White pawn moves
temp_bitboard = Board.bitboard_array_global[GenConst.WP];
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
starting_square = BitScanForward(temp_bitboard);
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
temp_pin_bitboard = MAX_ULONG;
if (pinNumber != 0)
{
for (int i = 0; i < pinNumber; i++)
{
if (pinArray[i][PINNED_SQUARE_INDEX] == starting_square)
{
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[whiteKingPosition][pinArray[i][PINNING_PIECE_INDEX]];
}
}
}
//#region pawn forward
if (isZero(MoveConstants.SQUARE_BBS[starting_square - 8].and(COMBINED_OCCUPANCIES)) == true) //if up one square is empty
{
if (isNotZero(MoveConstants.SQUARE_BBS[starting_square - 8].and(check_bitboard).and(temp_pin_bitboard)) == true) //if not pinned or check
{
if (isNotZero(MoveConstants.SQUARE_BBS[starting_square].and(RANK_7_BITBOARD))) //if promotion
{
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = starting_square - 8;
move_list[move_count][MOVE_TAG] = GenConst.TAG_WQueenPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.WP;
move_count++;
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = starting_square - 8;
move_list[move_count][MOVE_TAG] = GenConst.TAG_WRookPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.WP;
move_count++;
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = starting_square - 8;
move_list[move_count][MOVE_TAG] = GenConst.TAG_WBishopPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.WP;
move_count++;
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = starting_square - 8;
move_list[move_count][MOVE_TAG] = GenConst.TAG_WBishopPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.WP;
move_count++;
}
else
{
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = starting_square - 8;
move_list[move_count][MOVE_TAG] = GenConst.TAG_NONE;
move_list[move_count][MOVE_PIECE] = GenConst.WP;
move_count++;
}
}
if ((isNotZero(MoveConstants.SQUARE_BBS[starting_square].and(RANK_2_BITBOARD))) == true) //if on rank 2
{
if (isNotZero(MoveConstants.SQUARE_BBS[starting_square - 16].and(check_bitboard).and(temp_pin_bitboard)) == true) //if not pinned or
{
if (isZero(MoveConstants.SQUARE_BBS[starting_square - 16].and(COMBINED_OCCUPANCIES)) == true) //if up two squares and one square are empty
{
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = starting_square - 16;
move_list[move_count][MOVE_TAG] = GenConst.TAG_DoublePawnWhite;
move_list[move_count][MOVE_PIECE] = GenConst.WP;
move_count++;
}
}
}
}
//#endregion
//#region pawn attacks
temp_attack = ((MoveConstants.WHITE_PAWN_ATTACKS[starting_square].and(BLACK_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard))); //if black piece diagonal to pawn
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
if (isNotZero(MoveConstants.SQUARE_BBS[starting_square].and(RANK_7_BITBOARD)) == true) //if promotion
{
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_WCaptureQueenPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.WP;
move_count++;
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_WCaptureRookPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.WP;
move_count++;
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_WCaptureBishopPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.WP;
move_count++;
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_WCaptureKnightPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.WP;
move_count++;
}
else
{
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_CAPTURE;
move_list[move_count][MOVE_PIECE] = GenConst.WP;
move_count++;
}
}
if (isNotZero(MoveConstants.SQUARE_BBS[starting_square].and(RANK_5_BITBOARD)))
{ // check rank for ep
if (Board.ep != NO_SQUARE)
{
if (isNotZero(MoveConstants.WHITE_PAWN_ATTACKS[starting_square]
.and(MoveConstants.SQUARE_BBS[Board.ep])
.and(check_bitboard)
.and(temp_pin_bitboard))) {
if (isZero(Board.bitboard_array_global[GenConst.WK].and(RANK_5_BITBOARD))) { // if no king on rank 5
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = Board.ep;
move_list[move_count][MOVE_TAG] = GenConst.TAG_WHITEEP;
move_list[move_count][MOVE_PIECE] = GenConst.WP;
move_count++;
} else if (isZero(Board.bitboard_array_global[GenConst.BR].and(RANK_5_BITBOARD)) &&
isZero(Board.bitboard_array_global[GenConst.BQ].and(RANK_5_BITBOARD))) { // if no b rook or queen on rank 5
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = Board.ep;
move_list[move_count][MOVE_TAG] = GenConst.TAG_WHITEEP;
move_list[move_count][MOVE_PIECE] = GenConst.WP;
move_count++;
} else { // wk and br or bq on rank 5
BigInteger occupancyWithoutEPPawns = COMBINED_OCCUPANCIES.and(MoveConstants.SQUARE_BBS[starting_square].not());
occupancyWithoutEPPawns = occupancyWithoutEPPawns.and(MoveConstants.SQUARE_BBS[Board.ep + 8].not());
BigInteger rookAttacksFromKing = MoveUtils.GetRookMovesSeparate(occupancyWithoutEPPawns, whiteKingPosition);
if (isZero(rookAttacksFromKing.and(Board.bitboard_array_global[GenConst.BR])))
{
if (isZero(rookAttacksFromKing.and(Board.bitboard_array_global[GenConst.BQ])))
{
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = Board.ep;
move_list[move_count][MOVE_TAG] = GenConst.TAG_WHITEEP;
move_list[move_count][MOVE_PIECE] = GenConst.WP;
move_count++;
}
}
}
}
}
}
//#endregion
}
//#endregion
//#region White rook moves
temp_bitboard = Board.bitboard_array_global[GenConst.WR];
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
starting_square = BitScanForward(temp_bitboard);
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
temp_pin_bitboard = MAX_ULONG;
if (pinNumber != 0)
{
for (int i = 0; i < pinNumber; i++)
{
if (pinArray[i][PINNED_SQUARE_INDEX] == starting_square)
{
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[whiteKingPosition][pinArray[i][PINNING_PIECE_INDEX]];
}
}
}
BigInteger rookAttacks = MoveUtils.GetRookMovesSeparate(COMBINED_OCCUPANCIES, starting_square);
temp_attack = ((rookAttacks.and(BLACK_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard)));
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_CAPTURE;
move_list[move_count][MOVE_PIECE] = GenConst.WR;
move_count++;
}
temp_attack = ((rookAttacks.and(EMPTY_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard)));
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_NONE;
move_list[move_count][MOVE_PIECE] = GenConst.WR;
move_count++;
}
}
//#endregion
//#region White bishop moves
//Pr.println("\nwhite bishop");
temp_bitboard = Board.bitboard_array_global[GenConst.WB];
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
starting_square = BitScanForward(temp_bitboard);
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
temp_pin_bitboard = MAX_ULONG;
if (pinNumber != 0)
{
for (int i = 0; i < pinNumber; i++)
{
if (pinArray[i][PINNED_SQUARE_INDEX] == starting_square)
{
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[whiteKingPosition][pinArray[i][PINNING_PIECE_INDEX]];
}
}
}
//Pr.println("get bishop attacks");
BigInteger bishopAttacks = MoveUtils.GetBishopMovesSeparate(COMBINED_OCCUPANCIES, starting_square);
//Pr.println("bishop attacks");
//Pr.printBigIntegerLn(bishopAttacks);
temp_attack = ((bishopAttacks.and(BLACK_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard)));
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_CAPTURE;
move_list[move_count][MOVE_PIECE] = GenConst.WB;
move_count++;
}
temp_attack = ((bishopAttacks.and(EMPTY_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard)));
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_NONE;
move_list[move_count][MOVE_PIECE] = GenConst.WB;
move_count++;
}
}
//#endregion
//#region White queen moves
temp_bitboard = Board.bitboard_array_global[GenConst.WQ];
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
starting_square = BitScanForward(temp_bitboard);
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
temp_pin_bitboard = MAX_ULONG;
if (pinNumber != 0)
{
for (int i = 0; i < pinNumber; i++)
{
if (pinArray[i][PINNED_SQUARE_INDEX] == starting_square)
{
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[whiteKingPosition][pinArray[i][PINNING_PIECE_INDEX]];
}
}
}
BigInteger queenAttacks = MoveUtils.GetRookMovesSeparate(COMBINED_OCCUPANCIES, starting_square);
queenAttacks = queenAttacks.and(MoveUtils.GetBishopMovesSeparate(COMBINED_OCCUPANCIES, starting_square));
temp_attack = ((queenAttacks.and(BLACK_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard)));
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_CAPTURE;
move_list[move_count][MOVE_PIECE] = GenConst.WQ;
move_count++;
}
temp_attack = ((queenAttacks.and(EMPTY_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard)));
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_NONE;
move_list[move_count][MOVE_PIECE] = GenConst.WQ;
move_count++;
}
}
//#endregion
}
}
else //black move
{
int blackKingCheckCount = 0;
int blackKingPosition = BitScanForward(Board.bitboard_array_global[GenConst.BK]);
//#region black checks and pins
//pawns
temp_bitboard = Board.bitboard_array_global[GenConst.WP].and(MoveConstants.BLACK_PAWN_ATTACKS[blackKingPosition]);
if (temp_bitboard.compareTo(BigInteger.ZERO) != 0) //if there is pawn attacking king
{
int pawn_square = BitScanForward(temp_bitboard);
if (check_bitboard.compareTo(BigInteger.ZERO) != 0)
{
check_bitboard = MoveConstants.SQUARE_BBS[pawn_square];
}
blackKingCheckCount++;
}
//knights
temp_bitboard = Board.bitboard_array_global[GenConst.WN].and(MoveConstants.KNIGHT_ATTACKS[blackKingPosition]);
if (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
int knight_square = BitScanForward(temp_bitboard);
if (check_bitboard.compareTo(BigInteger.ZERO) != 0)
{
check_bitboard = MoveConstants.SQUARE_BBS[knight_square];
}
blackKingCheckCount++;
}
//bishops
BigInteger bishopAttacksChecks = MoveUtils.GetBishopMovesSeparate(WHITE_OCCUPANCIES, blackKingPosition);
temp_bitboard = Board.bitboard_array_global[GenConst.WB].and(bishopAttacksChecks);
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
int piece_square = BitScanForward(temp_bitboard);
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[blackKingPosition][piece_square].and(BLACK_OCCUPANCIES);
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
if (check_bitboard.compareTo(BigInteger.ZERO) != 0)
{
check_bitboard = Inb.INBETWEEN_BITBOARDS[blackKingPosition][piece_square];
}
blackKingCheckCount++;
}
else
{
int pinned_square = BitScanForward(temp_pin_bitboard);
temp_pin_bitboard = temp_pin_bitboard.and(temp_pin_bitboard.subtract(BigInteger.ONE));
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
pinArray[pinNumber][PINNED_SQUARE_INDEX] = pinned_square;
pinArray[pinNumber][PINNING_PIECE_INDEX] = piece_square;
pinNumber++;
}
}
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
}
//queen
temp_bitboard = Board.bitboard_array_global[GenConst.WQ].and(bishopAttacksChecks);
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
int piece_square = BitScanForward(temp_bitboard);
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[blackKingPosition][piece_square].and(BLACK_OCCUPANCIES);
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
if (check_bitboard.compareTo(BigInteger.ZERO) != 0)
{
check_bitboard = Inb.INBETWEEN_BITBOARDS[blackKingPosition][piece_square];
}
blackKingCheckCount++;
}
else
{
int pinned_square = BitScanForward(temp_pin_bitboard);
temp_pin_bitboard = temp_pin_bitboard.and(temp_pin_bitboard.subtract(BigInteger.ONE));
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
pinArray[pinNumber][PINNED_SQUARE_INDEX] = pinned_square;
pinArray[pinNumber][PINNING_PIECE_INDEX] = piece_square;
pinNumber++;
}
}
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
}
//rook
BigInteger rook_attacks = MoveUtils.GetRookMovesSeparate(WHITE_OCCUPANCIES, blackKingPosition);
temp_bitboard = Board.bitboard_array_global[GenConst.WR].and(rook_attacks);
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
int piece_square = BitScanForward(temp_bitboard);
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[blackKingPosition][piece_square].and(BLACK_OCCUPANCIES);
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
if (check_bitboard.compareTo(BigInteger.ZERO) != 0)
{
check_bitboard = Inb.INBETWEEN_BITBOARDS[blackKingPosition][piece_square];
}
blackKingCheckCount++;
}
else
{
int pinned_square = BitScanForward(temp_pin_bitboard);
temp_pin_bitboard = temp_pin_bitboard.and(temp_pin_bitboard.subtract(BigInteger.ONE));
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
pinArray[pinNumber][PINNED_SQUARE_INDEX] = pinned_square;
pinArray[pinNumber][PINNING_PIECE_INDEX] = piece_square;
pinNumber++;
}
}
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
}
//queen
temp_bitboard = Board.bitboard_array_global[GenConst.WQ].and(rook_attacks);
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
int piece_square = BitScanForward(temp_bitboard);
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[blackKingPosition][piece_square].and(WHITE_OCCUPANCIES);
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
if (check_bitboard.compareTo(BigInteger.ZERO) != 0)
{
check_bitboard = Inb.INBETWEEN_BITBOARDS[blackKingPosition][piece_square];
}
blackKingCheckCount++;
}
else
{
int pinned_square = BitScanForward(temp_pin_bitboard);
temp_pin_bitboard = temp_pin_bitboard.and(temp_pin_bitboard.subtract(BigInteger.ONE));
if (temp_pin_bitboard.compareTo(BigInteger.ZERO) != 0)
{
pinArray[pinNumber][PINNED_SQUARE_INDEX] = pinned_square;
pinArray[pinNumber][PINNING_PIECE_INDEX] = piece_square;
pinNumber++;
}
}
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
}
//#endregion
BigInteger occupanciesWithoutWhiteKing = COMBINED_OCCUPANCIES.and(Board.bitboard_array_global[GenConst.WK].not());
temp_attack = MoveConstants.KING_ATTACKS[blackKingPosition];
temp_empty = temp_attack.and(EMPTY_OCCUPANCIES);
while (temp_empty.signum() != 0) // Using BigInteger's signum() to check if it's not 0
{
target_square = BitScanForward(temp_empty);
temp_empty = temp_empty.and(temp_empty.subtract(BigInteger.ONE)); // Using BigInteger's subtract and and
if (Board.bitboard_array_global[GenConst.WP].and(MoveConstants.BLACK_PAWN_ATTACKS[target_square]).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.WN].and(MoveConstants.KNIGHT_ATTACKS[target_square]).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.WK].and(MoveConstants.KING_ATTACKS[target_square]).signum() != 0) {
continue;
}
BigInteger bishopAttacks = MoveUtils.GetBishopMovesSeparate(occupanciesWithoutWhiteKing, target_square);
if (Board.bitboard_array_global[GenConst.WB].and(bishopAttacks).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.WQ].and(bishopAttacks).signum() != 0) {
continue;
}
BigInteger rookAttacks = MoveUtils.GetRookMovesSeparate(occupanciesWithoutWhiteKing, target_square);
if (Board.bitboard_array_global[GenConst.WR].and(rookAttacks).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.WQ].and(rookAttacks).signum() != 0) {
continue;
}
move_list[move_count][MOVE_STARTING] = blackKingPosition;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_NONE;
move_list[move_count][MOVE_PIECE] = GenConst.BK;
move_count++;
}
//captures
temp_captures = temp_attack.and(BLACK_OCCUPANCIES);
while (temp_captures.signum() != 0) // Using BigInteger's signum() to check if it's not 0
{
target_square = BitScanForward(temp_captures);
temp_captures = temp_captures.and(temp_captures.subtract(BigInteger.ONE)); // Using BigInteger's subtract and and
if (Board.bitboard_array_global[GenConst.WP].and(MoveConstants.BLACK_PAWN_ATTACKS[target_square]).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.WN].and(MoveConstants.KNIGHT_ATTACKS[target_square]).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.WK].and(MoveConstants.KING_ATTACKS[target_square]).signum() != 0) {
continue;
}
BigInteger bishopAttacks = MoveUtils.GetBishopMovesSeparate(occupanciesWithoutWhiteKing, target_square);
if (Board.bitboard_array_global[GenConst.WB].and(bishopAttacks).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.WQ].and(bishopAttacks).signum() != 0) {
continue;
}
BigInteger rookAttacks = MoveUtils.GetRookMovesSeparate(occupanciesWithoutWhiteKing, target_square);
if (Board.bitboard_array_global[GenConst.WR].and(rookAttacks).signum() != 0) {
continue;
}
if (Board.bitboard_array_global[GenConst.WQ].and(rookAttacks).signum() != 0) {
continue;
}
move_list[move_count][MOVE_STARTING] = blackKingPosition;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_CAPTURE;
move_list[move_count][MOVE_PIECE] = GenConst.BK;
move_count++;
}
if (blackKingCheckCount < 2)
{
if (blackKingCheckCount == 0)
{
check_bitboard = MAX_ULONG;
}
//#region Black castling
if (blackKingCheckCount == 0)
{
if (Board.castle_rights_global[BKS_CASTLE_RIGHTS] == true)
{
if (blackKingPosition == GenConst.E8) //king on e1
{
if (isNotZero(BKS_EMPTY_BITBOARD.and(COMBINED_OCCUPANCIES)) == false) //f1 and g1 empty
{
if (isNotZero(Board.bitboard_array_global[GenConst.BR].and(MoveConstants.SQUARE_BBS[GenConst.H8])) == false) //rook on h8
{
if (MoveUtils.Is_Square_Attacked_By_White_Global(GenConst.F8, COMBINED_OCCUPANCIES) == false)
{
if (MoveUtils.Is_Square_Attacked_By_White_Global(GenConst.G8, COMBINED_OCCUPANCIES) == false)
{
move_list[move_count][MOVE_STARTING] = GenConst.E8;
move_list[move_count][MOVE_TARGET] = GenConst.G8;
move_list[move_count][MOVE_TAG] = GenConst.TAG_BCASTLEKS;
move_list[move_count][MOVE_PIECE] = GenConst.BK;
move_count++;
}
}
}
}
}
}
if (Board.castle_rights_global[BQS_CASTLE_RIGHTS] == true)
{
if (blackKingPosition == GenConst.E8) //king on e1
{
if (isNotZero(BQS_EMPTY_BITBOARD.and(COMBINED_OCCUPANCIES)) == false) //f1 and g1 empty
{
if ((isNotZero(Board.bitboard_array_global[GenConst.BR].and(MoveConstants.SQUARE_BBS[GenConst.A8]))) == true) //rook on h1
{
if (MoveUtils.Is_Square_Attacked_By_White_Global(GenConst.C8, COMBINED_OCCUPANCIES) == false)
{
if (MoveUtils.Is_Square_Attacked_By_White_Global(GenConst.D8, COMBINED_OCCUPANCIES) == false)
{
move_list[move_count][MOVE_STARTING] = GenConst.E8;
move_list[move_count][MOVE_TARGET] = GenConst.C8;
move_list[move_count][MOVE_TAG] = GenConst.TAG_BCASTLEQS;
move_list[move_count][MOVE_PIECE] = GenConst.BK;
move_count++;
}
}
}
}
}
}
}
//#endregion
//#region Black knight moves
temp_bitboard = Board.bitboard_array_global[GenConst.BN];
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
starting_square = BitScanForward(temp_bitboard);
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE)); //removes the knight from that square to not infinitely loop
temp_pin_bitboard = MAX_ULONG;
if (pinNumber != 0)
{
for (int i = 0; i < pinNumber; i++)
{
if (pinArray[i][PINNED_SQUARE_INDEX] == starting_square)
{
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[blackKingPosition][pinArray[i][PINNING_PIECE_INDEX]];
}
}
}
temp_attack = ((MoveConstants.KNIGHT_ATTACKS[starting_square].and(WHITE_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard))); //gets knight captures
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_CAPTURE;
move_list[move_count][MOVE_PIECE] = GenConst.BN;
move_count++;
}
temp_attack = ((MoveConstants.KNIGHT_ATTACKS[starting_square].and(EMPTY_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard)));
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_NONE;
move_list[move_count][MOVE_PIECE] = GenConst.BN;
move_count++;
}
}
//#endregion
//#region Black pawn moves
temp_bitboard = Board.bitboard_array_global[GenConst.BP];
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
starting_square = BitScanForward(temp_bitboard);
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
temp_pin_bitboard = MAX_ULONG;
if (pinNumber != 0)
{
for (int i = 0; i < pinNumber; i++)
{
if (pinArray[i][PINNED_SQUARE_INDEX] == starting_square)
{
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[blackKingPosition][pinArray[i][PINNING_PIECE_INDEX]];
}
}
}
//#region pawn forward
if (isZero(MoveConstants.SQUARE_BBS[starting_square + 8].and(COMBINED_OCCUPANCIES)) == true) //if up one square is empty
{
if (isNotZero(MoveConstants.SQUARE_BBS[starting_square + 8].and(check_bitboard).and(temp_pin_bitboard)) == true) //if not pinned or check
{
if (isNotZero(MoveConstants.SQUARE_BBS[starting_square].and(RANK_2_BITBOARD))) //if promotion
{
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = starting_square + 8;
move_list[move_count][MOVE_TAG] = GenConst.TAG_BQueenPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.BP;
move_count++;
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = starting_square + 8;
move_list[move_count][MOVE_TAG] = GenConst.TAG_BRookPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.BP;
move_count++;
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = starting_square + 8;
move_list[move_count][MOVE_TAG] = GenConst.TAG_BBishopPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.BP;
move_count++;
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = starting_square + 8;
move_list[move_count][MOVE_TAG] = GenConst.TAG_BBishopPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.BP;
move_count++;
}
else
{
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = starting_square + 8;
move_list[move_count][MOVE_TAG] = GenConst.TAG_NONE;
move_list[move_count][MOVE_PIECE] = GenConst.BP;
move_count++;
}
}
if ((isNotZero(MoveConstants.SQUARE_BBS[starting_square].and(RANK_7_BITBOARD))) == true) //if on rank 7
{
if (isNotZero(MoveConstants.SQUARE_BBS[starting_square + 16].and(check_bitboard).and(temp_pin_bitboard)) == true) //if not pinned or
{
if (isZero(MoveConstants.SQUARE_BBS[starting_square + 16].and(COMBINED_OCCUPANCIES)) == true) //if up two squares and one square are empty
{
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = starting_square - 16;
move_list[move_count][MOVE_TAG] = GenConst.TAG_DoublePawnBlack;
move_list[move_count][MOVE_PIECE] = GenConst.BP;
move_count++;
}
}
}
}
//#endregion
//#region pawn attacks
temp_attack = ((MoveConstants.BLACK_PAWN_ATTACKS[starting_square].and(BLACK_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard))); //if black piece diagonal to pawn
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
if (isNotZero(MoveConstants.SQUARE_BBS[starting_square].and(RANK_2_BITBOARD)) == true) //if promotion
{
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_BCaptureQueenPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.BP;
move_count++;
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_BCaptureRookPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.BP;
move_count++;
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_BCaptureBishopPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.BP;
move_count++;
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_BCaptureKnightPromotion;
move_list[move_count][MOVE_PIECE] = GenConst.BP;
move_count++;
}
else
{
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_CAPTURE;
move_list[move_count][MOVE_PIECE] = GenConst.BP;
move_count++;
}
}
if (isNotZero(MoveConstants.SQUARE_BBS[starting_square].and(RANK_4_BITBOARD)))
{ // check rank for ep
if (Board.ep != NO_SQUARE)
{
if (isNotZero(MoveConstants.BLACK_PAWN_ATTACKS[starting_square]
.and(MoveConstants.SQUARE_BBS[Board.ep])
.and(check_bitboard)
.and(temp_pin_bitboard))) {
if (isZero(Board.bitboard_array_global[GenConst.WK].and(RANK_5_BITBOARD))) { // if no king on rank 5
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = Board.ep;
move_list[move_count][MOVE_TAG] = GenConst.TAG_BLACKEP;
move_list[move_count][MOVE_PIECE] = GenConst.BP;
move_count++;
} else if (isZero(Board.bitboard_array_global[GenConst.WR].and(RANK_5_BITBOARD)) &&
isZero(Board.bitboard_array_global[GenConst.WQ].and(RANK_5_BITBOARD))) { // if no b rook or queen on rank 5
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = Board.ep;
move_list[move_count][MOVE_TAG] = GenConst.TAG_BLACKEP;
move_list[move_count][MOVE_PIECE] = GenConst.BP;
move_count++;
} else { // wk and br or bq on rank 5
BigInteger occupancyWithoutEPPawns = COMBINED_OCCUPANCIES.and(MoveConstants.SQUARE_BBS[starting_square].not());
occupancyWithoutEPPawns = occupancyWithoutEPPawns.and(MoveConstants.SQUARE_BBS[Board.ep - 8].not());
BigInteger rookAttacksFromKing = MoveUtils.GetRookMovesSeparate(occupancyWithoutEPPawns, blackKingPosition);
if (isZero(rookAttacksFromKing.and(Board.bitboard_array_global[GenConst.WR])))
{
if (isZero(rookAttacksFromKing.and(Board.bitboard_array_global[GenConst.WQ])))
{
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = Board.ep;
move_list[move_count][MOVE_TAG] = GenConst.TAG_BLACKEP;
move_list[move_count][MOVE_PIECE] = GenConst.BP;
move_count++;
}
}
}
}
}
}
//#endregion
}
//#endregion
//#region Black rook moves
temp_bitboard = Board.bitboard_array_global[GenConst.BR];
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
starting_square = BitScanForward(temp_bitboard);
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
temp_pin_bitboard = MAX_ULONG;
if (pinNumber != 0)
{
for (int i = 0; i < pinNumber; i++)
{
if (pinArray[i][PINNED_SQUARE_INDEX] == starting_square)
{
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[blackKingPosition][pinArray[i][PINNING_PIECE_INDEX]];
}
}
}
BigInteger rookAttacks = MoveUtils.GetRookMovesSeparate(COMBINED_OCCUPANCIES, starting_square);
temp_attack = ((rookAttacks.and(WHITE_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard)));
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_CAPTURE;
move_list[move_count][MOVE_PIECE] = GenConst.BR;
move_count++;
}
temp_attack = ((rookAttacks.and(EMPTY_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard)));
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_NONE;
move_list[move_count][MOVE_PIECE] = GenConst.BR;
move_count++;
}
}
//#endregion
//#region Black bishop moves
temp_bitboard = Board.bitboard_array_global[GenConst.BB];
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
starting_square = BitScanForward(temp_bitboard);
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
temp_pin_bitboard = MAX_ULONG;
if (pinNumber != 0)
{
for (int i = 0; i < pinNumber; i++)
{
if (pinArray[i][PINNED_SQUARE_INDEX] == starting_square)
{
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[blackKingPosition][pinArray[i][PINNING_PIECE_INDEX]];
}
}
}
BigInteger bishopAttacks = MoveUtils.GetBishopMovesSeparate(COMBINED_OCCUPANCIES, starting_square);
temp_attack = ((bishopAttacks.and(WHITE_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard)));
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_CAPTURE;
move_list[move_count][MOVE_PIECE] = GenConst.BB;
move_count++;
}
temp_attack = ((bishopAttacks.and(EMPTY_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard)));
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_NONE;
move_list[move_count][MOVE_PIECE] = GenConst.BB;
move_count++;
}
}
//#endregion
//#region Black queen moves
temp_bitboard = Board.bitboard_array_global[GenConst.BQ];
while (temp_bitboard.compareTo(BigInteger.ZERO) != 0)
{
starting_square = BitScanForward(temp_bitboard);
temp_bitboard = temp_bitboard.and(temp_bitboard.subtract(BigInteger.ONE));
temp_pin_bitboard = MAX_ULONG;
if (pinNumber != 0)
{
for (int i = 0; i < pinNumber; i++)
{
if (pinArray[i][PINNED_SQUARE_INDEX] == starting_square)
{
temp_pin_bitboard = Inb.INBETWEEN_BITBOARDS[blackKingPosition][pinArray[i][PINNING_PIECE_INDEX]];
}
}
}
BigInteger queenAttacks = MoveUtils.GetRookMovesSeparate(COMBINED_OCCUPANCIES, starting_square);
queenAttacks = queenAttacks.and(MoveUtils.GetBishopMovesSeparate(COMBINED_OCCUPANCIES, starting_square));
temp_attack = ((queenAttacks.and(BLACK_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard)));
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_CAPTURE;
move_list[move_count][MOVE_PIECE] = GenConst.BQ;
move_count++;
}
temp_attack = ((queenAttacks.and(EMPTY_OCCUPANCIES).and(check_bitboard).and(temp_pin_bitboard)));
while (isNotZero(temp_attack))
{
target_square = BitScanForward(temp_attack);
temp_attack = removeBit(temp_attack);
move_list[move_count][MOVE_STARTING] = starting_square;
move_list[move_count][MOVE_TARGET] = target_square;
move_list[move_count][MOVE_TAG] = GenConst.TAG_NONE;
move_list[move_count][MOVE_PIECE] = GenConst.BQ;
move_count++;
}
}
//#endregion
}
}
//if (depth == 1)
//{
//return move_count;
//}
int nodes = 0;
int priorNodes;
int copyEp = Board.ep;
boolean[] copy_castle = {
Board.castle_rights_global[0],
Board.castle_rights_global[1],
Board.castle_rights_global[2],
Board.castle_rights_global[3],
};
for (int move_index = 0; move_index < move_count; move_index++)
{
int startingSquare = move_list[move_index][MOVE_STARTING];
int targetSquare = move_list[move_index][MOVE_TARGET];
int piece = move_list[move_index][MOVE_PIECE];
int tag = move_list[move_index][MOVE_TAG];
int captureIndex = -1;
Board.is_white_global = !Board.is_white_global;
switch (tag)
{
case GenConst.TAG_NONE: //none
case GenConst.TAG_CHECK: //check
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
break;
case GenConst.TAG_CAPTURE: //capture
case GenConst.TAG_CHECK_CAPTURE: //check cap
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
if (piece >= GenConst.WP && piece <= GenConst.WK)
{
for (int i = GenConst.BP; i <= GenConst.WP; ++i)
{
if (isNotZero((Board.bitboard_array_global[i].and(MoveConstants.SQUARE_BBS[targetSquare]))))
{
captureIndex = i;
break;
}
}
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].and(MoveConstants.SQUARE_BBS[targetSquare].not());
}
else //is black
{
for (int i = GenConst.WP; i <= GenConst.WK; ++i)
{
if (isNotZero((Board.bitboard_array_global[i].and(MoveConstants.SQUARE_BBS[targetSquare]))))
{
captureIndex = i;
break;
}
}
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].and(MoveConstants.SQUARE_BBS[targetSquare].not());
}
Board.ep = NO_SQUARE;
break;
case GenConst.TAG_WHITEEP: //white ep
//move piece
Board.bitboard_array_global[GenConst.WP] =Board.bitboard_array_global[GenConst.WP].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[GenConst.WP] =Board.bitboard_array_global[GenConst.WP].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.bitboard_array_global[GenConst.BP] =Board.bitboard_array_global[GenConst.BP].and(MoveConstants.SQUARE_BBS[targetSquare + 8].not());
Board.ep = NO_SQUARE;
break;
case GenConst.TAG_BLACKEP: //black ep
Board.bitboard_array_global[GenConst.BP] =Board.bitboard_array_global[GenConst.BP].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[GenConst.BP] =Board.bitboard_array_global[GenConst.BP].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.bitboard_array_global[GenConst.WP] =Board.bitboard_array_global[GenConst.WP].and(MoveConstants.SQUARE_BBS[targetSquare - 8].not());
Board.ep = NO_SQUARE;
break;
case GenConst.TAG_WCASTLEKS: //WKS
//white king
Board.bitboard_array_global[GenConst.WK] =Board.bitboard_array_global[GenConst.WK].or(MoveConstants.SQUARE_BBS[GenConst.G1]);
Board.bitboard_array_global[GenConst.WK] =Board.bitboard_array_global[GenConst.WK].and(MoveConstants.SQUARE_BBS[GenConst.E1].not());
Board.bitboard_array_global[GenConst.WR] =Board.bitboard_array_global[GenConst.WR].or(MoveConstants.SQUARE_BBS[GenConst.F1]);
Board.bitboard_array_global[GenConst.WR] =Board.bitboard_array_global[GenConst.WR].and(MoveConstants.SQUARE_BBS[GenConst.H1].not());
Board.castle_rights_global[WKS_CASTLE_RIGHTS] = false;
Board.castle_rights_global[WQS_CASTLE_RIGHTS] = false;
Board.ep = NO_SQUARE;
break;
case GenConst.TAG_WCASTLEQS: //WQS
Board.bitboard_array_global[GenConst.WK] =Board.bitboard_array_global[GenConst.WK].or(MoveConstants.SQUARE_BBS[GenConst.C1]);
Board.bitboard_array_global[GenConst.WK] =Board.bitboard_array_global[GenConst.WK].and(MoveConstants.SQUARE_BBS[GenConst.E1].not());
Board.bitboard_array_global[GenConst.WR] =Board.bitboard_array_global[GenConst.WR].or(MoveConstants.SQUARE_BBS[GenConst.D1]);
Board.bitboard_array_global[GenConst.WR] =Board.bitboard_array_global[GenConst.WR].and(MoveConstants.SQUARE_BBS[GenConst.A1].not());
Board.castle_rights_global[WKS_CASTLE_RIGHTS] = false;
Board.castle_rights_global[WQS_CASTLE_RIGHTS] = false;
Board.ep = NO_SQUARE;
break;
case GenConst.TAG_BCASTLEKS: //BKS
Board.bitboard_array_global[GenConst.BK] =Board.bitboard_array_global[GenConst.BK].or(MoveConstants.SQUARE_BBS[GenConst.G8]);
Board.bitboard_array_global[GenConst.BK] =Board.bitboard_array_global[GenConst.BK].and(MoveConstants.SQUARE_BBS[GenConst.E8].not());
Board.bitboard_array_global[GenConst.BR] =Board.bitboard_array_global[GenConst.BR].or(MoveConstants.SQUARE_BBS[GenConst.F8]);
Board.bitboard_array_global[GenConst.BR] =Board.bitboard_array_global[GenConst.BR].and(MoveConstants.SQUARE_BBS[GenConst.H8].not());
Board.castle_rights_global[BKS_CASTLE_RIGHTS] = false;
Board.castle_rights_global[BQS_CASTLE_RIGHTS] = false;
Board.ep = NO_SQUARE;
break;
case GenConst.TAG_BCASTLEQS: //BQS
Board.bitboard_array_global[GenConst.BK] =Board.bitboard_array_global[GenConst.BK].or(MoveConstants.SQUARE_BBS[GenConst.C8]);
Board.bitboard_array_global[GenConst.BK] =Board.bitboard_array_global[GenConst.BK].and(MoveConstants.SQUARE_BBS[GenConst.E8].not());
Board.bitboard_array_global[GenConst.BR] =Board.bitboard_array_global[GenConst.BR].or(MoveConstants.SQUARE_BBS[GenConst.D8]);
Board.bitboard_array_global[GenConst.BR] =Board.bitboard_array_global[GenConst.BR].and(MoveConstants.SQUARE_BBS[GenConst.A8].not());
Board.castle_rights_global[BKS_CASTLE_RIGHTS] = false;
Board.castle_rights_global[BQS_CASTLE_RIGHTS] = false;
Board.ep = NO_SQUARE;
break;
case GenConst.TAG_BKnightPromotion: //BNPr
Board.bitboard_array_global[GenConst.BN] =Board.bitboard_array_global[GenConst.BN].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
break;
case GenConst.TAG_BBishopPromotion: //BBPr
Board.bitboard_array_global[GenConst.BB] =Board.bitboard_array_global[GenConst.BB].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
break;
case GenConst.TAG_BQueenPromotion: //BQPr
Board.bitboard_array_global[GenConst.BQ] =Board.bitboard_array_global[GenConst.BQ].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
break;
case GenConst.TAG_BRookPromotion: //BRPr
Board.bitboard_array_global[GenConst.BR] =Board.bitboard_array_global[GenConst.BR].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
break;
case 12: //WNPr
Board.bitboard_array_global[GenConst.WN] =Board.bitboard_array_global[GenConst.WN].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
break;
case 13: //WBPr
Board.bitboard_array_global[GenConst.WB] =Board.bitboard_array_global[GenConst.WB].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
break;
case 14: //WQPr
Board.bitboard_array_global[GenConst.WQ] =Board.bitboard_array_global[GenConst.WQ].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
break;
case 15: //WRPr
Board.bitboard_array_global[GenConst.WR] =Board.bitboard_array_global[GenConst.WR].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
break;
case 16: //BNPrCAP
Board.bitboard_array_global[GenConst.BN] =Board.bitboard_array_global[GenConst.BN].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
for (int i = GenConst.WP; i <= GenConst.WK; ++i)
{
if (isNotZero((Board.bitboard_array_global[i].and(MoveConstants.SQUARE_BBS[targetSquare]))))
{
captureIndex = i;
break;
}
}
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case 17: //BBPrCAP
Board.bitboard_array_global[GenConst.BB] =Board.bitboard_array_global[GenConst.BB].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
for (int i = GenConst.WP; i <= GenConst.WK; ++i)
{
if (isNotZero((Board.bitboard_array_global[i].and(MoveConstants.SQUARE_BBS[targetSquare]))))
{
captureIndex = i;
break;
}
}
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case 18: //BQPrCAP
Board.bitboard_array_global[GenConst.BQ] =Board.bitboard_array_global[GenConst.BQ].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
for (int i = GenConst.WP; i <= GenConst.WK; ++i)
{
if (isNotZero((Board.bitboard_array_global[i].and(MoveConstants.SQUARE_BBS[targetSquare]))))
{
captureIndex = i;
break;
}
}
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case 19: //BRPrCAP
Board.bitboard_array_global[GenConst.BR] =Board.bitboard_array_global[GenConst.BR].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
for (int i = GenConst.WP; i <= GenConst.WK; ++i)
{
if (isNotZero((Board.bitboard_array_global[i].and(MoveConstants.SQUARE_BBS[targetSquare]))))
{
captureIndex = i;
break;
}
}
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case 20: //WNPrCAP
Board.bitboard_array_global[GenConst.WN] =Board.bitboard_array_global[GenConst.WN].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
for (int i = GenConst.BP; i <= GenConst.BK; ++i)
{
if (isNotZero((Board.bitboard_array_global[i].and(MoveConstants.SQUARE_BBS[targetSquare]))))
{
captureIndex = i;
break;
}
}
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case 21: //WBPrCAP
Board.bitboard_array_global[GenConst.WB] =Board.bitboard_array_global[GenConst.WB].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
for (int i = GenConst.BP; i <= GenConst.BK; ++i)
{
if (isNotZero((Board.bitboard_array_global[i].and(MoveConstants.SQUARE_BBS[targetSquare]))))
{
captureIndex = i;
break;
}
}
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case 22: //WQPrCAP
Board.bitboard_array_global[GenConst.WQ] =Board.bitboard_array_global[GenConst.WQ].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
for (int i = GenConst.BP; i <= GenConst.BK; ++i)
{
if (isNotZero((Board.bitboard_array_global[i].and(MoveConstants.SQUARE_BBS[targetSquare]))))
{
captureIndex = i;
break;
}
}
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case 23: //WRPrCAP
Board.bitboard_array_global[GenConst.WR] =Board.bitboard_array_global[GenConst.WR].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = NO_SQUARE;
for (int i = GenConst.BP; i <= GenConst.BK; i++)
{
if (isNotZero((Board.bitboard_array_global[i].and(MoveConstants.SQUARE_BBS[targetSquare]))))
{
captureIndex = i;
break;
}
}
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case 24: //WDouble
Board.bitboard_array_global[GenConst.WP] =Board.bitboard_array_global[GenConst.WP].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[GenConst.WP] =Board.bitboard_array_global[GenConst.WP].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = targetSquare + 8;
break;
case 25: //BDouble
Board.bitboard_array_global[GenConst.BP] =Board.bitboard_array_global[GenConst.BP].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[GenConst.BP] =Board.bitboard_array_global[GenConst.BP].and(MoveConstants.SQUARE_BBS[startingSquare].not());
Board.ep = targetSquare - 8;
break;
}
if (piece == GenConst.WK)
{
Board.castle_rights_global[WKS_CASTLE_RIGHTS] = false;
Board.castle_rights_global[WQS_CASTLE_RIGHTS] = false;
}
else if (piece == GenConst.BK)
{
Board.castle_rights_global[BKS_CASTLE_RIGHTS] = false;
Board.castle_rights_global[BQS_CASTLE_RIGHTS] = false;
}
else if (piece == GenConst.WR)
{
if (Board.castle_rights_global[WKS_CASTLE_RIGHTS] == true)
{
if (isZero((Board.bitboard_array_global[GenConst.WR].and(MoveConstants.SQUARE_BBS[GenConst.H1]))))
{
Board.castle_rights_global[WKS_CASTLE_RIGHTS] = false;
}
}
if (Board.castle_rights_global[WQS_CASTLE_RIGHTS] == true)
{
if (isZero((Board.bitboard_array_global[GenConst.WR].and(MoveConstants.SQUARE_BBS[GenConst.A1]))))
{
Board.castle_rights_global[WQS_CASTLE_RIGHTS] = false;
}
}
}
else if (piece == GenConst.BR)
{
if (Board.castle_rights_global[BKS_CASTLE_RIGHTS] == true)
{
if (isZero((Board.bitboard_array_global[GenConst.BR].and(MoveConstants.SQUARE_BBS[GenConst.H8]))))
{
Board.castle_rights_global[BKS_CASTLE_RIGHTS] = false;
}
}
if (Board.castle_rights_global[BQS_CASTLE_RIGHTS] == true)
{
if (isZero((Board.bitboard_array_global[GenConst.BR].and(MoveConstants.SQUARE_BBS[GenConst.A8]))))
{
Board.castle_rights_global[BQS_CASTLE_RIGHTS] = false;
}
}
}
priorNodes = nodes;
nodes += PerftInlineGlobal(depth - 1, ply + 1);
Board.is_white_global = !Board.is_white_global;
switch (tag)
{
case GenConst.TAG_NONE: //none
case GenConst.TAG_CHECK: //check
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case GenConst.TAG_CAPTURE: //capture
case GenConst.TAG_CHECK_CAPTURE: //check cap
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].and(MoveConstants.SQUARE_BBS[targetSquare].not());
Board.bitboard_array_global[captureIndex] = Board.bitboard_array_global[captureIndex].or(MoveConstants.SQUARE_BBS[startingSquare]);
break;
case GenConst.TAG_WHITEEP: //white ep
//move piece
Board.bitboard_array_global[GenConst.WP] =Board.bitboard_array_global[GenConst.WP].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.WP] =Board.bitboard_array_global[GenConst.WP].and(MoveConstants.SQUARE_BBS[targetSquare].not());
Board.bitboard_array_global[GenConst.BP] =Board.bitboard_array_global[GenConst.BP].and(MoveConstants.SQUARE_BBS[targetSquare + 8]);
break;
case GenConst.TAG_BLACKEP: //black ep
Board.bitboard_array_global[GenConst.BP] =Board.bitboard_array_global[GenConst.BP].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.BP] =Board.bitboard_array_global[GenConst.BP].and(MoveConstants.SQUARE_BBS[targetSquare].not());
Board.bitboard_array_global[GenConst.WP] =Board.bitboard_array_global[GenConst.WP].or(MoveConstants.SQUARE_BBS[targetSquare - 8]);
break;
case GenConst.TAG_WCASTLEKS: //WKS
//white king
Board.bitboard_array_global[GenConst.WK] =Board.bitboard_array_global[GenConst.WK].or(MoveConstants.SQUARE_BBS[GenConst.E1]);
Board.bitboard_array_global[GenConst.WK] =Board.bitboard_array_global[GenConst.WK].and(MoveConstants.SQUARE_BBS[GenConst.G1].not());
Board.bitboard_array_global[GenConst.WR] =Board.bitboard_array_global[GenConst.WR].or(MoveConstants.SQUARE_BBS[GenConst.H1]);
Board.bitboard_array_global[GenConst.WR] =Board.bitboard_array_global[GenConst.WR].and(MoveConstants.SQUARE_BBS[GenConst.F1].not());
break;
case GenConst.TAG_WCASTLEQS: //WQS
Board.bitboard_array_global[GenConst.WK] =Board.bitboard_array_global[GenConst.WK].or(MoveConstants.SQUARE_BBS[GenConst.E1]);
Board.bitboard_array_global[GenConst.WK] =Board.bitboard_array_global[GenConst.WK].and(MoveConstants.SQUARE_BBS[GenConst.C1].not());
Board.bitboard_array_global[GenConst.WR] =Board.bitboard_array_global[GenConst.WR].or(MoveConstants.SQUARE_BBS[GenConst.A1]);
Board.bitboard_array_global[GenConst.WR] =Board.bitboard_array_global[GenConst.WR].and(MoveConstants.SQUARE_BBS[GenConst.D1].not());
break;
case GenConst.TAG_BCASTLEKS: //BKS
Board.bitboard_array_global[GenConst.BK] =Board.bitboard_array_global[GenConst.BK].or(MoveConstants.SQUARE_BBS[GenConst.E8]);
Board.bitboard_array_global[GenConst.BK] =Board.bitboard_array_global[GenConst.BK].and(MoveConstants.SQUARE_BBS[GenConst.G8].not());
Board.bitboard_array_global[GenConst.BR] =Board.bitboard_array_global[GenConst.BR].or(MoveConstants.SQUARE_BBS[GenConst.H8]);
Board.bitboard_array_global[GenConst.BR] =Board.bitboard_array_global[GenConst.BR].and(MoveConstants.SQUARE_BBS[GenConst.F8].not());
break;
case GenConst.TAG_BCASTLEQS: //BQS
Board.bitboard_array_global[GenConst.BK] =Board.bitboard_array_global[GenConst.BK].or(MoveConstants.SQUARE_BBS[GenConst.E8]);
Board.bitboard_array_global[GenConst.BK] =Board.bitboard_array_global[GenConst.BK].and(MoveConstants.SQUARE_BBS[GenConst.C8].not());
Board.bitboard_array_global[GenConst.BR] =Board.bitboard_array_global[GenConst.BR].or(MoveConstants.SQUARE_BBS[GenConst.A8]);
Board.bitboard_array_global[GenConst.BR] =Board.bitboard_array_global[GenConst.BR].and(MoveConstants.SQUARE_BBS[GenConst.D8].not());
break;
case GenConst.TAG_BKnightPromotion: //BNPr
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.BN] =Board.bitboard_array_global[GenConst.BN].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case GenConst.TAG_BBishopPromotion: //BBPr
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.BB] =Board.bitboard_array_global[GenConst.BB].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case GenConst.TAG_BQueenPromotion: //BQPr
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.BQ] =Board.bitboard_array_global[GenConst.BQ].and(MoveConstants.SQUARE_BBS[targetSquare].not());
Board.ep = NO_SQUARE;
break;
case GenConst.TAG_BRookPromotion: //BRPr
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.BR] =Board.bitboard_array_global[GenConst.BR].and(MoveConstants.SQUARE_BBS[targetSquare].not());
Board.ep = NO_SQUARE;
break;
case 12: //WNPr
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.WN] =Board.bitboard_array_global[GenConst.WN].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case 13: //WBPr
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.WB] =Board.bitboard_array_global[GenConst.WB].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case 14: //WQPr
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.WQ] =Board.bitboard_array_global[GenConst.WQ].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case 15: //WRPr
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.WR] =Board.bitboard_array_global[GenConst.WR].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case 16: //BNPrCAP
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.BN] =Board.bitboard_array_global[GenConst.BN].and(MoveConstants.SQUARE_BBS[targetSquare].not());
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].or(MoveConstants.SQUARE_BBS[targetSquare]);
break;
case 17: //BBPrCAP
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.BB] =Board.bitboard_array_global[GenConst.BB].and(MoveConstants.SQUARE_BBS[targetSquare].not());
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].or(MoveConstants.SQUARE_BBS[targetSquare]);
break;
case 18: //BQPrCAP
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.BQ] =Board.bitboard_array_global[GenConst.BQ].and(MoveConstants.SQUARE_BBS[targetSquare].not());
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].or(MoveConstants.SQUARE_BBS[targetSquare]);
break;
case 19: //BRPrCAP
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.BR] =Board.bitboard_array_global[GenConst.BR].and(MoveConstants.SQUARE_BBS[targetSquare].not());
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].or(MoveConstants.SQUARE_BBS[targetSquare]);
break;
case 20: //WNPrCAP
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.WN] =Board.bitboard_array_global[GenConst.WN].and(MoveConstants.SQUARE_BBS[targetSquare].not());
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].or(MoveConstants.SQUARE_BBS[targetSquare]);
break;
case 21: //WBPrCAP
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.WB] =Board.bitboard_array_global[GenConst.WB].and(MoveConstants.SQUARE_BBS[targetSquare].not());
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].or(MoveConstants.SQUARE_BBS[targetSquare]);
break;
case 22: //WQPrCAP
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.WQ] =Board.bitboard_array_global[GenConst.WQ].and(MoveConstants.SQUARE_BBS[targetSquare].not());
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].or(MoveConstants.SQUARE_BBS[targetSquare]);
break;
case 23: //WRPrCAP
Board.bitboard_array_global[piece] =Board.bitboard_array_global[piece].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.WR] =Board.bitboard_array_global[GenConst.WR].and(MoveConstants.SQUARE_BBS[targetSquare].not());
Board.bitboard_array_global[captureIndex] =Board.bitboard_array_global[captureIndex].or(MoveConstants.SQUARE_BBS[targetSquare]);
break;
case 24: //WDouble
Board.bitboard_array_global[GenConst.WP] =Board.bitboard_array_global[GenConst.WP].or(MoveConstants.SQUARE_BBS[startingSquare]);
Board.bitboard_array_global[GenConst.WP] =Board.bitboard_array_global[GenConst.WP].and(MoveConstants.SQUARE_BBS[targetSquare].not());
break;
case 25: //BDouble
Board.bitboard_array_global[GenConst.BP] =Board.bitboard_array_global[GenConst.BP].or(MoveConstants.SQUARE_BBS[targetSquare]);
Board.bitboard_array_global[GenConst.BP] =Board.bitboard_array_global[GenConst.BP].and(MoveConstants.SQUARE_BBS[startingSquare].not());
break;
}
Board.castle_rights_global[0] = copy_castle[0];
Board.castle_rights_global[1] = copy_castle[1];
Board.castle_rights_global[2] = copy_castle[2];
Board.castle_rights_global[3] = copy_castle[3];
Board.ep = copyEp;
//if (epGlobal != NO_SQUARE)
//{
// std::cout << " ep: " << SQ_CHAR_X[epGlobal] << SQ_CHAR_Y[epGlobal] << '\n';
//}
if (ply == 0)
{
//Pr.printInt(startingSquare);
//Pr.printInt(targetSquare);
//Pr.printInt(tag);
PrintMoveNoNL(startingSquare, targetSquare, tag);
System.out.printf(": %d\n", nodes - priorNodes);
}
}
return nodes;
}
public static void RunPerftInlineGlobalOcc(int depth)
{
long startTime = System.currentTimeMillis();
int nodes = PerftInlineDebug(depth, 0);
long endTime = System.currentTimeMillis();
long elapsedTime = endTime - startTime;
String nodeString = String.format("Nodes: %d\n", nodes);
String timeString = String.format("Time taken: %d ms\n", elapsedTime);
Pr.print(nodeString);
Pr.print(timeString);
}
}
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