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Create MoveUtils.cs

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Coding with Tom
2025-01-20 17:00:19 +00:00
committed by GitHub
parent b3c6b118bb
commit dff3b0da9d
1 changed files with 221 additions and 0 deletions
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C#/Cleaner and slower version/MoveUtils.cs Normal file
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using static CEngineCopy.Constants;
using static CEngineCopy.Board;
namespace CEngineCopy
{
public class MoveUtils
{
public const ulong MAGIC = 0x03f79d71b4cb0a89;
public static readonly 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
};
public static int BitScanForward(ulong tempBitboard)
{
return (DEBRUIJN64[MAGIC * (tempBitboard ^ (tempBitboard - 1)) >> 58]);
}
public static void AddMove(ref int moveCount, ref Span<int> startingSquares, ref Span<int> targetSquares, ref Span<int> tags, ref Span<int> pieces, int startingSquare, int targetSquare, int piece, int tag)
{
startingSquares[moveCount] = startingSquare;
targetSquares[moveCount] = targetSquare;
tags[moveCount] = tag;
pieces[moveCount] = piece;
moveCount++;
}
public static bool CanWhiteCastleKingside(ulong COMBINED_OCCS)
{
if (castle_rights_global[WKS_CASTLE_RIGHTS] == false)
{
return false;
}
if ((WKS_EMPTY_BITBOARD & COMBINED_OCCS) != 0) //f1 and g1 empty
{
return false;
}
if ((bitboard_array_global[WR] & SQUARE_BBS[H1]) == 0) //rook on h1
{
return false;
}
if (Is_Square_Attacked_By_Black_Global(F1, COMBINED_OCCS) == true)
{
return false;
}
if (Is_Square_Attacked_By_Black_Global(G1, COMBINED_OCCS) == true)
{
return false;
}
return true;
}
public static bool CanWhiteCastleQueenside(ulong COMBINED_OCCS)
{
if (castle_rights_global[WQS_CASTLE_RIGHTS] == false)
{
return false;
}
if ((WQS_EMPTY_BITBOARD & COMBINED_OCCS) != 0) //f1 and g1 empty
{
return false;
}
if ((bitboard_array_global[WR] & SQUARE_BBS[A1]) == 0) //rook on h1
{
return false;
}
if (Is_Square_Attacked_By_Black_Global(C1, COMBINED_OCCS) == true)
{
return false;
}
if (Is_Square_Attacked_By_Black_Global(D1, COMBINED_OCCS) == true)
{
return false;
}
return true;
}
public static bool CanBlackCastleKingside(ulong COMBINED_OCCS)
{
if (castle_rights_global[BKS_CASTLE_RIGHTS] == false)
{
return false;
}
if ((BKS_EMPTY_BITBOARD & COMBINED_OCCS) != 0)
{ //f8 and g8 not empty
return false;
}
if ((bitboard_array_global[BR] & SQUARE_BBS[H8]) == 0)
{ //rook not on h8
return false;
}
if (Is_Square_Attacked_By_White_Global(F8, COMBINED_OCCS) == true)
{
return false;
}
if (Is_Square_Attacked_By_White_Global(G8, COMBINED_OCCS) == true)
{
return false;
}
return true;
}
public static bool CanBlackCastleQueenside(ulong COMBINED_OCCS)
{
if (castle_rights_global[BQS_CASTLE_RIGHTS] == false)
{
return false;
}
if ((BQS_EMPTY_BITBOARD & COMBINED_OCCS) != 0)
{ //c8,b8, d8 not empty
return false;
}
if ((bitboard_array_global[BR] & SQUARE_BBS[A8]) == 0)
{ //rook not on a8
return false;
}
if (Is_Square_Attacked_By_White_Global(C8, COMBINED_OCCS) == true)
{
return false;
}
if (Is_Square_Attacked_By_White_Global(D8, COMBINED_OCCS) == true)
{
return false;
}
return true;
}
public static bool Is_Square_Attacked_By_Black_Global(int square, ulong occupancy)
{
if ((bitboard_array_global[BP] & WHITE_PAWN_ATTACKS[square]) != 0)
{
return true;
}
if ((bitboard_array_global[BN] & KNIGHT_ATTACKS[square]) != 0)
{
return true;
}
if ((bitboard_array_global[BK] & KING_ATTACKS[square]) != 0)
{
return true;
}
ulong bishopAttacks = GetBishopAttacksFast(square, occupancy);
if ((bitboard_array_global[BB] & bishopAttacks) != 0)
{
return true;
}
if ((bitboard_array_global[BQ] & bishopAttacks) != 0)
{
return true;
}
ulong rookAttacks = GetRookAttacksFast(square, occupancy);
if ((bitboard_array_global[BR] & rookAttacks) != 0)
{
return true;
}
if ((bitboard_array_global[BQ] & rookAttacks) != 0)
{
return true;
}
return false;
}
public static bool Is_Square_Attacked_By_White_Global(int square, ulong occupancy)
{
if ((bitboard_array_global[WP] & BLACK_PAWN_ATTACKS[square]) != 0)
{
return true;
}
if ((bitboard_array_global[WN] & KNIGHT_ATTACKS[square]) != 0)
{
return true;
}
if ((bitboard_array_global[WK] & KING_ATTACKS[square]) != 0)
{
return true;
}
ulong bishopAttacks = GetBishopAttacksFast(square, occupancy);
if ((bitboard_array_global[WB] & bishopAttacks) != 0)
{
return true;
}
if ((bitboard_array_global[WQ] & bishopAttacks) != 0)
{
return true;
}
ulong rookAttacks = GetRookAttacksFast(square, occupancy);
if ((bitboard_array_global[WR] & rookAttacks) != 0)
{
return true;
}
if ((bitboard_array_global[WQ] & rookAttacks) != 0)
{
return true;
}
return false;
}
public static bool OutOfBounds(int move)
{
if (move < 0)
{
return true;
}
if (move > 63)
{
return true;
}
return false;
}
}
}