internal static ulong UpdateZobristHash(ulong hash, MoveContent move, ChessPieceColor whosMove, bool pawnPromote)
{
hash = Zobrist.GetHashResult((int)move.MovingPiecePrimary.SrcPosition, move.MovingPiecePrimary.PieceType, move.MovingPiecePrimary.PieceColor, hash);
if (move.MovingPieceSecondary.PieceType != ChessPieceType.None)
{
hash = Zobrist.GetHashResult((int)move.MovingPieceSecondary.SrcPosition, move.MovingPieceSecondary.PieceType, move.MovingPieceSecondary.PieceColor, hash);
hash = Zobrist.GetHashResult((int)move.MovingPieceSecondary.DstPosition, move.MovingPieceSecondary.PieceType, move.MovingPieceSecondary.PieceColor, hash);
if (move.MovingPieceSecondary.PieceColor == ChessPieceColor.White)
{
hash ^= Zobrist.ZobristTable[770];
}
else
{
hash ^= Zobrist.ZobristTable[771];
}
}
if (move.TakenPiece.PieceType != ChessPieceType.None)
{
hash = Zobrist.GetHashResult((int)move.TakenPiece.Position, move.TakenPiece.PieceType, move.TakenPiece.PieceColor, hash);
}
hash = !pawnPromote?Zobrist.GetHashResult((int)move.MovingPiecePrimary.DstPosition, move.MovingPiecePrimary.PieceType, move.MovingPiecePrimary.PieceColor, hash) : Zobrist.GetHashResult((int)move.MovingPiecePrimary.DstPosition, ChessPieceType.Queen, move.MovingPiecePrimary.PieceColor, hash);
if (whosMove == ChessPieceColor.White)
{
hash ^= Zobrist.ZobristTable[769];
hash ^= Zobrist.ZobristTable[768];
}
else
{
hash ^= Zobrist.ZobristTable[768];
hash ^= Zobrist.ZobristTable[769];
}
return(hash);
}
internal static ulong CalculateZobristHash(Board board)
{
ulong hash = 0;
for (int position = 0; position < 64; ++position)
{
Square square = board.Squares[position];
if (square.Piece != null)
{
hash = Zobrist.GetHashResult(position, square.Piece.PieceType, square.Piece.PieceColor, hash);
}
}
ulong num = board.WhoseMove != ChessPieceColor.White ? hash ^ Zobrist.ZobristTable[769] : hash ^ Zobrist.ZobristTable[768];
if (board.WhiteCastled)
{
num ^= Zobrist.ZobristTable[770];
}
if (board.BlackCastled)
{
num ^= Zobrist.ZobristTable[771];
}
return(num);
}
