public PositionLongHash CalculateHash(Position.Position position)
{
var result = new PositionLongHash();
result = result.CalculateXor(
CalculatePiecesHash(
position.Board.GetPieces(Player.Black),
Player.Black));
result = result.CalculateXor(
CalculatePiecesHash(
position.Board.GetPieces(Player.White),
Player.White));
result = result.CalculateXor(playerToMoveHashesTable[(int)position.PlayerToMove]);
result = result.CalculateXor(
GetEnPassantCaptureColumnHash(position.EnPassantCaptureColumn));
result = result.CalculateXor(
GetCastlingAvailabilityHash(
position.GetCastlingAvailability(Player.Black),
Player.Black));
result = result.CalculateXor(
GetCastlingAvailabilityHash(
position.GetCastlingAvailability(Player.White),
Player.White));
return(result);
}
private void AppendCastleMoves(Position.Position position, List <Move> moves)
{
var availabilityFlags = position.GetCastlingAvailability(player);
if (!availabilityFlags.CanCastleShort && !availabilityFlags.CanCastleLong)
{
return;
}
var board = position.Board;
if (IsBoardSquareAttacked(initialKingSquare, board, otherPlayer))
{
return;
}
if (availabilityFlags.CanCastleShort && IsLegalToCastleShort(board))
{
moves.Add(shortCastleMove);
}
if (availabilityFlags.CanCastleLong && IsLegalToCaslteLong(board))
{
moves.Add(longCastleMove);
}
}
