static Cuckoo()
{
// initialize cuckoo tables
CuckooKeys = new HashKey[8192];
CuckooMoves = new Move[8192];
Span <Piece> pieces = stackalloc Piece[]
{
Enums.Pieces.WhitePawn,
Enums.Pieces.WhiteKnight,
Enums.Pieces.WhiteBishop,
Enums.Pieces.WhiteRook,
Enums.Pieces.WhiteQueen,
Enums.Pieces.WhiteKing,
Enums.Pieces.BlackPawn,
Enums.Pieces.BlackKnight,
Enums.Pieces.BlackBishop,
Enums.Pieces.BlackRook,
Enums.Pieces.BlackQueen,
Enums.Pieces.BlackKing
};
var count = 0;
foreach (var pc in pieces)
{
foreach (var sq1 in BitBoards.AllSquares)
{
for (var sq2 = sq1 + 1; sq2 <= Enums.Squares.h8; ++sq2)
{
if ((pc.Type().PseudoAttacks(sq1) & sq2).IsEmpty)
{
continue;
}
var move = Move.Create(sq1, sq2);
HashKey key = pc.GetZobristPst(sq1) ^ pc.GetZobristPst(sq2) ^ Zobrist.GetZobristSide();
var i = CuckooHashOne(key);
while (true)
{
(CuckooKeys[i], key) = (key, CuckooKeys[i].Key);
/// <summary>
/// Updates the hash key depending on a move
/// </summary>
/// <param name="move">The move the hash key is depending on</param>
private void UpdateKey(Move move)
{
// TODO : Merge with MakeMove to avoid duplicate ifs
var pawnKey = State.PawnStructureKey;
var key = State.Key ^ pawnKey;
pawnKey ^= Zobrist.GetZobristSide();
if (_stateList[PositionIndex - 1].EnPassantSquare != ESquare.none)
{
key ^= _stateList[PositionIndex - 1].EnPassantSquare.File().GetZobristEnPessant();
}
if (State.EnPassantSquare != ESquare.none)
{
key ^= State.EnPassantSquare.File().GetZobristEnPessant();
}
if (move.IsNullMove())
{
State.Key = key ^ pawnKey;
State.PawnStructureKey = pawnKey;
return;
}
var pawnPiece = move.GetMovingPieceType() == EPieceType.Pawn;
var squareTo = move.GetToSquare();
if (move.IsPromotionMove())
{
key ^= move.GetPromotedPiece().GetZobristPst(squareTo);
}
else
{
if (pawnPiece)
{
pawnKey ^= move.GetMovingPiece().GetZobristPst(squareTo);
}
else
{
key ^= move.GetMovingPiece().GetZobristPst(squareTo);
}
}
if (pawnPiece)
{
pawnKey ^= move.GetMovingPiece().GetZobristPst(move.GetFromSquare());
if (move.IsEnPassantMove())
{
pawnKey ^= move.GetCapturedPiece().GetZobristPst(squareTo + State.SideToMove.PawnPushDistance());
}
else if (move.IsCaptureMove())
{
pawnKey ^= move.GetCapturedPiece().GetZobristPst(squareTo);
}
}
else
{
key ^= move.GetMovingPiece().GetZobristPst(move.GetFromSquare());
if (move.IsCaptureMove())
{
key ^= move.GetCapturedPiece().GetZobristPst(squareTo);
}
else if (move.IsCastlelingMove())
{
var piece = EPieceType.Rook.MakePiece(Position.State.SideToMove);
key ^= piece.GetZobristPst(Position.GetRookCastleFrom(squareTo));
key ^= piece.GetZobristPst(squareTo.GetRookCastleTo());
}
}
// castling rights
if (State.CastlelingRights != _stateList[PositionIndex - 1].CastlelingRights)
{
key ^= _stateList[PositionIndex - 1].CastlelingRights.GetZobristCastleling();
key ^= State.CastlelingRights.GetZobristCastleling();
}
State.Key = key ^ pawnKey;
State.PawnStructureKey = pawnKey;
}
public KeyGeneratorFixture()
{
KeyGenerator = new Zobrist();
KeyGenerator.Init();
}
/// <summary>
/// Updates the hash key depending on a move
/// </summary>
/// <param name="move">The move the hash key is depending on</param>
private void UpdateKey(Move move)
{
// TODO : Merge with MakeMove to avoid duplicate ifs
var pawnKey = State.PawnStructureKey;
var key = State.Key ^ pawnKey;
pawnKey ^= Zobrist.GetZobristSide();
if (_stateList[PositionIndex - 1].EnPassantSquare != ESquare.none)
{
key ^= Zobrist.GetZobristEnPessant(_stateList[PositionIndex - 1].EnPassantSquare.File().AsInt());
}
if (State.EnPassantSquare != ESquare.none)
{
key ^= Zobrist.GetZobristEnPessant(State.EnPassantSquare.File().AsInt());
}
if (move.IsNullMove())
{
key ^= pawnKey;
State.Key = key;
State.PawnStructureKey = pawnKey;
return;
}
var pawnPiece = move.GetMovingPieceType() == EPieceType.Pawn;
if (pawnPiece)
{
pawnKey ^= Zobrist.GetZobristPst(move.GetMovingPiece(), move.GetFromSquare());
}
else
{
key ^= Zobrist.GetZobristPst(move.GetMovingPiece(), move.GetFromSquare());
}
var squareTo = move.GetToSquare();
if (move.IsPromotionMove())
{
key ^= Zobrist.GetZobristPst(move.GetPromotedPiece(), squareTo);
}
else
{
if (pawnPiece)
{
pawnKey ^= Zobrist.GetZobristPst(move.GetMovingPiece(), squareTo);
}
else
{
key ^= Zobrist.GetZobristPst(move.GetMovingPiece(), squareTo);
}
}
if (pawnPiece && move.IsEnPassantMove())
{
pawnKey ^= Zobrist.GetZobristPst(move.GetCapturedPiece().Type() + (State.SideToMove << 3), squareTo + (State.SideToMove.Side == 0 ? 8 : -8));
}
else if (move.IsCaptureMove())
{
if (pawnPiece)
{
pawnKey ^= Zobrist.GetZobristPst(move.GetCapturedPiece(), squareTo);
}
else
{
key ^= Zobrist.GetZobristPst(move.GetCapturedPiece(), squareTo);
}
}
else if (move.IsCastlelingMove())
{
var piece = (EPieces)(EPieceType.Rook + move.GetSideMask());
key ^= Zobrist.GetZobristPst(piece, Position.GetRookCastleFrom(squareTo));
key ^= Zobrist.GetZobristPst(piece, squareTo.GetRookCastleTo());
}
// castleling
// castling rights
if (State.CastlelingRights != _stateList[PositionIndex - 1].CastlelingRights)
{
key ^= Zobrist.GetZobristCastleling(_stateList[PositionIndex - 1].CastlelingRights);
key ^= Zobrist.GetZobristCastleling(State.CastlelingRights);
}
key ^= pawnKey;
State.Key = key;
State.PawnStructureKey = pawnKey;
}
/// <summary>
/// Apply a FEN string board setup to the board structure.
/// </summary>
/// <param name="fenString">The string to set</param>
/// <param name="validate">If true, the fen string is validated, otherwise not</param>
/// <returns>
/// 0 = all ok.
/// -1 = Error in piece file layout parsing
/// -2 = Error in piece rank layout parsing
/// -3 = Unknown piece detected
/// -4 = Error while parsing moving side
/// -5 = Error while parsing castleling
/// -6 = Error while parsing en-passant square
/// -9 = FEN length exceeding maximum
/// </returns>
public FenError SetFen(FenData fen, bool validate = false)
{
if (validate)
{
Fen.Fen.Validate(fen.Fen.ToString());
}
// correctly clear all pieces and invoke possible notification(s)
var bb = Occupied;
while (bb)
{
var square = bb.Lsb();
Position.RemovePiece(square, Position.BoardLayout[square.AsInt()]);
BitBoards.ResetLsb(ref bb);
}
var chunk = fen.Chunk();
if (chunk.IsEmpty)
{
return(new FenError());
}
var f = 1; // file (column)
var r = 8; // rank (row)
Player player;
foreach (var c in chunk)
{
if (char.IsDigit(c))
{
f += c - '0';
if (f > 9)
{
return(new FenError(-1, fen.Index));
}
}
else if (c == '/')
{
if (f != 9)
{
return(new FenError(-2, fen.Index));
}
r--;
f = 1;
}
else
{
var pieceIndex = PieceExtensions.PieceChars.IndexOf(c);
if (pieceIndex == -1)
{
return(new FenError(-3, fen.Index));
}
player = char.IsLower(PieceExtensions.PieceChars[pieceIndex]);
var square = new Square(r - 1, f - 1);
AddPiece(square, player, (EPieceType)pieceIndex);
f++;
}
}
// player
chunk = fen.Chunk();
if (chunk.IsEmpty || chunk.Length != 1)
{
return(new FenError(-3, fen.Index));
}
player = (chunk[0] != 'w').ToInt();
// castleling
chunk = fen.Chunk();
if (!SetupCastleling(chunk))
{
return(new FenError(-5, fen.Index));
}
// en-passant
chunk = fen.Chunk();
if (chunk.Length == 1 || chunk[0] == '-' || !chunk[0].InBetween('a', 'h'))
{
State.EnPassantSquare = ESquare.none;
}
else
{
State.EnPassantSquare = chunk[1].InBetween('3', '6') ? ESquare.none : new Square(chunk[1] - '1', chunk[0] - 'a').Value;
}
// move number
chunk = fen.Chunk();
var moveNum = 0;
var halfMoveNum = 0;
if (!chunk.IsEmpty)
{
chunk.ToIntegral(out halfMoveNum);
// half move number
chunk = fen.Chunk();
chunk.ToIntegral(out moveNum);
if (moveNum > 0)
{
moveNum--;
}
}
PositionIndex = PositionStart = moveNum;
Position.State = _stateList[PositionIndex];
State.ReversibleHalfMoveCount = halfMoveNum;
State.SideToMove = player;
if (player.IsBlack())
{
State.Key ^= Zobrist.GetZobristSide();
State.PawnStructureKey ^= Zobrist.GetZobristSide();
}
State.Key ^= State.CastlelingRights.GetZobristCastleling();
if (State.EnPassantSquare != ESquare.none)
{
State.Key ^= State.EnPassantSquare.File().GetZobristEnPessant();
}
Position.InCheck = Position.IsAttacked(Position.GetPieceSquare(EPieceType.King, player), ~player);
return(0);
}
internal static void EvaluateBoardScore(Board board)
{
if ((int)board.EnPassantPosition == 0 && !board.EndGamePhase)
{
int?nullable1 = Zobrist.SearchEval(board.ZobristHash);
if (nullable1.HasValue)
{
int?nullable2 = nullable1;
int num = 0;
if ((nullable2.GetValueOrDefault() == num ? (!nullable2.HasValue ? 1 : 0) : 1) != 0)
{
board.Score = nullable1.Value;
return;
}
}
}
board.Score = 0;
bool insufficientMaterial = true;
if (board.StaleMate || (int)board.FiftyMove >= 50 || (int)board.RepeatedMove >= 3)
{
return;
}
if (board.BlackMate)
{
board.Score = (int)short.MaxValue;
}
else if (board.WhiteMate)
{
board.Score = -32767;
}
else
{
if (board.BlackCheck)
{
board.Score += 70;
if (board.EndGamePhase)
{
board.Score += 10;
}
}
else if (board.WhiteCheck)
{
board.Score -= 70;
if (board.EndGamePhase)
{
board.Score -= 10;
}
}
if (board.BlackCastled)
{
board.Score -= 50;
}
if (board.WhiteCastled)
{
board.Score += 50;
}
if (board.WhoseMove == ChessPieceColor.White)
{
board.Score += 10;
}
else
{
board.Score -= 10;
}
byte bishopCount1 = 0;
byte bishopCount2 = 0;
byte knightCount1 = 0;
byte knightCount2 = 0;
byte num = 0;
Evaluation.blackPawnCount = new short[8];
Evaluation.whitePawnCount = new short[8];
for (byte position = 0; (int)position < 64; ++position)
{
Square square = board.Squares[(int)position];
if (square.Piece != null)
{
if (square.Piece.PieceColor == ChessPieceColor.White)
{
board.Score += Evaluation.EvaluatePieceScore(square, position, board.EndGamePhase, ref knightCount2, ref bishopCount2, ref insufficientMaterial);
if (square.Piece.PieceType == ChessPieceType.King && (int)position != 59 && (int)position != 60)
{
int pawnPos1 = (int)position - 8;
board.Score += Evaluation.CheckPawnWall(board, pawnPos1, (int)position);
int pawnPos2 = (int)position - 7;
board.Score += Evaluation.CheckPawnWall(board, pawnPos2, (int)position);
int pawnPos3 = (int)position - 9;
board.Score += Evaluation.CheckPawnWall(board, pawnPos3, (int)position);
}
}
else if (square.Piece.PieceColor == ChessPieceColor.Black)
{
board.Score -= Evaluation.EvaluatePieceScore(square, position, board.EndGamePhase, ref knightCount1, ref bishopCount1, ref insufficientMaterial);
if (square.Piece.PieceType == ChessPieceType.King && (int)position != 3 && (int)position != 4)
{
int pawnPos1 = (int)position + 8;
board.Score -= Evaluation.CheckPawnWall(board, pawnPos1, (int)position);
int pawnPos2 = (int)position + 7;
board.Score -= Evaluation.CheckPawnWall(board, pawnPos2, (int)position);
int pawnPos3 = (int)position + 9;
board.Score -= Evaluation.CheckPawnWall(board, pawnPos3, (int)position);
}
}
if (square.Piece.PieceType == ChessPieceType.Knight)
{
++num;
if ((int)num > 1)
{
insufficientMaterial = false;
}
}
if ((int)bishopCount1 + (int)bishopCount2 > 1)
{
insufficientMaterial = false;
}
else if ((int)bishopCount1 + (int)knightCount1 > 1)
{
insufficientMaterial = false;
}
else if ((int)bishopCount2 + (int)knightCount2 > 1)
{
insufficientMaterial = false;
}
}
}
if (insufficientMaterial)
{
board.Score = 0;
board.StaleMate = true;
board.InsufficientMaterial = true;
}
else
{
if (board.EndGamePhase)
{
if (board.BlackCheck)
{
board.Score += 10;
}
else if (board.WhiteCheck)
{
board.Score -= 10;
}
}
else
{
if (!board.WhiteCanCastle && !board.WhiteCastled)
{
board.Score -= 50;
}
if (!board.BlackCanCastle && !board.BlackCastled)
{
board.Score += 50;
}
}
if ((int)Evaluation.blackPawnCount[0] >= 1 && (int)Evaluation.blackPawnCount[1] == 0)
{
board.Score += 12;
}
if ((int)Evaluation.blackPawnCount[1] >= 1 && (int)Evaluation.blackPawnCount[0] == 0 && (int)Evaluation.blackPawnCount[2] == 0)
{
board.Score += 14;
}
if ((int)Evaluation.blackPawnCount[2] >= 1 && (int)Evaluation.blackPawnCount[1] == 0 && (int)Evaluation.blackPawnCount[3] == 0)
{
board.Score += 16;
}
if ((int)Evaluation.blackPawnCount[3] >= 1 && (int)Evaluation.blackPawnCount[2] == 0 && (int)Evaluation.blackPawnCount[4] == 0)
{
board.Score += 20;
}
if ((int)Evaluation.blackPawnCount[4] >= 1 && (int)Evaluation.blackPawnCount[3] == 0 && (int)Evaluation.blackPawnCount[5] == 0)
{
board.Score += 20;
}
if ((int)Evaluation.blackPawnCount[5] >= 1 && (int)Evaluation.blackPawnCount[4] == 0 && (int)Evaluation.blackPawnCount[6] == 0)
{
board.Score += 16;
}
if ((int)Evaluation.blackPawnCount[6] >= 1 && (int)Evaluation.blackPawnCount[5] == 0 && (int)Evaluation.blackPawnCount[7] == 0)
{
board.Score += 14;
}
if ((int)Evaluation.blackPawnCount[7] >= 1 && (int)Evaluation.blackPawnCount[6] == 0)
{
board.Score += 12;
}
if ((int)Evaluation.whitePawnCount[0] >= 1 && (int)Evaluation.whitePawnCount[1] == 0)
{
board.Score -= 12;
}
if ((int)Evaluation.whitePawnCount[1] >= 1 && (int)Evaluation.whitePawnCount[0] == 0 && (int)Evaluation.whitePawnCount[2] == 0)
{
board.Score -= 14;
}
if ((int)Evaluation.whitePawnCount[2] >= 1 && (int)Evaluation.whitePawnCount[1] == 0 && (int)Evaluation.whitePawnCount[3] == 0)
{
board.Score -= 16;
}
if ((int)Evaluation.whitePawnCount[3] >= 1 && (int)Evaluation.whitePawnCount[2] == 0 && (int)Evaluation.whitePawnCount[4] == 0)
{
board.Score -= 20;
}
if ((int)Evaluation.whitePawnCount[4] >= 1 && (int)Evaluation.whitePawnCount[3] == 0 && (int)Evaluation.whitePawnCount[5] == 0)
{
board.Score -= 20;
}
if ((int)Evaluation.whitePawnCount[5] >= 1 && (int)Evaluation.whitePawnCount[4] == 0 && (int)Evaluation.whitePawnCount[6] == 0)
{
board.Score -= 16;
}
if ((int)Evaluation.whitePawnCount[6] >= 1 && (int)Evaluation.whitePawnCount[5] == 0 && (int)Evaluation.whitePawnCount[7] == 0)
{
board.Score -= 14;
}
if ((int)Evaluation.whitePawnCount[7] >= 1 && (int)Evaluation.whitePawnCount[6] == 0)
{
board.Score -= 12;
}
if ((int)Evaluation.blackPawnCount[0] >= 1 && (int)Evaluation.whitePawnCount[0] == 0)
{
board.Score -= (int)Evaluation.blackPawnCount[0];
}
if ((int)Evaluation.blackPawnCount[1] >= 1 && (int)Evaluation.whitePawnCount[1] == 0)
{
board.Score -= (int)Evaluation.blackPawnCount[1];
}
if ((int)Evaluation.blackPawnCount[2] >= 1 && (int)Evaluation.whitePawnCount[2] == 0)
{
board.Score -= (int)Evaluation.blackPawnCount[2];
}
if ((int)Evaluation.blackPawnCount[3] >= 1 && (int)Evaluation.whitePawnCount[3] == 0)
{
board.Score -= (int)Evaluation.blackPawnCount[3];
}
if ((int)Evaluation.blackPawnCount[4] >= 1 && (int)Evaluation.whitePawnCount[4] == 0)
{
board.Score -= (int)Evaluation.blackPawnCount[4];
}
if ((int)Evaluation.blackPawnCount[5] >= 1 && (int)Evaluation.whitePawnCount[5] == 0)
{
board.Score -= (int)Evaluation.blackPawnCount[5];
}
if ((int)Evaluation.blackPawnCount[6] >= 1 && (int)Evaluation.whitePawnCount[6] == 0)
{
board.Score -= (int)Evaluation.blackPawnCount[6];
}
if ((int)Evaluation.blackPawnCount[7] >= 1 && (int)Evaluation.whitePawnCount[7] == 0)
{
board.Score -= (int)Evaluation.blackPawnCount[7];
}
if ((int)Evaluation.whitePawnCount[0] >= 1 && (int)Evaluation.blackPawnCount[1] == 0)
{
board.Score += (int)Evaluation.whitePawnCount[0];
}
if ((int)Evaluation.whitePawnCount[1] >= 1 && (int)Evaluation.blackPawnCount[1] == 0)
{
board.Score += (int)Evaluation.whitePawnCount[1];
}
if ((int)Evaluation.whitePawnCount[2] >= 1 && (int)Evaluation.blackPawnCount[2] == 0)
{
board.Score += (int)Evaluation.whitePawnCount[2];
}
if ((int)Evaluation.whitePawnCount[3] >= 1 && (int)Evaluation.blackPawnCount[3] == 0)
{
board.Score += (int)Evaluation.whitePawnCount[3];
}
if ((int)Evaluation.whitePawnCount[4] >= 1 && (int)Evaluation.blackPawnCount[4] == 0)
{
board.Score += (int)Evaluation.whitePawnCount[4];
}
if ((int)Evaluation.whitePawnCount[5] >= 1 && (int)Evaluation.blackPawnCount[5] == 0)
{
board.Score += (int)Evaluation.whitePawnCount[5];
}
if ((int)Evaluation.whitePawnCount[6] >= 1 && (int)Evaluation.blackPawnCount[6] == 0)
{
board.Score += (int)Evaluation.whitePawnCount[6];
}
if ((int)Evaluation.whitePawnCount[7] >= 1 && (int)Evaluation.blackPawnCount[7] == 0)
{
board.Score += (int)Evaluation.whitePawnCount[7];
}
if ((int)board.EnPassantPosition != 0 || board.EndGamePhase || board.Score == 0)
{
return;
}
Zobrist.AddEntryEval(board.ZobristHash, board.Score);
}
}
}
/// <summary>
/// Apply a FEN string board setup to the board structure.
/// *EXCEPTION FREE FUNCTION*
/// </summary>
/// <param name="fenString">The string to set</param>
/// <param name="validate">If true, the fen string is validated, otherwise not</param>
/// <returns>
/// 0 = all ok.
/// -1 = Error in piece file layout parsing
/// -2 = Error in piece rank layout parsing
/// -3 = Unknown piece detected
/// -4 = Error while parsing moving side
/// -5 = Error while parsing castleling
/// -6 = Error while parsing en-passant square
/// -9 = FEN length exceeding maximum
/// </returns>
public FenError SetFen(string fenString, bool validate = false)
{
// TODO : Replace with stream at some point
// basic validation, catches format errors
if (validate)
{
Fen.Fen.Validate(fenString);
}
foreach (var square in Occupied)
{
Position.RemovePiece(square, Position.BoardLayout[square.AsInt()]);
}
//for (var i = 0; i <= PositionIndex; i++)
// _stateList[i].Clear();
Position.Clear();
var fen = new FenData(fenString);
Player player;
var c = fen.GetAdvance;
var f = 1; // file (column)
var r = 8; // rank (row)
// map pieces to data structure
while (c != 0 && !(f == 9 && r == 1))
{
if (char.IsDigit(c))
{
f += c - '0';
if (f > 9)
{
return(new FenError(-1, fen.Index));
}
c = fen.GetAdvance;
continue;
}
if (c == '/')
{
if (f != 9)
{
return(new FenError(-2, fen.Index));
}
r--;
f = 1;
c = fen.GetAdvance;
continue;
}
var pieceIndex = PieceExtensions.PieceChars.IndexOf(c);
if (pieceIndex == -1)
{
return(new FenError(-3, fen.Index));
}
player = char.IsLower(PieceExtensions.PieceChars[pieceIndex]);
var square = new Square(r - 1, f - 1);
AddPiece(square, player, (EPieceType)pieceIndex);
c = fen.GetAdvance;
f++;
}
if (!Fen.Fen.IsDelimiter(c))
{
return(new FenError(-4, fen.Index));
}
c = fen.GetAdvance;
player = c == 'w' ? 0 : 1;
if (player == -1)
{
return(new FenError(-4, fen.Index));
}
if (!Fen.Fen.IsDelimiter(fen.GetAdvance))
{
return(new FenError(-5, fen.Index));
}
if (!SetupCastleling(fen))
{
return(new FenError(-5, fen.Index));
}
if (!Fen.Fen.IsDelimiter(fen.GetAdvance))
{
return(new FenError(-6, fen.Index));
}
State.EnPassantSquare = fen.GetEpSquare();
// temporary.. the whole method should be using this, but this will do for now.
var moveCounters = fen.Fen.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
var first = moveCounters[moveCounters.Length - 2];
var second = moveCounters[moveCounters.Length - 1];
second.ToIntegral(out int number);
if (number > 0)
{
number -= 1;
}
PositionIndex = PositionStart = number;
first.ToIntegral(out number);
State = Position.State = _stateList[PositionIndex];
State.ReversibleHalfMoveCount = number;
State.SideToMove = player;
if (player.IsBlack())
{
var zobristSide = Zobrist.GetZobristSide();
State.Key ^= zobristSide;
State.PawnStructureKey ^= zobristSide;
}
State.Key ^= Zobrist.GetZobristCastleling(State.CastlelingRights);
if (State.EnPassantSquare != ESquare.none)
{
State.Key ^= Zobrist.GetZobristEnPessant(State.EnPassantSquare.File().AsInt());
}
Position.InCheck = Position.IsAttacked(Position.GetPieceSquare(EPieceType.King, State.SideToMove), ~State.SideToMove);
//State.GenerateMoves(true);
return(0);
}
public void HashSide() => Value ^= Zobrist.GetZobristSide();
public void Hash(int enPassantFile) => Value ^= Zobrist.GetZobristEnPessant(enPassantFile);
public void Hash(ECastleling castleling, ERank rank) => Value ^= Zobrist.GetZobristCastleling((int)rank);
public void Hash(Piece piece, Square square) => Value ^= Zobrist.GetZobristPst(piece, square);
public void Xor(ref Zobrist zobr1, ref Zobrist zobr2)
{
key = zobr1.key ^ zobr2.key;
lock0 = zobr1.lock0 ^ zobr2.lock0;
lock1 = zobr1.lock1 ^ zobr2.lock1;
}
/// <summary>
/// 执行异或操作
/// </summary>
/// <param name="zobr"></param>
public void Xor(ref Zobrist zobr)
{
key ^= zobr.key;
lock0 ^= zobr.lock0;
lock1 ^= zobr.lock1;
}
public static void Init()
{
Zobrist.Init();
Bitboard.Init();
}
internal Board(string fen)
: this()
{
byte num1 = 0;
byte num2 = 0;
this.WhiteCastled = true;
this.BlackCastled = true;
byte num3 = 0;
this.WhoseMove = ChessPieceColor.White;
if (fen.Contains("a3"))
{
this.EnPassantColor = ChessPieceColor.White;
this.EnPassantPosition = (byte)40;
}
else if (fen.Contains("b3"))
{
this.EnPassantColor = ChessPieceColor.White;
this.EnPassantPosition = (byte)41;
}
else if (fen.Contains("c3"))
{
this.EnPassantColor = ChessPieceColor.White;
this.EnPassantPosition = (byte)42;
}
else if (fen.Contains("d3"))
{
this.EnPassantColor = ChessPieceColor.White;
this.EnPassantPosition = (byte)43;
}
else if (fen.Contains("e3"))
{
this.EnPassantColor = ChessPieceColor.White;
this.EnPassantPosition = (byte)44;
}
else if (fen.Contains("f3"))
{
this.EnPassantColor = ChessPieceColor.White;
this.EnPassantPosition = (byte)45;
}
else if (fen.Contains("g3"))
{
this.EnPassantColor = ChessPieceColor.White;
this.EnPassantPosition = (byte)46;
}
else if (fen.Contains("h3"))
{
this.EnPassantColor = ChessPieceColor.White;
this.EnPassantPosition = (byte)47;
}
if (fen.Contains("a6"))
{
this.EnPassantColor = ChessPieceColor.Black;
this.EnPassantPosition = (byte)16;
}
else if (fen.Contains("b6"))
{
this.EnPassantColor = ChessPieceColor.Black;
this.EnPassantPosition = (byte)17;
}
else if (fen.Contains("c6"))
{
this.EnPassantColor = ChessPieceColor.Black;
this.EnPassantPosition = (byte)18;
}
else if (fen.Contains("d6"))
{
this.EnPassantColor = ChessPieceColor.Black;
this.EnPassantPosition = (byte)19;
}
else if (fen.Contains("e6"))
{
this.EnPassantColor = ChessPieceColor.Black;
this.EnPassantPosition = (byte)20;
}
else if (fen.Contains("f6"))
{
this.EnPassantColor = ChessPieceColor.Black;
this.EnPassantPosition = (byte)21;
}
else if (fen.Contains("g6"))
{
this.EnPassantColor = ChessPieceColor.Black;
this.EnPassantPosition = (byte)22;
}
else if (fen.Contains("h6"))
{
this.EnPassantColor = ChessPieceColor.Black;
this.EnPassantPosition = (byte)23;
}
if (fen.Contains(" w "))
{
this.WhoseMove = ChessPieceColor.White;
}
if (fen.Contains(" b "))
{
this.WhoseMove = ChessPieceColor.Black;
}
foreach (char ch in fen)
{
if ((int)num1 < 64 && (int)num2 == 0)
{
if ((int)ch == 49 && (int)num1 < 63)
{
++num1;
}
else if ((int)ch == 50 && (int)num1 < 62)
{
num1 += (byte)2;
}
else if ((int)ch == 51 && (int)num1 < 61)
{
num1 += (byte)3;
}
else if ((int)ch == 52 && (int)num1 < 60)
{
num1 += (byte)4;
}
else if ((int)ch == 53 && (int)num1 < 59)
{
num1 += (byte)5;
}
else if ((int)ch == 54 && (int)num1 < 58)
{
num1 += (byte)6;
}
else if ((int)ch == 55 && (int)num1 < 57)
{
num1 += (byte)7;
}
else if ((int)ch == 56 && (int)num1 < 56)
{
num1 += (byte)8;
}
else if ((int)ch == 80)
{
this.Squares[(int)num1].Piece = new Piece(ChessPieceType.Pawn, ChessPieceColor.White);
this.Squares[(int)num1].Piece.Moved = true;
++num1;
}
else if ((int)ch == 78)
{
this.Squares[(int)num1].Piece = new Piece(ChessPieceType.Knight, ChessPieceColor.White);
this.Squares[(int)num1].Piece.Moved = true;
++num1;
}
else if ((int)ch == 66)
{
this.Squares[(int)num1].Piece = new Piece(ChessPieceType.Bishop, ChessPieceColor.White);
this.Squares[(int)num1].Piece.Moved = true;
++num1;
}
else if ((int)ch == 82)
{
this.Squares[(int)num1].Piece = new Piece(ChessPieceType.Rook, ChessPieceColor.White);
this.Squares[(int)num1].Piece.Moved = true;
++num1;
}
else if ((int)ch == 81)
{
this.Squares[(int)num1].Piece = new Piece(ChessPieceType.Queen, ChessPieceColor.White);
this.Squares[(int)num1].Piece.Moved = true;
++num1;
}
else if ((int)ch == 75)
{
this.Squares[(int)num1].Piece = new Piece(ChessPieceType.King, ChessPieceColor.White);
this.Squares[(int)num1].Piece.Moved = true;
++num1;
}
else if ((int)ch == 112)
{
this.Squares[(int)num1].Piece = new Piece(ChessPieceType.Pawn, ChessPieceColor.Black);
this.Squares[(int)num1].Piece.Moved = true;
++num1;
}
else if ((int)ch == 110)
{
this.Squares[(int)num1].Piece = new Piece(ChessPieceType.Knight, ChessPieceColor.Black);
this.Squares[(int)num1].Piece.Moved = true;
++num1;
}
else if ((int)ch == 98)
{
this.Squares[(int)num1].Piece = new Piece(ChessPieceType.Bishop, ChessPieceColor.Black);
this.Squares[(int)num1].Piece.Moved = true;
++num1;
}
else if ((int)ch == 114)
{
this.Squares[(int)num1].Piece = new Piece(ChessPieceType.Rook, ChessPieceColor.Black);
this.Squares[(int)num1].Piece.Moved = true;
++num1;
}
else if ((int)ch == 113)
{
this.Squares[(int)num1].Piece = new Piece(ChessPieceType.Queen, ChessPieceColor.Black);
this.Squares[(int)num1].Piece.Moved = true;
++num1;
}
else if ((int)ch == 107)
{
this.Squares[(int)num1].Piece = new Piece(ChessPieceType.King, ChessPieceColor.Black);
this.Squares[(int)num1].Piece.Moved = true;
++num1;
}
else if ((int)ch != 47 && (int)ch == 32)
{
++num2;
}
}
else if ((int)ch == 75)
{
if (this.Squares[60].Piece != null && this.Squares[60].Piece.PieceType == ChessPieceType.King)
{
this.Squares[60].Piece.Moved = false;
}
if (this.Squares[63].Piece != null && this.Squares[63].Piece.PieceType == ChessPieceType.Rook)
{
this.Squares[63].Piece.Moved = false;
}
this.WhiteCastled = false;
}
else if ((int)ch == 81)
{
if (this.Squares[60].Piece != null && this.Squares[60].Piece.PieceType == ChessPieceType.King)
{
this.Squares[60].Piece.Moved = false;
}
if (this.Squares[56].Piece != null && this.Squares[56].Piece.PieceType == ChessPieceType.Rook)
{
this.Squares[56].Piece.Moved = false;
}
this.WhiteCastled = false;
}
else if ((int)ch == 107)
{
if (this.Squares[4].Piece != null && this.Squares[4].Piece.PieceType == ChessPieceType.King)
{
this.Squares[4].Piece.Moved = false;
}
if (this.Squares[7].Piece != null && this.Squares[7].Piece.PieceType == ChessPieceType.Rook)
{
this.Squares[7].Piece.Moved = false;
}
this.BlackCastled = false;
}
else if ((int)ch == 113)
{
if (this.Squares[4].Piece != null && this.Squares[4].Piece.PieceType == ChessPieceType.King)
{
this.Squares[4].Piece.Moved = false;
}
if (this.Squares[0].Piece != null && this.Squares[0].Piece.PieceType == ChessPieceType.Rook)
{
this.Squares[0].Piece.Moved = false;
}
this.BlackCastled = false;
}
else if ((int)ch == 32)
{
++num3;
}
else if ((int)ch == 49 && (int)num3 == 4)
{
this.FiftyMove = (byte)((int)this.FiftyMove * 10 + 1);
}
else if ((int)ch == 50 && (int)num3 == 4)
{
this.FiftyMove = (byte)((int)this.FiftyMove * 10 + 2);
}
else if ((int)ch == 51 && (int)num3 == 4)
{
this.FiftyMove = (byte)((int)this.FiftyMove * 10 + 3);
}
else if ((int)ch == 52 && (int)num3 == 4)
{
this.FiftyMove = (byte)((int)this.FiftyMove * 10 + 4);
}
else if ((int)ch == 53 && (int)num3 == 4)
{
this.FiftyMove = (byte)((int)this.FiftyMove * 10 + 5);
}
else if ((int)ch == 54 && (int)num3 == 4)
{
this.FiftyMove = (byte)((int)this.FiftyMove * 10 + 6);
}
else if ((int)ch == 55 && (int)num3 == 4)
{
this.FiftyMove = (byte)((int)this.FiftyMove * 10 + 7);
}
else if ((int)ch == 56 && (int)num3 == 4)
{
this.FiftyMove = (byte)((int)this.FiftyMove * 10 + 8);
}
else if ((int)ch == 57 && (int)num3 == 4)
{
this.FiftyMove = (byte)((int)this.FiftyMove * 10 + 9);
}
else if ((int)ch == 48 && (int)num3 == 4)
{
this.MoveCount = (int)(byte)(this.MoveCount * 10 + 0);
}
else if ((int)ch == 49 && (int)num3 == 5)
{
this.MoveCount = (int)(byte)(this.MoveCount * 10 + 1);
}
else if ((int)ch == 50 && (int)num3 == 5)
{
this.MoveCount = (int)(byte)(this.MoveCount * 10 + 2);
}
else if ((int)ch == 51 && (int)num3 == 5)
{
this.MoveCount = (int)(byte)(this.MoveCount * 10 + 3);
}
else if ((int)ch == 52 && (int)num3 == 5)
{
this.MoveCount = (int)(byte)(this.MoveCount * 10 + 4);
}
else if ((int)ch == 53 && (int)num3 == 5)
{
this.MoveCount = (int)(byte)(this.MoveCount * 10 + 5);
}
else if ((int)ch == 54 && (int)num3 == 5)
{
this.MoveCount = (int)(byte)(this.MoveCount * 10 + 6);
}
else if ((int)ch == 55 && (int)num3 == 5)
{
this.MoveCount = (int)(byte)(this.MoveCount * 10 + 7);
}
else if ((int)ch == 56 && (int)num3 == 5)
{
this.MoveCount = (int)(byte)(this.MoveCount * 10 + 8);
}
else if ((int)ch == 57 && (int)num3 == 5)
{
this.MoveCount = (int)(byte)(this.MoveCount * 10 + 9);
}
else if ((int)ch == 48 && (int)num3 == 5)
{
this.MoveCount = (int)(byte)(this.MoveCount * 10 + 0);
}
}
Zobrist.InitiateZobristTable();
this.ZobristHash = Zobrist.CalculateZobristHash(this);
}
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);
}