static public List <int> GetPossibleMoveList(PositionManager board, int square, bool isPlayer)
{
List <int> moveList = new List <int>();
ulong bitboard = GetPossibleMoveBitboard(board, square);
for (int i = 0; i < 64; i++)
{
if ((bitboard & Util.GetBitBoardFromSquare(i)) != 0)
{
if (isPlayer) //"Check" control for player only to improve ai speed
{
PositionManager fictionnalBoard = new PositionManager(board);
fictionnalBoard.MovePiece(square, i);
if (!fictionnalBoard.IsCheck())
{
moveList.Add(i);
}
}
else
{
moveList.Add(i);
}
}
}
return(moveList);
}
static public ulong GetPossibleMoveBitboard(PositionManager board, int square)
{
ulong positionBitboard = Util.GetBitBoardFromSquare(square);
foreach (PieceEnum type in (PieceEnum[])Enum.GetValues(typeof(PieceEnum)))
{
if ((board.whitePositions[type] & positionBitboard) != 0 || (board.blackPositions[type] & positionBitboard) != 0)
{
ulong alliedPositions;
if ((board.whitePositions[type] & positionBitboard) != 0)
{
alliedPositions = board.GetAllWhite();
}
else
{
alliedPositions = board.GetAllBlack();
}
switch (type)
{
case PieceEnum.Pawn:
if ((board.whitePositions[type] & positionBitboard) != 0)
{
return(whitePawnMoveboards[square][GetWhitePawnIndexFromBoard(board.GetAll(), square)] & ~alliedPositions);
}
else
{
return(blackPawnMoveboards[square][GetBlackPawnIndexFromBoard(board.GetAll(), square)] & ~alliedPositions);
}
case PieceEnum.Knight:
return(pieceMovements[PieceEnum.Knight][square] & ~alliedPositions);
case PieceEnum.Bishop:
return(bishopMoveboards[square][GetBishopIndexFromBoard(board.GetAll(), square)] & ~alliedPositions);
case PieceEnum.Rook:
return(rookMoveboards[square][GetRookIndexFromBoard(board.GetAll(), square)] & ~alliedPositions);
case PieceEnum.Queen:
return((bishopMoveboards[square][GetBishopIndexFromBoard(board.GetAll(), square)] | rookMoveboards[square][GetRookIndexFromBoard(board.GetAll(), square)]) & ~alliedPositions);
case PieceEnum.King:
return(pieceMovements[PieceEnum.King][square] & ~alliedPositions);
default:
break;
}
}
}
return(0);
}
static public List <(int, int)> GetAllPossibleMoves(PositionManager board, bool isPlayer, bool isFalsePlayer)
{
List <(int, int)> allPossibleMoves = new List <(int, int)>();
ulong alliedPositions = (isPlayer || isFalsePlayer) ? board.GetAllWhite() : board.GetAllBlack();
for (int i = 63; i >= 0; i--)
{
if ((alliedPositions & 1UL) == 1)
{
List <int> possibleMoves = MoveManager.GetPossibleMoveList(board, i, isPlayer);
foreach (int target in possibleMoves)
{
allPossibleMoves.Add((i, target));
}
}
alliedPositions = alliedPositions >> 1;
}
return(allPossibleMoves);
}
public PositionManager(PositionManager pm) //create a copy
{
this.blackPositions = new Dictionary <PieceEnum, ulong>(pm.blackPositions);
this.whitePositions = new Dictionary <PieceEnum, ulong>(pm.whitePositions);
}