public override List <Move> getLegalMoves(Board board)
{
List <Move> legalMoves = new List <Move>();
foreach (int argument in Knight.legalMoveArguments)
{
int unCheckedPosition = this.piecePosition + argument;
if (!BoardUtils.checkedForLegalPosition(unCheckedPosition) ||
Knight.firstColumnViolation(this.piecePosition, argument) ||
Knight.secondColumnViolation(this.piecePosition, argument) ||
Knight.seventhColumnViolation(this.piecePosition, argument) ||
Knight.eightColumnViolation(this.piecePosition, argument))
{
continue;
}
else
{
Cell currentCell = board.getCell(unCheckedPosition);
if (!currentCell.isCellOccupied())
{
legalMoves.Add(new NormalMove(board, this, unCheckedPosition));
}
else
{
if (this.pieceSide != currentCell.getPiece().getSide())
{
legalMoves.Add(new AttackMove(board, this, unCheckedPosition, currentCell.getPiece()));
}
}
}
}
return(legalMoves);
}
private int maxValue(Board board, int depth, int alpha, int beta)
{
if (depth == 0 || BoardUtils.isBoardinStaleMateorCheckMate(board))
{
return(this.heuristic.calculate(board, depth));
}
int value = Int32.MinValue;
//Find state in transposition table
int key = this.table.hash(board);
if (this.table.getNode(key, depth, board) != null)
{
return(this.table.getNode(key, depth, board).Value);
}
//If the current state is not in TT then run minimax;
Move bestMove = null;
foreach (Move move in board.CurrentPlayer.getLegalMoves())
{
nodeCount++;
MoveTransition trans = board.CurrentPlayer.makeMove(move);
if (trans.getMoveStatus().isDone())
{
int temp = minValue(trans.ToBoard, depth - 1, alpha, beta);
if (temp > value)
{
value = temp;
bestMove = move;
}
if (value > beta)
{
this.table.add(key, new Node(bestMove, value, depth, board));
return(value);
}
alpha = Math.Max(alpha, value);
}
}
this.table.add(key, new Node(bestMove, value, depth, board));
return(value);
}
public override List <Move> getLegalMoves(Board board)
{
List <Move> legalMove = new List <Move>();
foreach (int argument in King.legalMoveArguments)
{
int unCheckedPosition = this.piecePosition + argument;
if (!BoardUtils.checkedForLegalPosition(unCheckedPosition) ||
King.firstColumnViolation(this.piecePosition, argument) ||
King.eightColumnViolation(this.piecePosition, argument))
{
continue;
}
else
{
Cell currentCell = board.getCell(unCheckedPosition);
if (!currentCell.isCellOccupied())
{
legalMove.Add(new NormalMove(board, this, unCheckedPosition));
}
else
{
if (this.pieceSide != currentCell.getPiece().getSide())
{
legalMove.Add(new AttackMove(board, this, unCheckedPosition, currentCell.getPiece()));
}
}
}
}
if (board.CurrentPlayer != null)
{
List <Move> currentPlayerMove = board.CurrentPlayer.getLegalMoves();
List <Move> opponentPlayerMove = board.CurrentPlayer.getOpponent().getLegalMoves();
legalMove.AddRange(board.CurrentPlayer.calculateKingCastles(currentPlayerMove, opponentPlayerMove));
}
return(legalMove);
}
public override List <Move> getLegalMoves(Board board)
{
List <Move> legalMoves = new List <Move>();
foreach (int argument in Bishop.legalMovesArguments)
{
int unCheckedPosition = this.piecePosition;
while (BoardUtils.checkedForLegalPosition(unCheckedPosition))
{
if (firstColumnViolation(unCheckedPosition, argument) ||
eightColumnViolation(unCheckedPosition, argument))
{
break;
}
unCheckedPosition += argument;
if (BoardUtils.checkedForLegalPosition(unCheckedPosition))
{
Cell currentCell = board.getCell(unCheckedPosition);
if (!currentCell.isCellOccupied())
{
legalMoves.Add(new NormalMove(board, this, unCheckedPosition));
}
else
{
if (this.pieceSide != currentCell.getPiece().getSide())
{
legalMoves.Add(new AttackMove(board, this, unCheckedPosition, currentCell.getPiece()));
}
break;
}
}
}
}
return(legalMoves);
}
public override List <Move> getLegalMoves(Board board)
{
List <Move> legalMoves = new List <Move>();
foreach (int argument in legalMoveArguments)
{
int unCheckedPosition = this.piecePosition + (this.direction * argument);
if (!BoardUtils.checkedForLegalPosition(unCheckedPosition))
{
continue;
}
if (argument == 8 && !board.getCell(unCheckedPosition).isCellOccupied())
{
if (this.isPromotionSquare(unCheckedPosition))
{
legalMoves.Add(new PawnPromotionMove(new NormalMove(board, this, unCheckedPosition), this.getPromotionPiece(PieceType.ROOK)));
legalMoves.Add(new PawnPromotionMove(new NormalMove(board, this, unCheckedPosition), this.getPromotionPiece(PieceType.KNIGHT)));
legalMoves.Add(new PawnPromotionMove(new NormalMove(board, this, unCheckedPosition), this.getPromotionPiece(PieceType.BISHOP)));
legalMoves.Add(new PawnPromotionMove(new NormalMove(board, this, unCheckedPosition), this.getPromotionPiece()));
}
else
{
legalMoves.Add(new PawnMove(board, this, unCheckedPosition));
}
}
if (argument == 16 && this.isFirstMove() &&
(this.piecePosition / 8 == 1 && this.isBlack() ||
this.piecePosition / 8 == 6 && this.isWhite()))
{
int behindPosition = this.piecePosition + (this.direction * 8);
if (!board.getCell(unCheckedPosition).isCellOccupied() &&
!board.getCell(behindPosition).isCellOccupied())
{
legalMoves.Add(new PawnJump(board, this, unCheckedPosition));
}
}
if (argument == 9 &&
!((this.piecePosition % 8 == 7 && this.isBlack() ||
(this.piecePosition % 8 == 0 && this.isWhite()))))
{
if (board.getCell(unCheckedPosition).isCellOccupied())
{
Piece occupiedPiece = board.getCell(unCheckedPosition).getPiece();
if (occupiedPiece.getSide() != this.getSide())
{
if (this.isPromotionSquare(unCheckedPosition))
{
legalMoves.Add(new PawnPromotionMove(new PawnAttackMove(board, this, unCheckedPosition, occupiedPiece), this.getPromotionPiece(PieceType.ROOK)));
legalMoves.Add(new PawnPromotionMove(new PawnAttackMove(board, this, unCheckedPosition, occupiedPiece), this.getPromotionPiece(PieceType.KNIGHT)));
legalMoves.Add(new PawnPromotionMove(new PawnAttackMove(board, this, unCheckedPosition, occupiedPiece), this.getPromotionPiece(PieceType.BISHOP)));
legalMoves.Add(new PawnPromotionMove(new PawnAttackMove(board, this, unCheckedPosition, occupiedPiece), this.getPromotionPiece()));
}
else
{
legalMoves.Add(new PawnAttackMove(board, this, unCheckedPosition, occupiedPiece));
}
}
}
else if (board.getEnPassantPawn() != null)
{
if (board.getEnPassantPawn().getPiecePosition() == this.piecePosition - (this.direction * -1))
{
Piece enPassantPiece = board.getEnPassantPawn();
if (this.getSide() != enPassantPiece.getSide())
{
legalMoves.Add(new PawnEnPassantAttackMove(board, this, unCheckedPosition, enPassantPiece));
}
}
}
}
if (argument == 7 &&
!((this.piecePosition % 8 == 0 && this.isBlack() ||
(this.piecePosition % 8 == 7 && this.isWhite()))))
{
if (board.getCell(unCheckedPosition).isCellOccupied())
{
Piece occupiedPiece = board.getCell(unCheckedPosition).getPiece();
if (occupiedPiece.getSide() != this.getSide())
{
if (this.isPromotionSquare(unCheckedPosition))
{
legalMoves.Add(new PawnPromotionMove(new PawnAttackMove(board, this, unCheckedPosition, occupiedPiece), this.getPromotionPiece(PieceType.ROOK)));
legalMoves.Add(new PawnPromotionMove(new PawnAttackMove(board, this, unCheckedPosition, occupiedPiece), this.getPromotionPiece(PieceType.KNIGHT)));
legalMoves.Add(new PawnPromotionMove(new PawnAttackMove(board, this, unCheckedPosition, occupiedPiece), this.getPromotionPiece(PieceType.BISHOP)));
legalMoves.Add(new PawnPromotionMove(new PawnAttackMove(board, this, unCheckedPosition, occupiedPiece), this.getPromotionPiece()));
}
else
{
legalMoves.Add(new PawnAttackMove(board, this, unCheckedPosition, occupiedPiece));
}
}
}
else if (board.getEnPassantPawn() != null)
{
if (board.getEnPassantPawn().getPiecePosition() == this.piecePosition + (this.direction * -1))
{
Piece enPassantPiece = board.getEnPassantPawn();
if (this.getSide() != enPassantPiece.getSide())
{
legalMoves.Add(new PawnEnPassantAttackMove(board, this, unCheckedPosition, enPassantPiece));
}
}
}
}
}
return(legalMoves);
}
public override string ToString()
{
return(BoardUtils.getPositionAtCoordinate(this.DesCoordinate));
}
public override string ToString()
{
return(BoardUtils.getPositionAtCoordinate(this.getCurrentCoordinate()) + " " + this.getAttackedPiece().getPieceType().getPieceName()
+ BoardUtils.getPositionAtCoordinate(this.getAttackedPiece().getPiecePosition()));
}
public override string ToString()
{
return(this.piece.getPieceType().getPieceName() + BoardUtils.getPositionAtCoordinate(this.getCurrentCoordinate()) + " "
+ BoardUtils.getPositionAtCoordinate(this.DesCoordinate));
}
