public boolean isLegal(Position position, Move move) {
final HashSet<MoveVector> possibleVectors = getPossibleVectors();
final MoveVector moveVector = new MoveVector(move);
final Square s1 = move.getStartSquare();
final Square s2 = move.getEndSquare();
final PieceType pieceType = position.getPieceAt(move.getStartSquare()).getType();
if (pieceType.equals(PieceType.PAWN)) {
return false;
}
if (!position.isMovablePieceAtSquare(s1)) {
return false;
}
if (position.isCaptureOfOwnColor(move)) {
return false;
}
if (!move.getPromotionPieceType().equals(PieceType.NONE)) {
return false;
}
if (!possibleVectors.contains(moveVector)) {
return false;
}
if (!possibleVectors.contains(moveVector)) {
return false;
}
for (final Square square : Chess.getSquaresBetween(s1, s2, false)) {
if (!position.getPieceAt(square).equals(Piece.NONE)) {
return false;
}
}
return true;
}
/** Determines whether a particular square is attacked by a piece of the given color. */
public boolean isAttackedByColor(Square target, PieceColor color) {
MoveLogic simpleChessLogic = new SimpleChessLogic();
Position modPosition;
if (this.getPieceAt(target).getColor().invert() != color) {
return false;
}
if (this.getColorToMove() != color) {
modPosition = new Position(this);
modPosition.setColorToMove(color);
} else {
modPosition = this;
}
for (int i = 0; i < Chess.BOARD_SIZE; i++) {
for (int j = 0; j < Chess.BOARD_SIZE; j++) {
final Square source = new Square(i, j);
final Move move = new Move(source, target);
if (simpleChessLogic.isLegal(this, move)) {
return true;
}
}
}
return false;
}
public boolean apply(Position position, Move move) {
position.movePiece(move);
position.updateCastlingRights(move);
position.updateBackgroundInfo(position.isCapture(move));
return true;
}
/**
* Determines whether the king with the move is currently attacked by a piece of the opposite
* color.
*/
public boolean isKingToMoveInCheck() {
Position opponentToMovePosition = new Position(this);
opponentToMovePosition.setColorToMove(this.getColorToMove().invert());
return opponentToMovePosition.isKingLeftInCheck();
}