private static BitBoard makeWithoutFileH() {
BitBoard result = new BitBoard();
for (BoardSquare s : BoardSquare.values()) {
if (s.file() != 'h') {
result.set(s);
}
}
return result;
}
public static BitBoard makeKnightMoves(BoardSquare kn) {
BitBoard result = new BitBoard();
for (BoardSquare bs : BoardSquare.values()) {
if (kn.hasKnightMoveTo(bs)) {
result.set(bs);
}
}
return result;
}
private static BitBoard makeInteriorSquares() {
BitBoard result = new BitBoard();
for (BoardSquare bs : BoardSquare.values()) {
if (!bs.onEdge()) {
result.set(bs);
}
}
return result;
}
public static BitBoard makeBishopMoves(BoardSquare bish) {
BitBoard result = new BitBoard();
for (BoardSquare bs : BoardSquare.values()) {
if (bish.hasBishopMoveTo(bs)) {
result.set(bs);
}
}
return result;
}
public BitBoard pawnCaptureWest(PieceColor mover) {
BitBoard result = new BitBoard(this);
if (mover.equals(PieceColor.WHITE)) {
result.bits >>>= 9;
} else {
result.bits <<= 7;
}
return result.intersection(NO_FILE_H);
}
public static BitBoard makeRookMoves(BoardSquare rook) {
BitBoard result = new BitBoard();
for (BoardSquare bs : BoardSquare.values()) {
if (rook.hasRookMoveTo(bs)) {
result.set(bs);
}
}
return result;
}
public BitBoard pawnAdvance(PieceColor mover) {
BitBoard result = new BitBoard(this);
if (mover.equals(PieceColor.WHITE)) {
result.bits >>>= 8;
} else {
result.bits <<= 8;
}
return result;
}
public static BitBoard makeQueenMoves(BoardSquare queen) {
BitBoard result = makeRookMoves(queen);
return result.union(makeBishopMoves(queen));
}
public BitBoard negation() {
BitBoard result = new BitBoard();
result.bits = ~this.bits;
return result;
}
public BitBoard symmetricDifference(BitBoard that) {
BitBoard result = new BitBoard(this);
result.removeIntersection(that);
return result;
}
public BitBoard union(BitBoard that) {
BitBoard result = new BitBoard(this);
result.addAll(that);
return result;
}
public BitBoard intersection(BitBoard that) {
BitBoard result = new BitBoard(this);
result.retainAll(that);
return result;
}