- getPotentialKingMoves(sq) {
- // Initialize with normal (non-capturing) moves
- let noCaptures = this.getSlideNJumpMoves(
- sq,
- V.steps[V.ROOK].concat(V.steps[V.BISHOP]),
- "oneStep"
- );
- return noCaptures.concat(this.getCastleMoves(sq));
+ // Nothing on final squares, except maybe king and castling rook?
+ for (i = 0; i < 2; i++) {
+ if (
+ this.board[x][finalSquares[castleSide][i]] != V.EMPTY &&
+ this.getPiece(x, finalSquares[castleSide][i]) != V.KING &&
+ finalSquares[castleSide][i] != rookPos
+ ) {
+ continue castlingCheck;
+ }
+ }
+
+ // If this code is reached, castle is valid
+ moves.push(
+ new Move({
+ appear: [
+ new PiPo({ x: x, y: finalSquares[castleSide][0], p: V.KING, c: c }),
+ new PiPo({ x: x, y: finalSquares[castleSide][1], p: V.ROOK, c: c })
+ ],
+ vanish: [
+ new PiPo({ x: x, y: y, p: V.KING, c: c }),
+ new PiPo({ x: x, y: rookPos, p: V.ROOK, c: c })
+ ],
+ end:
+ Math.abs(y - rookPos) <= 2
+ ? { x: x, y: rookPos }
+ : { x: x, y: y + 2 * (castleSide == 0 ? -1 : 1) }
+ })
+ );
+ }
+
+ return moves;