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require empty squares (both sides) between king and rook to castle

This commit is contained in:
Jesse D. McDonald 2020-03-15 13:03:39 -05:00
parent baf4c19f1d
commit def7ccdbcb
1 changed files with 6 additions and 0 deletions
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6
js/chess.js
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@ -161,18 +161,24 @@ function legalMoves(board, side, type, from, canCapture){
scanPath(legals, board, side, from, false, dir[0], dir[1], 0);
}
if (from[0] === 'e' && from[1] === (isDark(side) ? '8' : '1')) {
const other = otherSide(side);
/* check for castling conditions */
if (!hasMoved(board, side, from)) {
if (boardGet(board, 'f' + from[1], side) === ' ' &&
boardGet(board, 'f' + from[1], other) === ' ' &&
boardGet(board, 'g' + from[1], side) === ' ' &&
boardGet(board, 'g' + from[1], other) === ' ' &&
boardGet(board, 'h' + from[1], side) === 'r') {
if (!hasMoved(board, side, 'h' + from[1])) {
legals.push('g' + from[1]);
}
}
if (boardGet(board, 'd' + from[1], side) === ' ' &&
boardGet(board, 'd' + from[1], other) === ' ' &&
boardGet(board, 'c' + from[1], side) === ' ' &&
boardGet(board, 'c' + from[1], other) === ' ' &&
boardGet(board, 'b' + from[1], side) === ' ' &&
boardGet(board, 'b' + from[1], other) === ' ' &&
boardGet(board, 'a' + from[1], side) === 'r') {
if (!hasMoved(board, side, 'a' + from[1])) {
legals.push('c' + from[1]);