+ isAttacked(sq, colors) {
+ if (super.isAttacked(sq, colors))
+ return true;
+
+ // Check if a (non-knight) piece at knight distance
+ // is guarded by a knight (and thus attacking)
+ const x = sq[0],
+ y = sq[1];
+ for (const step of V.steps[V.KNIGHT]) {
+ if (
+ V.OnBoard(x+step[0],y+step[1]) &&
+ colors.includes(this.getColor(x+step[0],y+step[1])) &&
+ this.getPiece(x+step[0],y+step[1]) != V.KNIGHT
+ ) {
+ for (const step2 of V.steps[V.KNIGHT]) {
+ const xx = x+step[0]+step2[0],
+ yy = y+step[1]+step2[1];
+ if (
+ V.OnBoard(xx,yy) &&
+ colors.includes(this.getColor(xx,yy)) &&
+ this.getPiece(xx,yy) == V.KNIGHT
+ ) {
+ return true;
+ }
+ }
+ }
+ }
+
+ return false;
+ }
+
projects / vchess.git / commitdiff
