+
+ // Do promotion if needed.
+ if (promo != "") {
+ var pos = hiddenboard.position();
+ var target = move.substr(3, 2);
+ pos[target] = pos[target].substr(0, 1) + promo.toUpperCase();
+ hiddenboard.position(pos, false);
+ }
+
+ // chessboard.js does not automatically move the rook on castling
+ // (issue #51; marked as won't fix), so update it ourselves.
+ if (move == "e1-g1" && hiddenboard.position().g1 == "wK") { // white O-O
+ hiddenboard.move("h1-f1", false);
+ } else if (move == "e1-c1" && hiddenboard.position().c1 == "wK") { // white O-O-O
+ hiddenboard.move("a1-d1", false);
+ } else if (move == "e8-g8" && hiddenboard.position().g8 == "bK") { // black O-O
+ hiddenboard.move("h8-f8", false);
+ } else if (move == "e8-c8" && hiddenboard.position().c8 == "bK") { // black O-O-O
+ hiddenboard.move("a8-d8", false);
+ }