- var pos = hiddenboard.position();
- var move = current_display_line.uci_pv[i];
- var source = move.substr(0, 2);
- var target = move.substr(2, 2);
- var promo = move.substr(4, 1);
-
- // Check if we need to do en passant.
- var piece = pos[source];
- if (piece == "wP" || piece == "bP") {
- if (source.substr(0, 1) != target.substr(0, 1) &&
- pos[target] === undefined) {
- var ep_square = target.substr(0, 1) + source.substr(1, 1);
- delete pos[ep_square];
- hiddenboard.position(pos, false);
- }
- }
-
- move = source + "-" + target;
- hiddenboard.move(move, false);
- pos = hiddenboard.position();
-
- // Do promotion if needed.
- if (promo != "") {
- 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);
- }