Fix handling of en passant; reported by Phil Miller.

diff --git a/www/js/remoteglot.js b/www/js/remoteglot.js
index a5cdc232a61ce3a6cfa2b90508411b467b4e6202..d63b3789d07b0440372749e8228fb565f35d180c 100644 (file)
--- a/www/js/remoteglot.js
+++ b/www/js/remoteglot.js
@@ -762,15 +762,28 @@ var update_displayed_line = function() {
 
        hiddenboard.position(current_display_line.start_fen, false);
        for (var i = 0; i <= current_display_move; ++i) {
 
        hiddenboard.position(current_display_line.start_fen, false);
        for (var i = 0; i <= current_display_move; ++i) {

+               var pos = hiddenboard.position();

                var move = current_display_line.uci_pv[i];
                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);
                var promo = move.substr(4, 1);

-               move = move.substr(0, 2) + "-" + move.substr(2, 2);
+
+               // 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);
 
                // Do promotion if needed.
                if (promo != "") {
                hiddenboard.move(move, false);
 
                // 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);
                }
                        pos[target] = pos[target].substr(0, 1) + promo.toUpperCase();
                        hiddenboard.position(pos, false);
                }