Fix Alice chess

[vchess.git] / public / javascripts / variants / Checkered.js

diff --git a/public/javascripts/variants/Checkered.js b/public/javascripts/variants/Checkered.js
index 4f523ed..f1cf771 100644 (file)
--- a/public/javascripts/variants/Checkered.js
+++ b/public/javascripts/variants/Checkered.js
@@ -1,6 +1,5 @@
 class CheckeredRules extends ChessRules
 {
-       // Path to pieces
        static getPpath(b)
        {
                return b[0]=='c' ? "Checkered/"+b : b;
@@ -72,6 +71,7 @@ class CheckeredRules extends ChessRules
        getPotentialMovesFrom([x,y])
        {
                let standardMoves = super.getPotentialMovesFrom([x,y]);
+               const lastRank = this.turn == "w" ? 0 : 7;
                if (this.getPiece(x,y) == VariantRules.KING)
                        return standardMoves; //king has to be treated differently (for castles)
                let moves = [];
@@ -87,12 +87,13 @@ class CheckeredRules extends ChessRules
                        {
                                // A capture occured (m.vanish.length == 2)
                                m.appear[0].c = "c";
-                               moves.push(JSON.parse(JSON.stringify(m)));
-                               if (m.appear[0].p != m.vanish[1].p)
+                               moves.push(m);
+                               if (m.appear[0].p != m.vanish[1].p //avoid promotions:
+                                       && (m.vanish[0].p != VariantRules.PAWN || m.end.x != lastRank))
                                {
                                        // Add transformation into captured piece
                                        let m2 = JSON.parse(JSON.stringify(m));
-                                       m2.vanish[1].p = m.appear[0].p;
+                                       m2.appear[0].p = m.vanish[1].p;
                                        moves.push(m2);
                                }
                        }