X-Git-Url: https://git.auder.net/?a=blobdiff_plain;f=client%2Fsrc%2Fvariants%2FMonochrome.js;h=954a050f34f9e82cb34394478bc91b4b2d5d237e;hb=715c0ae4af465988f4e50e8c8ac3192399639f06;hp=ba56c69a9a2dca61b103ef523d45a527546ab7f8;hpb=8ca6042e7b8cffd4131e81493141ab6261300ff6;p=vchess.git

diff --git a/client/src/variants/Monochrome.js b/client/src/variants/Monochrome.js
index ba56c69a..954a050f 100644
--- a/client/src/variants/Monochrome.js
+++ b/client/src/variants/Monochrome.js
@@ -105,7 +105,21 @@ export class MonochromeRules extends ChessRules {
   }
 
   getPotentialMovesFrom(sq) {
-    return super.getPotentialMovesFrom(sq).concat(this.findCaptures(sq));
+    const moves = super.getPotentialMovesFrom(sq);
+    const zenCaptures = this.findCaptures(sq);
+    // Remove duplicate captures in a lazy way (TODO: more efficient...)
+    let hashMoves = {};
+    moves.forEach(m => {
+      if (m.vanish.length == 2) {
+        const hash =
+          m.start.x + "." + m.start.y + "." + m.end.x + "." + m.end.y;
+        hashMoves[hash] = true;
+      }
+    });
+    return moves.concat(zenCaptures.filter(m => {
+      const hash = m.start.x + "." + m.start.y + "." + m.end.x + "." + m.end.y;
+      return !hashMoves[hash];
+    }));
   }
 
   getAllPotentialMoves() {