X-Git-Url: https://git.auder.net/?a=blobdiff_plain;f=client%2Fsrc%2Fvariants%2FAtomic1.js;h=a5198d6951b97bed322e19ee45e43243b75d582f;hb=ded43c88fad60fd8f9bb46aabd67f3f2092f65f3;hp=27769a7e372aa4a44acbb004373f6efce5a5ee62;hpb=0fb43db7c2858201e8410670b90f95ad8b138964;p=vchess.git

diff --git a/client/src/variants/Atomic1.js b/client/src/variants/Atomic1.js
index 27769a7e..a5198d69 100644
--- a/client/src/variants/Atomic1.js
+++ b/client/src/variants/Atomic1.js
@@ -5,6 +5,17 @@ export class Atomic1Rules extends ChessRules {
   getPotentialMovesFrom([x, y]) {
     let moves = super.getPotentialMovesFrom([x, y]);
 
+    if (this.getPiece(x, y) == V.PAWN) {
+      // Promotions by captures can be reduced to only one deterministic
+      // move (because of the explosion).
+      moves = moves.filter(m => {
+        return (
+          m.vanish.length == 1 ||
+          [V.PAWN, V.QUEEN].includes(m.appear[0].p)
+        );
+      });
+    }
+
     // Handle explosions
     moves.forEach(m => {
       // NOTE: if vanish.length==2 and appear.length==2, this is castle
@@ -91,7 +102,8 @@ export class Atomic1Rules extends ChessRules {
         ) {
           this.kingPos[c] = [-1, -1];
           this.castleFlags[c] = [8, 8];
-        } else {
+        }
+        else {
           // Now check if init rook(s) exploded
           if (Math.abs(move.end.x - firstRank[c]) <= 1) {
             if (Math.abs(move.end.y - this.castleFlags[c][0]) <= 1)