X-Git-Url: https://git.auder.net/?a=blobdiff_plain;f=client%2Fsrc%2Fvariants%2FCheckered.js;h=ecf25817e7251b44c628f44729af17d2f1cb3081;hb=e78633dbd29be1920e0c02509b6ce62b87b61d77;hp=bca365d097a11a374d499244cbe5aefe0a1c3539;hpb=57d9b2c4f08948bd5a5fc4a01a0b62d4c80523e2;p=vchess.git

diff --git a/client/src/variants/Checkered.js b/client/src/variants/Checkered.js
index bca365d0..ecf25817 100644
--- a/client/src/variants/Checkered.js
+++ b/client/src/variants/Checkered.js
@@ -177,7 +177,7 @@ export class CheckeredRules extends ChessRules {
   // Does m2 un-do m1 ? (to disallow undoing checkered moves)
   oppositeMoves(m1, m2) {
     return (
-      m1 &&
+      !!m1 &&
       m2.appear[0].c == "c" &&
       m2.appear.length == 1 &&
       m2.vanish.length == 1 &&
@@ -303,7 +303,8 @@ export class CheckeredRules extends ChessRules {
   }
 
   isAttackedByBishop(sq, colors) {
-    return this.isAttackedBySlideNJump(sq, colors, V.BISHOP, V.steps[V.BISHOP]);
+    return this.isAttackedBySlideNJump(
+      sq, colors, V.BISHOP, V.steps[V.BISHOP]);
   }
 
   isAttackedByQueen(sq, colors) {
@@ -337,7 +338,7 @@ export class CheckeredRules extends ChessRules {
       "c"
     ]);
     let res = kingAttacked
-      ? [JSON.parse(JSON.stringify(this.kingPos[color]))] //need to duplicate!
+      ? [JSON.parse(JSON.stringify(this.kingPos[color]))]
       : [];
     this.turn = color;
     return res;