X-Git-Url: https://git.auder.net/?a=blobdiff_plain;f=client%2Fsrc%2Fbase_rules.js;h=e142839997a1572b5ec441126cb3d71ef0ab8989;hb=57d9b2c4f08948bd5a5fc4a01a0b62d4c80523e2;hp=6da3212f51b52b5787bcfd1825d65634fcda52db;hpb=2f9fcef3eb606c6389249c35393265de7d8f392f;p=vchess.git

diff --git a/client/src/base_rules.js b/client/src/base_rules.js
index 6da3212f..e1428399 100644
--- a/client/src/base_rules.js
+++ b/client/src/base_rules.js
@@ -226,7 +226,7 @@ export const ChessRules = class ChessRules {
     if (
       Math.abs(s.x - e.x) == 2 &&
       s.y == e.y &&
-      move.appear[0].p == V.PAWN
+      (move.appear.length > 0 && move.appear[0].p == V.PAWN)
     ) {
       return {
         x: (s.x + e.x) / 2,