Almost fixed bario

[xogo.git] / variants / Antiking1 / class.js

diff --git a/variants/Antiking1/class.js b/variants/Antiking1/class.js
index 323b826..4ef66f2 100644 (file)
--- a/variants/Antiking1/class.js
+++ b/variants/Antiking1/class.js
@@ -48,7 +48,7 @@ export default class Antiking1Rules extends AbstractAntikingRules {
 
   getFlagsFen() {
     return (
-      Array.prototype.concat.apply(
+      Array.prototype.concat.apply([],
         ['w', 'b'].map(c => {
           const res = Object.keys(this.kingFlags[c]).join("");
           return (c == 'w' ? res.toUpperCase() : res);