playable2

src/GomokuCell.java

@@ -34,10 +34,7 @@ public class GomokuCell{
     }
 
     public boolean isPlayable(){
-        for (GomokuCell var : this.neighbour.values()) {
-            if (var.isPlayed()) return true;
-        }
-        return false;
+        return this.neighbour.size() > 0;
     }
 
 }