* Fixed a problem with player leaving the game during multiplayer game.

Mage/src/main/java/mage/game/GameImpl.java

@@ -573,6 +573,7 @@ public abstract class GameImpl implements Game, Serializable {
                 }
             } else {
                 // no asynchronous action so check directly
+                concedingPlayers.add(playerId);
                 checkConcede();
             }
         } else {