Did bug work-around

src/player/malte/MalteAI.java

@@ -68,6 +68,7 @@ public class MalteAI implements Player{
             return i.intValue();
         }
         // Get options which would prevent an instant win of the enemy.
+        enemyID = enemyID == 0 ? 1: enemyID;
         Set<Integer> preventionsOptions = getRowCompletionOptions(options, board, enemyID);
         for (Integer i: preventionsOptions) {
             // Only accept options, that would not cause a winning opportunity for the enemy.