diff --git a/src/ch/zhaw/catan/Player.java b/src/ch/zhaw/catan/Player.java
index ed2ac1f..c535b68 100644
--- a/src/ch/zhaw/catan/Player.java
+++ b/src/ch/zhaw/catan/Player.java
@@ -95,10 +95,17 @@ public class Player {
 
 
    //returns true if player has enough resources else false
-    private boolean checkRessourceToBuild(List<Config.Resource> liste) {
-        for (Config.Resource resource : liste) {
-            int possesion = resources.get(resource);
-            if (possesion == 0) {
+    private boolean checkResourceToBuild(List<Config.Resource> list) {
+        HashMap<Config.Resource, Integer> costs = new HashMap<>();
+        for(Config.Resource resource : list){
+            if(costs.containsKey(resource)){
+                costs.put(resource, costs.get(resource) + 1);
+            } else {
+                costs.put(resource, 1);
+            }
+        }
+        for (Config.Resource resource : costs.keySet()) {
+            if (resources.get(resource) < costs.get(resource)) {
                 return false;
             }
         }
@@ -106,5 +113,4 @@ public class Player {
     }
 
 
-
 }
diff --git a/src/ch/zhaw/catan/SiedlerGame.java b/src/ch/zhaw/catan/SiedlerGame.java
index 0241ed0..ec52e4b 100644
--- a/src/ch/zhaw/catan/SiedlerGame.java
+++ b/src/ch/zhaw/catan/SiedlerGame.java
@@ -479,11 +479,11 @@ public class SiedlerGame {
      */
     public boolean tradeWithBankFourToOne(Resource offer, Resource want) {
         Player player = allPlayers.get(activePlayer);
-         if(player.getSpecificResource(offer) >= FOUR_TO_ONE_TRADE_OFFER && addResourcesToPlayer(player, want, FOUR_TO_ONE_TRADE_WANT)){
-             substractResourceFromPlayer(player, offer, FOUR_TO_ONE_TRADE_OFFER);
-             return true;
-         }
-         return false;
+        if(player.getSpecificResource(offer) >= FOUR_TO_ONE_TRADE_OFFER && addResourcesToPlayer(player, want, FOUR_TO_ONE_TRADE_WANT)){
+            substractResourceFromPlayer(player, offer, FOUR_TO_ONE_TRADE_OFFER);
+            return true;
+        }
+        return false;
     }
 
     /**