diff --git a/GameMap.py b/GameMap.py
index 0d02c41..b325ab1 100644
--- a/GameMap.py
+++ b/GameMap.py
@@ -3,10 +3,10 @@ class GameMap:
     def __init__(self, max_size_x = float('inf'), max_size_y = float('inf')):
         self.max_size_x = max_size_x
         self.max_size_y = max_size_y
-        data = {}
+        self.data = {}
     
     def __str__(self):
-        return data
+        return str(self.data)
     
     
     def get_max_size_x(self):
@@ -18,12 +18,15 @@ class GameMap:
     
     
     def add_player_mark(self, x, y, player):
-        if x <= max_size_x or y <= max_size_y:
+        if x <= self.max_size_x and y <= self.max_size_y:
             self.data[(x,y)] = player
+            player.record_mark(x, y)
         else:
-            raise IndexError("Mark added beyond preset max values (max_x - " + self.max_size_x + ", max_y - " + self.max_size_y + ".")
+            errorMessage = "The mark" + str((x,y)) + " is beyond preset max values, max_x - " + str(self.max_size_x) + ", max_y - " + str(self.max_size_y)
+            raise IndexError(errorMessage)
     
         
     def clear_map(self):
         self.data = {}
+        
         
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