diff --git a/CoopSweeper/GameTypes/Game.cs b/CoopSweeper/GameTypes/Game.cs
index c6259c2..7bed2ec 100644
--- a/CoopSweeper/GameTypes/Game.cs
+++ b/CoopSweeper/GameTypes/Game.cs
@@ -108,26 +108,36 @@ namespace CoopSweeper.GameTypes
             return true;
         }
 
-        
-
-        public void Reveal(int x, int y)
+        private void InternalReveal(int x, int y)
         {
-            CheckMap();
             var field = Map[x, y];
-            //if (field.CheckID < _checkID)
-            //    return;
+            if (field.CheckID == _checkID)
+                return;
+
+            field.CheckID = _checkID;
 
             if (field.State != FieldState.REVEALED)
             {
                 field.State = FieldState.REVEALED;
                 if (field.ContainsBomb)
                     GameFinished?.Invoke(false);
+                
+                if (field.SurroundingBombs == 0)
+                    foreach (var surField in GetSorroundedFields(x, y))
+                    {
+                        InternalReveal(surField.X, surField.Y);
+                    }
             }
 
             if (CheckGameFinished())
                 GameFinished?.Invoke(true);
+        }
 
-            //_checkID
+        public void Reveal(int x, int y)
+        {
+            CheckMap();
+            _checkID++;
+            InternalReveal(x, y);
         }
 
         public void ToggleMark(int x, int y)