diff --git a/BlazorSolution/MiniGames/Shared/Models/TicTacToeBrett.cs b/BlazorSolution/MiniGames/Shared/Models/TicTacToeBrett.cs
index 811c25b..a340ddd 100644
--- a/BlazorSolution/MiniGames/Shared/Models/TicTacToeBrett.cs
+++ b/BlazorSolution/MiniGames/Shared/Models/TicTacToeBrett.cs
@@ -63,7 +63,18 @@ namespace MiniGames.Shared.Models
 
         public bool Voll()
         {
-            return false;
+            for (int i = 0; i < 3; i++)
+            {
+                for (int j = 0; j < 3; j++)
+                {
+                    if (Felder[i, j] == -1)
+                    {
+                        return false;
+                    }
+                }
+            }
+
+            return true;
         }
     }
 }
diff --git a/BlazorSolution/MiniGamesTests/TicTacToeBrettTest.cs b/BlazorSolution/MiniGamesTests/TicTacToeBrettTest.cs
index c688c91..ac5cf3a 100644
--- a/BlazorSolution/MiniGamesTests/TicTacToeBrettTest.cs
+++ b/BlazorSolution/MiniGamesTests/TicTacToeBrettTest.cs
@@ -149,5 +149,19 @@ namespace MiniGamesTests
             // assert
             Assert.Equal(erwartetVoll, erhaltenVoll);
         }
+
+        [Fact]
+        public void Voll_VollesBrettTest()
+        {
+            // arrange
+            TicTacToeBrett brett = TestBrett(1, 2, 3, 4, 5, 6, 7, 8, 9);
+            bool erwartetVoll = true;
+
+            // act
+            bool erhaltenVoll = brett.Voll();
+
+            // assert
+            Assert.Equal(erwartetVoll, erhaltenVoll);
+        }
     }
 }