diff --git a/Models/Grid.cs b/Models/Grid.cs
index d48f5f0..d4adda9 100644
--- a/Models/Grid.cs
+++ b/Models/Grid.cs
@@ -20,9 +20,9 @@ public class Grid {
         if (point.X < MinGrid.X || point.Y < MinGrid.Y)
             return false;
         
-        else if ((point.X + tetrominoe.Shape.GetLength(0)) > MaxGrid.X || (point.Y  + tetrominoe.Shape.GetLength(1)) > MaxGrid.Y)
+        else if ((point.X + tetrominoe.Shape.GetLength(0)-1) > MaxGrid.X || (point.Y  + tetrominoe.Shape.GetLength(1)-1) > MaxGrid.Y)
             return false;
-        
+
         for (uint x = 0; x < shape.GetLength(0); x++)
             for (uint y = 0; y < shape.GetLength(1); y++) {
                 Point s = point + new Size((int) x, (int) y);