diff --git a/src/connect4/board.rs b/src/connect4/board.rs
index a518ca6..56558a2 100644
--- a/src/connect4/board.rs
+++ b/src/connect4/board.rs
@@ -166,6 +166,7 @@ impl Game for Connect4 {
 
             if self[pos].is_some() {
                 self[pos] = None;
+                return;
             }
         }
     }