diff --git a/game/src/lib.rs b/game/src/lib.rs
index 728352e..ac33b14 100644
--- a/game/src/lib.rs
+++ b/game/src/lib.rs
@@ -56,7 +56,7 @@ impl Game {
     {
         self.init();
         for play in history {
-            self.process(play).ok();
+            if self.process(play).is_err() { break }
         }
         Ok(())
     }