diff --git a/reasoning_gym/algorithmic/jugs.py b/reasoning_gym/algorithmic/jugs.py
index 3f93a409..a09893d0 100644
--- a/reasoning_gym/algorithmic/jugs.py
+++ b/reasoning_gym/algorithmic/jugs.py
@@ -279,8 +279,8 @@ Reply as a JSON-parsable list of moves which result in any of the jugs being fil
 
         return {
             "question": question,
-            "answer": None,
-            "metadata": {"possible_answer": solution, "puzzle": puzzle},
+            "answer": json.dumps(solution),  # one possible solution
+            "metadata": {"puzzle": puzzle},
         }
 
     def score_answer(self, answer: Optional[str], entry: Dict[str, any]) -> float: