diff --git a/reasoning_gym/cognition/rubiks_cube.py b/reasoning_gym/cognition/rubiks_cube.py
index f39d6176..17f45315 100644
--- a/reasoning_gym/cognition/rubiks_cube.py
+++ b/reasoning_gym/cognition/rubiks_cube.py
@@ -116,7 +116,8 @@ class RubiksCubeDataset(ProceduralDataset):
 
             # Test the solution
             try:
-                eval_cube.rotate(answer)
+                expanded_answer = self.expand_moves(answer)
+                eval_cube.rotate(expanded_answer)
                 solved = eval_cube.is_done()
 
                 if solved:
@@ -135,6 +136,22 @@ class RubiksCubeDataset(ProceduralDataset):
         ansi_escape = re.compile(r"(?:\x1B[@-_]|[\x80-\x9F])[0-?]*[ -/]*[@-~]")
         return ansi_escape.sub("", line)
 
+    def expand_moves(self, move_str):
+        moves = move_str.split()
+        expanded = []
+        for move in moves:
+            # Split the move into the base part and any trailing digits
+            match = re.fullmatch(r"^([^\d]*)(\d*)$", move)
+            if match:
+                base, num_part = match.groups()
+                if num_part:
+                    # Append two copies of the base if there was a number. I don't think F3 is a valid signmaster notation etc
+                    expanded.append(base)
+                    expanded.append(base)
+                else:
+                    expanded.append(base)
+        return " ".join(expanded).strip()
+
 
 # Register the dataset
 register_dataset("rubiks_cube", RubiksCubeDataset, RubiksCubeConfig)