diff --git a/reasoning_gym/algorithmic/cryptarithm.py b/reasoning_gym/algorithmic/cryptarithm.py
index 0f2d385c..7075e9ec 100644
--- a/reasoning_gym/algorithmic/cryptarithm.py
+++ b/reasoning_gym/algorithmic/cryptarithm.py
@@ -36,9 +36,9 @@ class CryptarithmConfig:
     min_words: int = 2  # Minimum number of addends
     max_words: int = 3  # Maximum number of addends
     allow_leading_zero: bool = False
+    include_example: bool = True
     seed: Optional[int] = None
-    size: int = 20  # Number of puzzle instances to generate
-    include_example: bool = False
+    size: int = 500  # Number of puzzle instances to generate
 
     def validate(self):
         """Validate configuration parameters."""