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+Thank you for making gobang better!
+
+Here's a checklist for things that will be checked during review or continuous integration.
+
+- \[ ] Added passing unit tests
+- \[ ] `cargo test` passes locally. It takes much time.
+- \[ ] Run `cargo fmt`
+
+Delete this line and everything above before opening your PR.
+
+---
+
+*Please write a short comment explaining your change (or "none" for internal only changes)*
+
+changelog: