---
layout: post
title: "En passant bug in Clubhouse Games: 51 Worldwide Classics"
date: 2020-09-21 00:00:00 +0100
---
In a [live stream by Oga Namome][stream] it has been discovered that in
the chess game in Nintendo's *Clubhouse Games: 51 Worldwide Classics*,
a bug exists where if a player is:

 - in check, and
 - the only legal move is to take a pawn en passant,

then the game will incorrectly announce checkmate.

Below is a clip of that moment:

<video controls><source src="/blog/images/2020-09-21-clubhouse-games-en-passant-bug.0.mp4" type="video/mp4 /"></video>
[(Signature)][sig0]

Transcript of the game:

1\. e4 e5 2. c3 Qf6 3. Nf3 c5 4. Bc4 Qg6 5. O-O Qxe4 6. Nxe5 Qxe5 7. Re1 Nc6 8. Rxe5+ Nxe5 9. Qe2 Bd6 10. d4 cxd4 11. cxd4 Ne7 12. dxe5 Bc5 13. Nc3 Bb4 14. Qf3 f5 15. exf6 Bxc3 16. f7+ Kf8 17. Qxc3 d5 18. Bh6 Nf5 19. Bxd5 Be6 20. Qc5+ Kxf7 21. Qc7+ Kg6 22. Bxe6 Nxh6 23. Qxb7 Rab8 24. Qe4+ Kf6 25. Bh3 Rbf8 26. Re1 g5 27. Qe6+ Kg7 28. Qe5+ Kf7 29. Qxg5 Ng8 30. f4 a5 31. Qd5+ Kg7 32. f5 h5 33. Re3 Rh6 34. Rg3+ Kh7 35. Qc5 Ra8 36. Qd5 Rf8 37. Qxa5 h4 38. Rf3 Rc6 39. Qa7+ Kh6 40. Kf2 Rc2+ 41. Ke1 Rxb2 42. Qe3+ Kh5 43. g4+

Lichess study with some annotations: <https://lichess.org/study/eR7oCNAX>

[stream]: https://www.youtube.com/watch?v=8gTbNxhXDY4
[sig0]: /blog/sig/2020-09-21-clubhouse-games-en-passant-bug.0.mp4.sig