Alekhine's gun

Alekhine's gun is a formation in chess named after the former world chess champion Alexander Alekhine. This formation was named after a game he played against Aron Nimzowitsch in Sanremo 1930, ending with Alekhine's decisive victory.

For other uses, see Alekhine's gun (disambiguation).
Alekhine vs. Nimzowitsch, 1930
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Position after 26.Qc1


Concept

The idea consists of placing the two rooks stacked one behind another and the queen at the rear. This can lead to substantial material loss for the opponent as it places considerable pressure on the "target" of the gun, especially if it is pinned (in this case it was only four moves before resignation).

Original "Alekhine's gun" game

Here is the game that spawned Alekhine's gun:

Alexander Alekhine vs. Aron Nimzowitsch, San Remo 1930:
1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. Bd2 Ne7 6. Nb5 Bxd2+ 7. Qxd2 0–0 8. c3 b6 9. f4 Ba6 10. Nf3 Qd7 11. a4 Nbc6 12. b4 cxb4 13. cxb4 Bb7 14. Nd6 f5 15. a5 Nc8 16. Nxb7 Qxb7 17. a6 Qf7 18. Bb5 N8e7 19. 0–0 h6 20. Rfc1 Rfc8 21. Rc2 Qe8? 22. Rac1 Rab8 23. Qe3 Rc7 24. Rc3 Qd7 25. R1c2 Kf8 26. Qc1 (see diagram; this is the point at which Alekhine forms the gun) Rbc8 27. Ba4 (threatening 28.b5, winning the pinned knight) b5 28. Bxb5 Ke8 29. Ba4 Kd8 (guarding c7, so that the knight can move away on 30.b5) 30. h4! (but now all Black's pieces are committed to the defence against the gun, and he is running out of moves) h5 31. Kh2 g6 32. g3 (zugzwang) 1–0[1]

Other games

Six years later, in 1936, Alekhine defeated William Winter using Alekhine's gun again.[2] Since then, players have learned much about using and guarding against this formation; however, some international games are still lost or won by the force of this tactic. In November 2018 it was successfully used by Ju Wenjun against Kateryna Lagno in game 4 of the FIDE Women's World Championship.[3] The attack could have been refuted with perfect defense, but Lagno was unable to find it and resigned five moves later. Ju Wenjun went on to win the match and with it the title.

The video game Alekhine's Gun is named after this chess formation.

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gollark: I mean, if you want the code *now* for some reason, I'll give you it?
gollark: Yes, Lua exists and I could embed it somehow, but there are !!FUN!! challenges with that:- the API is kind of unsafe so the Rust wrappers are not great- I would also have to write a bunch of glue code to allow interacting with pages and whatever, which is especially hard as my code is asynchronous- I'd *also* have to work out a nice way to integrate scripting into the interfæce still.
gollark: No, I would build some highly accursed migration tool.
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References
  1. "Alexander Alekhine vs. Aron Nimzowitsch, 1930". Chessgames.com.
  2. ."William Winter vs. Alexander Alekhine, 1936". Chessgames.com.
  3. "Kateryna Alexandrovna Lagno vs Ju Wenjun, 2018". Chessgames.com.
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