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ANNOTATED GAME

Alekhine's Gun - as posted by SonfPearl on Chess.com
Alexander Alekhine (1) vs. Aaron Nimzowitsch
Annotated by: racohen (1831)
Chess opening: French (C17), Winawer, advance, Bogolyubov variation
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1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. Bd2
To potentially free up the pinned knight?

 
5... Ne7 6. Nb5 Bxd2+ 7. Qxd2 O-O
Maybe cxd4 would be better to weaken the pawn structure

 
8. c3 b6 9. f4 Ba6 10. Nf3 Qd7 11. a4 Nbc6 12. b4
Now the c6 knight is choked

 
12... cxb4 13. cxb4 Bb7 14. Nd6 f5 15. a5 Nc8 16. Nxb7 Qxb7 17. a6 Qf7 18. Bb5 Nc8e7 19. O-O
Finally to arm the "gun"

 
19... h6 20. Rfc1 Rfc8 21. Rc2 Qe8 22. Rac1 Rab8 23. Qe3 Rc7 24. Rc2c3 Qd7 25. Rc1c2 Kf8 26. Qc1
The gun is formed. Black's knight on c6 is under tremendous pressure.

 
26... Rbc8 27. Ba4
To potentially threaten with the b-file pawn

 
27... b5 28. Bxb5 Ke8 29. Ba4 Kd8 30. h4 h5 31. Kh2 g6 32. g3
And Black resigned. There are no good moves left; he will lose material.