[Event "Leningrad"] [Site "?"] [Round "0"] [White "Euwe"] [Black "Kan"] [Result "1-0"] [ECO "E20"] [Opening "Nimzo-Indian Defence"] 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 {The Saemish variation of the Nimzoindian defense. The early resolution of the tension at c3 rarely works in White's favor.} 4... Bxc3+ 5. bxc3 d5 6. f3 b6 { 6...dxc4 7.e4 White has the advantage due to his powerful center.} 7. Bg5 { White pins the knight on f6.} 7... Bb7 8. e3 Nbd7 9. Bd3 h6 10. Bh4 c5 11. Ne2 Rc8 {11...Qc7 breaking the pin should of been preferred.} 12. cxd5 exd5 13. O-O {White stands better because of his bishop pair and control of the center. Notice how White's center pawns control the Black knights.} 13... O-O 14. Bf5 { White pins the Black knight on d7.} 14... Bc6 15. e4 { The pins make this central break possible.} 15... g5 {White's pins have forced Black to fatally weaken his kingside. 15...dxe4 16.fxe4 g5 17.d5 gxh4 18.dxc6 Rxc6 19.Qe1 would take advantage of Black's weakened kingside.} 16. exd5 Nxd5 17. Bf2 c4 {17...Bb5 18.dxc5 Bxe2 19.Qxe2 would favor White because of his two bishops and Black's weakened kingside.} 18. Qd2 Qf6 19. Ng3 Rce8 20. Rae1 Rxe1 {20...Nf4 21.d5 Ba4 22.Bd4 Qd6 23.Ne4 Qxd5 would allow White a winning combination.} 21. Rxe1 b5 22. Bb1 N7b6 23. Nh5 Qd6 24. Re5 f5 { 24...Qxa3 allows White a mating attack.} 25. Bxf5 Qxa3 26. Be1 Nf6 27. Be6+ Kh8 28. Nxf6 Rxf6 29. d5 {White has a winning position because of his passed d-pawn and Black's weakened kingside.} 29... Bd7 30. h4 { White makes luft for his king while further attacking the Black kingside.} 30... Qd6 31. Qd4 Rf4 32. Qe3 Bxe6 33. dxe6 Rf8 34. e7 Re8 35. Re6 { Black resigned.} 1-0