[Event "Buenos"] [Site "Buenos"] [Round "3"] [White "Capablanca"] [Black "Alekhine"] [Result "1-0"] [ECO "A47"] [Opening "Neo-Queen's Indian"] 1. d4 Nf6 2. Nf3 b6 3. g3 Bb7 4. Bg2 c5 5. O-O cxd4 6. Nxd4 Bxg2 7. Kxg2 d5 8. c4 e6 9. Qa4+ Qd7 10. Nb5 Nc6 11. cxd5 (11. Bf4 e5) 11... exd5 12. Bf4 Rc8 13. Rc1 Bc5 $2 14. b4 $1 Bxb4 (14... Nxb4 15. Nd6+ Bxd6 16. Rxc8+) (14... Be7 15. Nd4) 15. Rxc6 Rxc6 16. Qxb4 Ne4 17. Nd2 Nxd2 18. Qxd2 $2 O-O {Black has a pawn as well as a Rook against two minor piece, but in practise this is seldom enough. It is certain that the minor-piece player must go for the attack, for in that way he will make most of his advantage. The Rook player will genereally welcome exchanges, since it is in an endgame that he will have drawing chances} 19. Rd1 Rc5 20. Nd4 Re8 21. Nb3 Rcc8 22. e3 (22. Qxd5 Qxd5+ 23. Rxd5 Rxe2 24. Rd2 Rxd2 25. Bxd2 Rc2 $17) 22... Qa4 23. Qxd5 {White, being committed to the attack, can allow Black two unitied passed pawns on the Queenside. From now on Black's attention will be divided between the two winge, and he will be unable to organize the defence of his King} 23... Rc2 (23... Qxa2 24. Ra1) 24. Rd2 Rxa2 {The best chance} (24... Qxa2 25. Qd7 Rf8 26. Rxc2 Qxc2 27. Nd4 Qc5 28. Nf5 -- 29. Ne7+ Kh8 30. Bd6 -- 31. Ng6+) 25. Rxa2 Qxa2 26. Qc6 Rf8 27. Nd4 Kh8 (27... Qa5 28. Bd6 Rd8 29. e4 g6 30. Be7 Rxd4 31. Qc8+ Kg7 32. Qf8#) (27... Rd8 28. e4 h6 29. Be5 f6 30. Ne6 $18) (27... h6 28. Bd6 Rd8 29. e4 Qd2 30. Nf5 g6 31. Bf4 Qd7 32. Qf6 gxf5 33. Bxh6 Qd4 34. e5 Qe4+ 35. f3 Qe2+ 36. Kh3 Qf1+ 37. Kh4 Rd4+ 38. Kg5) 28. Be5 f6 { This weakening should be avoided if possible} (28... Rg8 29. Bxg7+ (29. e4 f6 ( 29... Qb2 30. Nf3 Qb3 31. Ng5 f6 32. Qb5 Qa2 33. Qa4 $18) (29... Qa5 30. Nf3 f6 (30... Qc5 31. Ng5 Qe7 32. Qh6 $1) 31. Bd4 Rf8 (31... h6 32. e5 fxe5 33. Bxe5 Kh7 34. Qc2+ Kh8 35. Qg6) 32. Qd6 Kg8 33. Qe6+ Kh8 34. e5 fxe5 35. Nxe5 $18) 30. Bxf6 gxf6 31. Qxf6+ Rg7 32. Ne6 $18) 29... Rxg7 30. Qe8+ Rg8 31. Qe5+ Rg7 32. Nf5 f6 33. Qxf6 Qd5+ 34. Kh3 Qd7 $11 35. Qf8+) 29. Ne6 Rg8 30. Bd4 h6 ( 30... a5 31. Nxg7 Rxg7 32. Qxf6 Qg8 33. h4) 31. h4 Qb1 32. Nxg7 {The decisive combination. White has carried out his plan with great singleness of purpose} 32... Qg6 (32... Kxg7 33. Qxf6+ Kh7 34. Qf7+) (32... Rxg7 33. Qxf6 Qe4+ 34. Kg1 (34. Kh2 {Further away from the a-pawns}) 34... Qb7 (34... Qb1+ 35. Kh2 Qh7 36. Qf8+) 35. Qxh6+ Kg8 36. Qxg7+ Qxg7 37. Bxg7 Kxg7 $18) 33. h5 Qf7 34. Nf5 Kh7 35. Qe4 Re8 36. Qf4 Qf8 37. Nd6 Re7 38. Bxf6 Qa8+ 39. e4 Rg7 40. Bxg7 Kxg7 41. Nf5+ Kf7 42. Qc7+ {mate in two} 1-0