[Event "Candidates 2009"] [Site "Memphis,TN"] [Date "2009.01.04"] [Round "4"] [White "Chowdhury, Rafi"] [Black "Hortillosa, Andres"] [Result "0-1"] [ECO "E21"] [WhiteElo "1623"] [BlackElo "1930"] [Annotator "Fritz 11 (57s)"] [PlyCount "76"] [EventDate "2009.??.??"] {E21: Nimzo-Indian: 4 Nf3} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 b6 5. Bg5 Bxc3+ 6. bxc3 Bb7 {last book move} 7. d5 {White gets more space} (7. e3 $5 $14 { must be considered}) 7... d6 {Consolidates e5} 8. e3 e5 (8... Nbd7 9. Nd4 h6 10. Bh4 exd5 11. cxd5 Bxd5 12. f3 $15) 9. Qc2 Nbd7 10. e4 h6 {Black threatens to win material: h6xg5} 11. Be3 Qe7 12. h3 {Covers g4} a5 13. Be2 O-O 14. Nh4 Rfd8 15. Nf5 {White threatens to win material: Nf5xe7} Qf8 16. g4 Nc5 {Black threatens to win material: Nc5xe4. The knight likes it on c5} 17. Bf3 Nh7 ( 17... Bc8 18. h4 Bxf5 19. exf5 $14) 18. h4 $16 Bc8 (18... f6 $16) 19. Ke2 { White loses the right to castle} (19. g5 $142 $5 $16) 19... Ba6 {Black pins: Ba6xc4} 20. Rag1 Bxc4+ 21. Kd2 (21. Ke1 $5 $11 {is an interesting alternative}) 21... Bd3 $15 {Black threatens to win material: Bd3xc2} 22. Qd1 Bxe4 23. Bxc5 ( 23. Bxe4 $142 $5 {and White is still in the game} Nxe4+ 24. Kc2 $15) 23... Bxf3 $19 24. Qxf3 bxc5 (24... dxc5 $142 $5 25. c4 g6 $19) 25. g5 $15 {White gains space} Rab8 26. gxh6 g6 27. h5 g5 28. Kc2 (28. Rb1 Qe8 29. Ng3 Qd7 $15) 28... Qe8 $17 29. Rg4 f6 (29... a4 30. Ne3 a3 31. Kc1 $17) 30. Ng7 (30. Qd3 Kh8 $15) 30... Qf7 (30... Qb5 31. Nf5 Re8 32. Rc1 Qb2+ 33. Kd1 Qxa2 34. Ne3 $19) 31. Ra4 {White threatens to win material: Ra4xa5} (31. Ne6 Rd7 32. Rb1 Rxb1 33. Kxb1 Re7 $11) 31... Rb5 (31... Qd7 $142 32. Rg4 Rb6 $15) 32. Qe4 $4 (32. Rb1 $142 { the rescuing straw} Rxb1 33. Kxb1 $15) 32... Rdb8 $19 33. c4 Rb2+ 34. Kc3 Rxf2 35. Rxa5 $4 {simply worsens the situation} (35. Rb1 Rxb1 36. Qxb1 $19) 35... f5 36. Qe1 (36. Nxf5 Nf6 37. Qd3 e4 $19) 36... Rf3+ (36... e4 37. Rb5 Qf6+ 38. Kb3 Qb2+ 39. Ka4 Qxa2#) 37. Kc2 $19 e4 (37... c6 $142 {makes it even easier for Black} 38. Rf1 Qb7 39. Qb1 (39. Rxf3 {is not directly advisable since it leads to the following attractive mate} Qb2+ 40. Kd1 Qb1+ 41. Ke2 Qe4+ 42. Kf1 Qxf3+ 43. Kg1 Rb2 44. Ra8+ Nf8 45. h7+ Kxh7 46. Qf1 Qg3+ 47. Qg2 Qxg2#) 39... Rf2+ 40. Kc3 Qxb1 41. Rxb1 Rxb1 42. Ra8+ Nf8 43. Ne6 $19) 38. Ra7 (38. Ne6 c6 $1 { Deflection: c6} 39. Qa1 cxd5 40. cxd5 $19) 38... Qf6 (38... Qf6 39. Rb7 Rxb7 40. Rf1 Qb2+ 41. Kd1 Rd3+ 42. Qd2 Qxd2#) 0-1