[Event "Candidates 2009"] [Site "Memphis,TN"] [Date "2009.01.03"] [Round "1"] [White "Chowdhury, Rafi"] [Black "Davison, Edgar"] [Result "0-1"] [ECO "C01"] [WhiteElo "1623"] [BlackElo "1851"] [Annotator "Fritz 9 (30s)"] [PlyCount "84"] [EventDate "2009.??.??"] {C01: French: Exchange Variation} 1. e4 d5 2. exd5 Nf6 3. c4 e6 4. Nc3 exd5 5. d4 Be7 6. Nf3 O-O 7. Be2 c6 8. h3 dxc4 9. Bxc4 {last book move} Nbd7 {The idea is Nb8-d7-b6-d5} 10. a4 {Black has a cramped position. Black's piece can't move: c8} Nb6 {Black threatens to win material: Nb6xc4} 11. Bb3 Nbd5 {The knight likes it on d5} 12. O-O {White has an active position} Bf5 13. Nh4 { White threatens to win material: Nh4xf5} (13. Re1 Bd6 $11) 13... Be6 $15 14. Nf3 Qb6 15. Ba2 (15. a5 Qb4 16. Nxd5 Nxd5 $15) 15... Rfd8 (15... Rae8 16. Re1 $17) 16. Re1 $15 h6 {Consolidates g5} 17. Re2 (17. a5 Qc7 $11) 17... Qc7 (17... Re8 18. Nxd5 Nxd5 19. Bd2 $15) 18. Ne5 (18. Bd2 Rac8 $11) 18... Bd6 $15 19. Bd2 Re8 20. Qe1 Rad8 21. Bxd5 (21. Nxd5 Nxd5 22. Ba5 b6 $15) 21... Nxd5 $17 ({ Weaker is} 21... cxd5 22. Nb5 Qe7 23. Ba5 $14) ({Not} 21... Bxd5 22. Ng4 Be6 23. Nxf6+ gxf6 24. Ne4 $16) 22. Nxd5 Bxd5 (22... cxd5 $6 23. Ba5 b6 24. Rc1 $11 ) 23. Rc1 Re6 24. Nc4 (24. f4 Rde8 25. Be3 R6e7 $17) 24... Rde8 (24... Rg6 $5 25. g4 f5 26. Nxd6 Qxd6 27. g5 $19) 25. Rxe6 Rxe6 (25... Bxe6 $6 26. Nxd6 Qxd6 27. Qe5 $11) 26. Qf1 Qe7 27. Nxd6 Qxd6 ({Worse is} 27... Rxd6 28. Bb4 $16) 28. Re1 Rg6 29. Re8+ (29. f3 Be6 30. Kh1 Qxd4 $19) 29... Kh7 $19 30. f3 Be6 31. g4 (31. Kh1 Qxd4 32. Bc3 Qxa4 $19) 31... Qxd4+ 32. Qf2 Qxa4 33. Bc3 Qd1+ 34. Kg2 Bd5 35. Re1 Qa4 36. h4 $4 {leading to a quick end} (36. Kh2 $19) 36... Rxg4+ ( 36... Qxg4+ $142 $1 {ends the debate} 37. Kf1 Qh3+ 38. Ke2 Rg2 39. Qxg2 Qxg2+ 40. Kd3 Qxf3+ 41. Re3 Qd1+ 42. Bd2 c5 $19) 37. Kh3 Rg6 (37... Qf4 $142 { might be the shorter path} 38. Bd2 Rxh4+ 39. Qxh4 Qxd2 40. Rf1 Qxb2 41. Qe1 $19 ) 38. Re8 (38. Rg1 {there is nothing else anyway} Be6+ 39. Kh2 Qf4+ 40. Kh1 $19 ) 38... Qf4 39. h5 (39. Be5 {there is nothing better in the position} Qc1 40. Kh2 Bxf3 41. Qxf3 Qd2+ 42. Kh3 Qd7+ 43. Kh2 Qxe8 44. Bg3 $19) 39... Qf5+ 40. Kh4 Qg5+ 41. Kh3 Qxh5+ 42. Qh4 Qxf3+ (42... Qxf3+ 43. Kh2 Qg2#) 0-1