Achim Mueller (1927) - Bjoern Klein (2115) [D10]

Muensterland Open 2009


1. d4 c6 2. c4 d5 3. Nc3 Nf6 4. e3 Bf5?! From former preparation I knew that this move is doubtful but couldn't remember the whole line. It took me quite some time now to find the best continuation. 5. cxd5 cxd5 6. Qb3 Qd7 7. Nf3 5 7... e6 8. Bb5 8. Ne5 Qc7 9. Bd2 Nc6 10. Rc1 Nd7 8... Nc6 9. Ne5 Qc7 10. Qa4 1:30 10... Nd7 1:46 10... Rc8 11. Qxa7 Bd6 12. Bxc6+ bxc6 13. Qxc7 Rxc7+/- 11. Nxc6 bxc6 12. Bxc6+/- Rb8 13. O-O?! Here I probably missed the best line. Although I saw the upcoming endgame with Black having the bishop pair and some pressure on White's queenside pawns I overestimated being a pawn up. 13. Bb5! keeping the pressure on d7 is much better. 13... Bd6 14. Bd2 Rb6 15. Rc1 Qb7 16. O-O+/- 13... Rb4 14. Bxd7+ Qxd7 15. Qxd7+ Kxd7 16. b3 Rb6 17. Na4 Rc6 18. Bb2 Bd6 19. Rac1 10 19... Rhc8 20. Rxc6 1:09 My opponent suggested 20. Nc5+ Bxc5 21. dxc5 Rxc5 22. Rxc5 Rxc5 23. Bxg7 Rc2~~ 20... Rxc6 1:35 21. Rc1 Rxc1+ 22. Bxc1 Kc6 23. f4 20 23... Bb1 24. Nc3 24. a3? Bc2=/+ 24... Bd3 25. Kf2 Bb4 26. Ne2 Kb5 27. a3 Ba5 28. a4+ Kc6 29. Ba3 Bc2 29... Bd2 30. Ng1+/= 30. b4 0:34 30... Bc7 1:23 My opponent played awfully fast 31. Nc3 a6 32. b5+ 10 I was afraid of a setup like Kb7, Bd6, a5 32... axb5 33. axb5+ Kb7 34. Bb4 Bd3 So far so good. White is still a pawn up but needs to provoce a weakness on Black's kingswing to make progesses. Obviously I didn't find the right plan. 35. Bf8 g6 36. Bb4 Bc4 36... Kb6 37. Bc5+ Ka5 38. b6 Bxb6 39. Bxb6+ Kxb6= 37. Kf3 Bb6 38. h3 h5 39. g4 hxg4+ 40. Kxg4? 0:09 40... Bd8 1:13 41. h4 Bd3! 42. Kg3 20 I missed 42. h5? Bf5+ 43. Kf3 gxh5 in my calculation before. 42... Bc4 43. e4 10 43. Kg4 Bd3 44. Kg3 Bc4= 43... Bb6 44. exd5 exd5 45. Bc5 Ba5 46. Nd1 Bxb5 47. Ne3 Kc6 48. f5 Be1+ 49. Kg4 Be2+ 50. Kh3 0:12 - 2:00 50. Kh3 Bd2 51. fxg6 fxg6 (51... Bxe3 52. g7+-) 52. Ng4= 1/2-1/2 [Achim Mueller]

 

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