D05: Colle System with ...e6

1. d4 d5 2. Nf3 e6 3. e3 Nf6 4. Bd3 c5 5. c3 5. O-O Nc6= 5... Nc6 6. Bb5 6. Nbd2 Bd6= 6... a6 Black threatens to win material: a6xb5 7. Qa4 7. Bxc6+!? is worth looking at 7... bxc6 8. Nbd2=/+ 7... Bd7-/+ Not 7... axb5 8. Qxa8 Be7 9. dxc5 Bxc5 10. b4+/- 8. Bxc6 Bxc6 9. Qc2 Bb5 9... b6 10. Ne5 Qc7 11. O-O-/+ 10. Na3 10. a4 Bc6=/+ 10... Bc6 10... Bd7 11. O-O=/+ 11. Ne5 >= 11. Nb1!?= should be investigated more closely 11... Rc8 12. Nxc6 Rxc6 13. Bd2 13. Nb1!?-/+ 13... cxd4-+ 14. Qa4 >= 14. exd4 Bxa3 15. bxa3-+ 14... dxc3 15. Bxc3 Be7 15... Ne4 and Black can already relax 16. Nb1 Bd6 17. O-O-+ 16. Rc1 16. O-O O-O-+ 16... O-O 16... b5 17. Qd1 Rxc3 18. Rxc3-+ 17. O-O Qc8 18. Nc2 18. Rc2 Qd7-+ 18... Ne4 19. Bb4?? the position was bad, and this mistake simply hastens the end 19. Nd4 Rc4 20. Qb3-+ 19... Bxb4 19... >= b5!? seems even better 20. Qb3 Bxb4 21. Qxb4 Rxc2 22. Rxc2 Qxc2 23. h3-+ 20. Qxb4 Qc7 20... >= Rxc2 and Black has prevailed 21. Rxc2 Qxc2 22. Qxb7 a5-+ 21. f3 Nd6 22. Qd2 22. Rf2-+ 22... Rc8 23. Rf2 Nc4 23... >= Qb6 keeps an even firmer grip 24. b3 Rc3 25. g4-+ 24. Qd4 e5 25. Qxd5 25. Qc3 a5-+ 25... Qb6 25... Nxe3 makes it even easier for Black 26. Nxe3 Rxc1+ 27. Rf1-+ 26. Qe4?? an oversight. But White was lost anyway. 26. Re1 Nxb2 27. Ree2 Rd8-+ 26... Qxb2 26... >= Nxe3 and Black takes home the point 27. Qxe5 Nxc2-+ 27. Rd1 27. Rcf1 R6c7-+ (27... <= Qxa2 28. Nb4 Qa4 29. Nxc6 Qxc6 30. Ra2-/+) 27... Nd6 27... Qxa2 28. f4 Qa5 29. Rd7-+ 28. Qd3 >= 28. Qg4 f5 29. Qb4 Qxb4 30. Nxb4-/+ 28... g6?? hands over the advantage to the opponent 28... Rxc2 29. Qxd6 g6 30. Rfd2 Qxa2 31. Rxc2 Qxc2 32. h3-+ 29. Ne1?? not a good decision, because now the opponent is right back in the game >= 29. Nd4 Qb6 30. Nxc6 Rxc6 31. Qb3+/- 29... Qb5 29... Qb6 30. Rb1 Qd8 31. Rd1-+ 30. Rc2 30. e4 Nc4-/+ 30... Qxd3-+ 31. Rxd3 Nc4 32. Re2 Kf8 33. Rd7 R8c7 34. Rxc7 Rxc7 35. f4 35. e4 b5-+ 35... f6 35... e4 36. g4-+ 36. fxe5 Nxe5 and after a few more moves White lost on time 36... Nxe5 37. Rc2 Rd7-+ 0-1 [Fritz 9 (5s)]