E21: Nimzo-Indian: 4 Nf3

1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Nc3 Bxc3+ 4... c5 5. e3= 5. bxc3+/= d5 6. cxd5 exd5 7. Ba3 White traps the enemy king in the center 7... Nbd7 8. g3 8. e3!?+/- 8... b6 Prevents intrusion on c5 9. Qd3 Bb7 9... c5 10. Qe3+ Qe7 11. Qxe7+ Kxe7 12. Nd2+/= 10. Bg2 10. Bh3 c5 11. dxc5 bxc5 12. Bxc5 Nxc5 13. Qb5+ Nfd7 14. Bxd7+ Nxd7 15. Qxb7 Nb6+/= 10... Rb8 10... c5!?= should be investigated more closely 11. Qe3++/- Ne4 12. Nd2 Qg5 13. f4 Worse is 13. Bxe4 Qxe3 14. fxe3 dxe4=/+ 13... Qg6 14. c4 c5?? another step towards the grave >= 14... f5 15. Rc1 Ndf6+/- 15. cxd5+- Bxd5 15... f5 doesn't improve anything 16. Nxe4 (16. Bxe4?! fxe4 17. dxc5 Bxd5+/-) 16... fxe4 17. dxc5 bxc5 18. Bxe4+- 16. Nxe4 >= 16. Bxe4!? might be the shorter path 16... Qe6 17. Qf3 Bxe4 18. Qxe4 O-O 19. Qxe6 fxe6+- 16... O-O 16... Kd8 17. f5 Qc6 18. O-O+- 17. O-O Rfe8 18. f5 Qc6 19. Rf4 Re7 19... Nf6 20. Nxf6+ Qxf6 21. Qd3 Bxg2 22. Kxg2 cxd4 23. Bb2+- 20. dxc5 Nxc5 20... Nf6 does not solve anything 21. Nxf6+ Qxf6 22. Qd4 Qxd4+ 23. Rxd4 Bxg2 24. Kxg2 Rxe2+ 25. Kh3 bxc5 26. Bxc5+- 21. Rc1 21. Bxc5 and White can already relax 21... Qxc5 Eliminates the defender c5 22. Nxc5 Rxe3+- 21... Rxe4 22. Bxe4 Re8 22... Bxe4 praying for a miracle 23. Qd4 Bh1+- 23. Bxd5 >= 23. Bxc5 nails it down 23... bxc5 24. Bxd5 Rxe3 25. Bxc6 Rxe2 26. Re4 Rxe4 27. Bxe4+- 23... Rxe3 24. Bxc6 Rxa3 25. f6 25. Rd4 makes it even easier for White 25... Kf8 26. e4 Ke7+- 25... Rxa2 25... gxf6 cannot change destiny 26. Bd5 Kg7 27. e4+- 26. Rd1 26. Rg4 Rd2 27. Rxg7+ Kh8 28. Rxf7+- 26... gxf6 26... Ne6 is no salvation 27. Bd5 Nxf4 28. Bxa2+- 27. h4 27. Rd8+ Kg7 28. Rg4+ Kh6 29. Rdg8 Ra1+ 30. Kg2 Rg1+ 31. Kxg1 a6 32. Rh4# 27... Rxe2 27... Kg7 does not save the day 28. e4 Ra3 29. Rg4+ Kf8 30. Rd8+ Ke7 31. Rd5+- 28. h5 >= 28. Rg4+ and White wins 28... Kf8 29. Rd8+ Ke7 30. Rgd4+- 28... h6 28... Kg7 29. Rg4+ Kh6 30. Rg8+- 29. Rfd4 29. Rxf6 seems even better 29... Re6 30. Rd8+ Kg7 31. Rxe6 fxe6+- 29... Ne6 29... Re5 30. Rg4+ Kh7 31. Rf1+- 30. Ra4 Rc2 30... a5 31. Rb1 Re5 32. Rxb6 Rxh5 33. Ra6+- 31. Bd5 Rc7 32. Bxe6 fxe6 33. Rda1 a5 34. Rb1 Rc6 35. Rd1 35. Rg4+ makes it even easier for White 35... Kf7+- 35... e5 36. Rd7 Re6 36... Kh8+- 37. Rc4 37. Rg4+ Kf8 38. Rgg7 Rd6 39. Rdf7+ Ke8 40. Rh7 Rd3 41. Ra7 Rd1+ 42. Kf2 Rd7 43. Rhxd7 e4 44. Rdb7 e3+ 45. Kxe3 b5 46. Ra8# 37... Kf8+- 38. Rcc7 38. Rc8+ Re8 39. Rcc7 e4 40. Rg7 Rc8 41. Rcf7+ Ke8 42. Rh7 Rc2 43. Rb7 Rc1+ 44. Kg2 Rc2+ 45. Kh3 Rh2+ 46. Kxh2 b5 47. Rh8# 38... e4 38... f5 39. Rh7 Kg8 40. Rhg7+ Kf8 41. Rcf7+ Ke8 42. Rh7 Rd6 43. Ra7 Rd1+ 44. Kh2 Rd7 45. Rhxd7 f4 46. Rdb7 fxg3+ 47. Kxg3 b5 48. Ra8# 39. Rd8+ Re8 40. Rxe8+ Kxe8 41. Rc6 41. Rb7 and White can already relax 41... a4 42. Rxb6 f5+- 41... Ke7 41... b5 does not win a prize 42. Rxf6 b4 43. Rxh6+- 42. Rxb6 e3 43. Ra6 e2 44. Kf2 1-0 [Fritz 9 (60s)]