It’s a Hard Life

Július Kozma – Roberto Cosulich
International Team Tournament Mediolanum; Milan, February 11, 1974
Nimzo-Indian Defence E43

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Bd3 Bb7 6. Nf3 Ne4 7. 0-0 f5 8. Qc2 Bxc3 9. bxc3 0-0 10. Ne1. Or else: 10. Nd2 Qh4 11. f3 Nxd2 12. Bxd2 Nc6 13. Rab1 Ne7 14. c5 Bc6 15. cxb6 axb6 16. Rb2 Rf6 17. e4 fxe4 18. Bxe4 Bxe4 19. Qxe4 Qxe4 20. fxe4 Rxf1+ 21. Kxf1 ½–½ Trincardi – Cosulich, 13th New Year’s International Tournament, Reggio Emilia 1970/71.
10. ... c5 11. f3 Nd6 12. e4 fxe4 13. fxe4 Rxf1+ 14. Kxf1 Qh4?! A bit too compromising. 14. ... e5! 15. Nf3 Nf7 gave Black a more than comfortable game in Muir – King, 74th British Chess Championship, Swansea 1987.
15. Nf3 Qg4 16. h3 Qg3

17. Be3?! Here and on the next few moves White might have played something like 17. d5 Nf7 18. Kg1 and consolidated his space advantage. Instead his half measures enable Cosulich to save himself in a drawn endgame.
17. ... Na6 18. Kg1 Rf8 19. Rf1 cxd4 20. Bxd4 Qg6 21. Ne5 Rxf1+ 22. Kxf1 Qh5 23. Qe2 Qxe2+ 24. Kxe2 Nxe4 25. Nxd7 Nec5 26. Nxc5 Nxc5 27. g3 Bg2 28. h4

28. ... Bf1+! 29. Kxf1 Nxd3 30. Ke2 Nc5 31. Ke3. White dares not exchange his Bishop for the Knight, as after 31. Bxc5? bxc5 32. g4 (32. Kf3 h5!) 32. ... h5! the Pawn ending would be lost for him.
31. ... Kf7 32. Be5 Nd7 33. Kd4 Nxe5 34. Kxe5 Ke7 35. g4 g6 36. g5 Kd7 37. c5! Nevertheless, White could also play 37. Kf6 Kd6 38. Kg7 e5 39. Kxh7 e4 40. h5! gxh5! 41. g6 e3 42. g7 e2 43. g8=Q e1=Q 44. Qd8+ Kc6 45. Qc8+ with a draw by perpetual check.
37. ... bxc5 38. c4! The fortress is now unbreakable.
38. ... Ke7 39. Kf4 Kd6 40. Ke4 ½–½.