[Event "Portoroz"] [Site "?"] [Round "0"] [White "Averbakh"] [Black "Neikirch"] [Result "1-0"] [ECO "C70"] [Opening "Spanish: 4.Ba4"] 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Nc6 13. dxe5 dxe5 14. Nf1 Bd6 15. Nh4 Ne7 16. Qf3 Rd8 17. Ne3 Qc6 $2 18. c4 {White plays for control of d5. Admittedly this weakens d4, but this is only of academic importance while Black has no way of occupying it} 18... Ne8 { Hoping to reach d4 by wat of c7 and e6} 19. Bb3 b4 (19... -- 20. cxb5 axb5 21. Qxf7+) 20. Nd5 Qb7 {This allows White to post the Bishop actively on a4.} ( 20... a5 21. Bg5 Ra7) 21. Ba4 Nc7 22. Bg5 Ncxd5 (22... Ne6 23. Bxe7 Bxe7 (23... Nd4 24. Nf6+ Kh8 25. Qh5 $18) 24. Bc6 $1) (22... f6 23. Nxf6+ gxf6 24. Qxf6 $40 ) 23. cxd5 f6 24. Be3 Bd7 {Now the siege on the c-pawn begins} (24... c4 25. Rac1) 25. Bxd7 Qxd7 26. Rac1 Rdc8 27. Rc4 Rab8 28. b3 Rc7 29. Rec1 Rb5 30. g4 $1 {The familiar motif: with most of the Black forces tied to the defence of the c-pawn, White opens a second front on the other side of the board} 30... g5 31. Ng2 Kg7 32. h4 h6 33. h5 $1 {Denying Black use of g6} 33... a5 34. Ne1 Qc8 35. Nd3 f5 {A rather desperate attempt to get some counterplay. Black is totally tied up by the need to defend the c-pawn. It is sufficiently protected now, but after White plays Qe2, Pf3 and Qf2 it would be lost anyway} (35... -- 36. Qe2 -- 37. f3 -- 38. Qf2) 36. exf5 Ng8 37. Re1 { Now the Black pawn is going to suffer} 37... Nf6 38. Bc1 $1 Rf7 (38... e4 39. Rcxe4 Nxe4 40. Qxe4) 39. Bb2 Qc7 40. Rce4 $1 {Beautifully decisive} 40... Nxe4 41. Qxe4 Kf6 42. Nxe5 1-0