[Event "GRONINGEN"] [Site "GRONINGEN"] [Round "0"] [White "Yanofsky"] [Black "Botvinnik"] [Result "1-0"] [ECO "C70"] [Opening "Spanish: 4.Ba4"] {The d-pawn forward, and an open c-file} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 cxd4 13. cxd4 Nc6 14. d5 Nb4 15. Bb1 a5 16. Nf1 (16. a3 Na6 17. b4) 16... Bd7 17. Bd2 Rfc8 {Black is quite prepared to accept the doubling of his b-pawns, in return for which he retains the two Bishops and gets the open a-file} 18. Bxb4 axb4 19. Bd3 Bd8 20. Qd2 Qa5 21. Ne3 b3 { Dissolving the doubled pawns} 22. a3 Qa4 23. Nd1 b4 24. Ne3 bxa3 25. Rxa3 Nxe4 $1 {This is the point of Black's Queenside operation. In return for the b-pawn, which is bound to fall, he wins a valuable centre pawn} 26. Qd1 Qb4 27. Rxb3 Qa4 28. Bc2 Nc5 29. Rc3 Qb4 30. Qb1 {So far Black has the better of it, with two Bishops and the majority of the pawns in the centre; but with this move White begins counteraction} 30... g6 31. Rc4 Qb7 32. b4 Na6 33. Rxc8 Rxc8 34. Bd3 $1 Nxb4 $2 (34... Rb8 $17) 35. Re2 $1 Ba5 $2 (35... Rc1+ 36. Qxc1 Nxd3 { drawing chances}) 36. Rb2 Rb8 37. Nd2 $1 Qa7 38. Ndc4 Qc5 39. Nxa5 Qxa5 40. Nc2 Nxd3 {Otherwise a whole piece goes. Thus Black has been compelled to cede the exchange after all, and under conditions much less favourable than he could have obtained by sacrificing it at the 35th move, for then he would have kept his two Bishops} 41. Rxb8+ Kg7 42. Ne3 Qd2 43. Qf1 Nc5 44. Qd1 Qc3 45. Rb6 Ba4 46. Qf3 Qe1+ 47. Kh2 f5 48. Rxd6 f4 49. Nf5+ Kf7 (49... gxf5 50. Qh5 $1 { wins quickly}) 50. Qg4 Ne4 (50... Qe4 51. Qh4 Qxf5 52. Qxh7+ Kf8 53. Rxg6) 51. Qh4 gxf5 52. Qxh7+ Ke8 53. Qg8+ {This example has shown how the open c-file can bring tactical elements to the forefront} 1-0