[Event "10"] [Site "Moscow ch-SU"] [Round "0"] [White "Ratner"] [Black "Botvinnik"] [Result "0-1"] [ECO "D85"] [Opening "Gruenfeld: Exchange, 5.e4"] {The c-pawn plays a part} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 c5 7. Bc4 Bg7 8. Ne2 O-O 9. O-O Nd7 {The real neo-classic centre is not formed, for Black has still to exchange on d4. He continues to postponed this pawn trade, so we can speak of a sort of enlarge neo-classic centre} 10. a4 $2 {This works out poorly} (10. Bg5 h6 11. Be3 { White will win an important tempo with Qd2}) 10... Qc7 {If White has chosen the correct move Bg5, then he could now have played Rc1 with good chances} 11. Ba2 {So White has had to lose a tempo; it is now clear taht Black has a very satisfactory game} 11... b6 12. Be3 Ba6 13. Re1 Rad8 { Thematic pressure against d4} 14. Qb3 (14. f4 e5 $1) 14... e5 $1 {White is ther eby induced to make the following unfavourable change in his central pawnformation} 15. d5 (15. -- exd4 16. cxd4 Bxe2 17. Rxe2 cxd4) (15. dxe5 Qxe5 {White wins a pawn}) (15. dxc5 Nxc5 {White's Queenside pawns}) 15... c4 $1 16. Qa3 f5 {Now it's apparent that Black's strategy has been completely successful. White's centre is only a target and Black has excellent squares for his pieces at c5 and d3} 17. Bg5 (17. f3 f4 18. Bf2 g5 { Black has a strong attacking formation on the Kingside}) 17... Bf6 18. Bh6 Rf7 19. exf5 (19. f3 f4 {and the Bh6 is cut off}) 19... gxf5 20. a5 b5 21. Rad1 Nc5 22. Ng3 Be7 23. Qc1 f4 24. Nh5 Qd6 25. Bg7 Rxg7 26. Nxg7 Kxg7 27. Bb1 Bc8 28. Qc2 Rh8 29. Qe2 Bf6 30. Qh5 Bd7 31. Bc2 e4 32. Bxe4 Qe5 33. Qf3 Re8 34. Bd3 Qxe1+ 35. Rxe1 Rxe1+ 36. Bf1 Ne4 37. Qxf4 Nxc3 38. Qg3+ Kf7 0-1