[Event "Great Britian vs USSR"] [Site "?"] [Round "0"] [White "Milner Barry"] [Black "Petrosian"] [Result "0-1"] [ECO "B90"] [Opening "Sicilian: Najdorf"] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. O-O O-O 9. f4 b5 {A typical reaction to White's kingside play.} 10. fxe5 dxe5 11. Bg5 {11.Qxd8 Rxd8 12.Bg5 b4 13.Nd5 Nxd5} 11... Nbd7 12. Bd3 { 12.Nd5 Nxd5 13.Qxd5 Bxg5 14.Qxa8 Qb6+ 15.Kh1 Bb7 would trap the White queen.} 12... b4 {12...Bb7 Finishing his development is also good.} 13. Ne2 a5 14. Ng3 a4 15. Nd2 Nc5 16. Nc4 Be6 {A mistake which should cost Black the initiative. 16...Ne6 17.Bd2 Qc7 when Black dominates the dark squares.} 17. Bxf6 { A very grave mistake. White parts with his good bishop and is left defenceless on the dark squares. 17.Nf5 Bxf5 18.Rxf5 With chances for both sides.} 17... Bxf6 18. Qe2 g6 19. Rad1 Bg5 { Black's king bishop takes control of the dark squares.} 20. Qf2 Qc7 21. Be2 Rfd8 22. b3 Rxd1 23. Rxd1 axb3 24. axb3 Ra2 {The occupation of the seventh rank is always a good idea. Now the pawn at c2 is a target, despite the fact that the c-file is closed.} 25. Qe1 Qb8 26. Bd3 h5 { With pressure on both wings White's position collapses.} 27. Nf1 Nxd3 28. cxd3 Bg4 {With this move Black wins material and the game. The control of the seventh rank limits the squares available to the White pieces.} 29. Ra1 Qa7+ { White resigned.} 0-1