[Event "Olympiad"] [Site "?"] [Round "0"] [White "Clarke"] [Black "Petrosian"] [Result "0-1"] [ECO "C02"] [Opening "French: Advance, 4.c3 Qb6"] 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Qb6 5. Nf3 Nc6 6. a3 {White's play, though accepted by the pundits of opening theory, is very slow and Black can often obtain the initiative.} 6... c4 7. g3 Bd7 8. Bg2 O-O-O 9. O-O Na5 { It is clear that Black is playing more actively.} 10. Nbd2 h6 11. Re1 Ne7 12. Nf1 Nf5 13. Ne3 {13.g4 would have been more active.} 13... Nxe3 14. Rxe3 Be7 15. Re1 Qb3 {Black stands better due to his queenside initiative. While, White has no counterplay.} 16. Qe2 Ba4 { Black prepares to penetrate on the light squares.} 17. Be3 Kb8 { 17...Qc2 would be more logical.} 18. Rad1 Qc2 19. Rd2 Qf5 20. Rf1 g5 { Having come to naught on the queenside Black switches his attention to the other wing.} 21. h3 h5 22. Nh2 Rdg8 23. g4 Qg6 24. Bf3 {Passive play is doomed to fail. Better was 24. f4. 24.f4 This more active move would have given White chances to survive.} 24... hxg4 25. Bxg4 Nc6 { The knight also makes its way to the kingside.} 26. f3 Bd8 27. Bf2 Ne7 28. Re1 Rh6 29. Nf1 Rgh8 30. Bg3 Rxh3 { This exchange sacrifice shows how fragile the White position is.} 31. Bxh3 Rxh3 32. Qg2 Qh7 33. Ne3 Ng6 34. Ng4 { Played to stop Black's intended pawn g4 and Bg5.} 34... Nf4 35. Bxf4 gxf4 36. Kf1 Rg3 37. Qf2 {37.Qh2 Rxf3+ 38.Rf2 Rh3 39.Qxf4 Rh1+ 40.Ke2 Qd3+ Mates.} 37... Qh3+ 38. Ke2 Rg2 39. Rg1 Rxf2+ 40. Nxf2 Qh7 41. Rh1 Qg6 { White resigned because of his material deficit.} 0-1