[Event "URS-ch25 Quarterfinal"]
[Site "Minsk"]
[Date "1957.05.22"]
[Round "18"]
[White "Vark, Kalju"]
[Black "Petersons, Andrejs"]
[Result "0-1"]

1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 O-O 5. d4 d6 6. e4 Nc6 7. Nge2 e5 8. d5 Nd4 9. Nxd4 exd4 10. Ne2 Ng4 11. Nxd4 Qf6 12. Nf3 Re8 13. O-O Rxe4 14. Rb1 Rxc4 15. Qe2 b5 16. Qe8+ Bf8 17. Bg5 Qf5 18. Qxb5 Rc5 19. Qa4 Bd7 20. Qa3 Bb5 21. Rfe1 Ne5 22. Nxe5 Qxg5 23. Nd3 Rc2 24. Nf4 a5 25. Be4 Rc5 26. b4 Rc4 27. h4 Qf6 28. bxa5 Bd7 29. a6 Ra4 30. Qc1 R4xa6 31. Qxc7 R6a7 32. Rb7 Rxb7 33. Qxb7 Qd8 34. h5 Rb8 35. Qa6 Rb2 36. hxg6 hxg6 37. Rb1 Rxb1+ 38. Bxb1 Qf6 39. Qb7 Bg4 40. a4 g5 41. Ng2 Qa1 42. Kh2 Qc3 43. Qb5 Bf3 44. a5 Qh8+ 45. Kg1 Qh3 46. Qf1 Bxd5 47. f4 Bg7 0-1