[Event "URS-ch25 Quarterfinal"]
[Site "Minsk"]
[Date "1957.05.11"]
[Round "11"]
[White "Vark, Kalju"]
[Black "Ostrauskas, A"]
[Result "1/2-1/2"]

1. d4 d5 2. c4 e6 3. Nc3 f5 4. g3 c6 5. Bg2 Nf6 6. Nh3 Bd6 7. O-O O-O 8. Bf4 Qe7 9. e3 b6 10. cxd5 exd5 11. Rc1 Bb7 12. Qb3 Nbd7 13. Rfe1 Kh8 14. Bxd6 Qxd6 15. Nf4 g5 16. Nd3 Ba6 17. Ne2 Rae8 18. Qb4 Qe6 19. Qa3 Bb5 20. Ne5 Nxe5 21. dxe5 Qxe5 22. Nd4 f4 23. Nf3 Qf5 24. exf4 gxf4 25. Nd4 Qd7 26. Qc3 fxg3 27. hxg3 Kg8 28. Rxe8 Qxe8 29. Nxc6 Bxc6 30. Qxc6 Qe5 31. Qb5 Rd8 32. Qb4 d4 33. Re1 Qc5 34. Qb3+ Kg7 35. Bf1 Rd7 36. Qf3 Qd5 37. Qxd5 Nxd5 38. Bc4 Nc7 39. f4 Kf6 40. Kf2 h6 41. Rh1 Kg7 42. Kf3 b5 43. Bb3 a5 44. a4 Re7 45. Bc2 Re3+ 46. Kf2 b4 47. Rh5 Ne8 48. Rxa5 Nf6 49. Ra7+ Kf8 50. Bf5 1/2-1/2