[Event "URS-ch18 Semifinal"]
[Site "Gorky"]
[Date "1950.09.??"]
[Round "?"]
[White "Ratner, Boris"]
[Black "Petrosian, Tigran V"]
[Result "0-1"]

1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. Nf3 Nbd7 5. g3 g6 6. Bg2 Bg7 7. O-O O-O 8. Qc2 Re8 9. b3
c6 10. e3 Qa5 11. h3 Nf8 12. dxe5 dxe5 13. Bb2 Bf5 14. Qe2 Ne4 15. Rac1 Nc5 16. e4 Bd7 17.
Qc2 Qb6 18. Ne2 a5 19. Bc3 f5 20. Nd2 Nfe6 21. Nf3 Nf8 22. Nd2 fxe4 23. Nxe4 Bf5 24. g4
Bxe4 25. Bxe4 Nfe6 26. Rcd1 Rad8 27. Bg2 Nd4 28. Qb2 Rf8 29. Nxd4 exd4 30. Rxd4 Na4 31.
bxa4 Qxb2 32. Bxb2 Bxd4 33. Ba3 Rf4 34. Bc1 Rxf2 35. Rxf2 Rf8 36. Kh2 Rxf2 37. Kg3 Rxa2
38. Bg5 Ra3+ 39. Kh2 Rxa4 40. Bf1 Ra1 41. Bd3 a4 42. c5 a3 43. Bc4+ Kg7 0-1