25th USSR Championship — Riga 1958ROUND 18
[Event "URS-ch25 Final"]
[Site "Riga"]
[Date "1958.02.11"]
[Round "18"]
[White "Petrosian, Tigran V"]
[Black "Boleslavsky, Isaak"]
[Result "1/2-1/2"]
1. Nf3 Nf6 2. g3 g6 3. b3 b6 4. Bg2 Bb7 5. c4 Bg7 6. Bb2 O-O 7. O-O d6 8. d4 Nbd7 9. Qc2 c5 10. Nc3 a6 11. Rad1 b5 12. d5 Nb6 13. Nd2 Nfd7 14. Rc1 Rb8 15. h3 bxc4 16. bxc4 Qc7 17. Nd1 Bxb2 18. Nxb2 e6 19. dxe6 fxe6 20. Bxb7 Qxb7 21. Nd3 Rbe8 22. Nf4 Ne5 23. Nd3 Ned7 24. Nf4 Ne5 25. Nd3 Ned7 1/2-1/2