[Event "Riga"]
[Site "Riga URS"]
[Date "1959.12.20"]
[EventDate "?"]
[Round "13"]
[Result "1/2-1/2"]
[White "Wolfgang Pietzsch"]
[Black "Boris Spassky"]
[ECO "D27"]
[WhiteElo "?"]
[BlackElo "?"]
[PlyCount "61"]

1. Nf3 d5 2. d4 Nf6 3. c4 dxc4 4. e3 e6 5. Bxc4 c5 6. O-O a6
7. dxc5 Qxd1 8. Rxd1 Bxc5 9. a3 b5 10. Be2 Bb7 11. b4 Be7
12. Bb2 Nbd7 13. Nbd2 Rc8 14. Rac1 O-O 15. Ne5 Nxe5 16. Bxe5
Rfd8 17. Nb3 Rxd1+ 18. Bxd1 Rxc1 19. Nxc1 Nd7 20. Bb2 Nb6
21. Nb3 Nc4 22. Bc1 Bd5 23. Nd2 Nxd2 24. Bxd2 Bf6 25. a4 Bb2
26. axb5 axb5 27. Be2 Bc4 28. Kf1 f5 29. Ke1 Bxe2 30. Kxe2 e5
31. e4 1/2-1/2