[Event "Siegen ol (Men) fin-A"]
[Site "Siegen FRG"]
[Date "1970.09.15"]
[EventDate "?"]
[Round "2"]
[Result "1-0"]
[White "Viktor Korchnoi"]
[Black "Klaus Viktor Darga"]
[ECO "A33"]
[WhiteElo "?"]
[BlackElo "?"]
[PlyCount "75"]

1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. g3 Bc5
7. Nb3 Bb4 8. Bg2 d5 9. cxd5 Nxd5 10. a3 Bxc3+ 11. bxc3 Qf6
12. Qc2 O-O 13. c4 Nde7 14. Bb2 e5 15. O-O Qh6 16. Rfd1 Bf5
17. Qc1 Qh5 18. Qe3 Bg4 19. Rac1 Rad8 20. Rxd8 Rxd8 21. f3 Bc8
22. g4 Qg6 23. Bxe5 h5 24. gxh5 Qxh5 25. Bg3 Nf5 26. Qf2 Be6
27. Nc5 Nfd4 28. Nxe6 Nxe6 29. Qe3 Ncd4 30. Kf2 Qa5 31. Bh3
Nc5 32. Rd1 Ncb3 33. Qe7 Ra8 34. Qb4 Qd8 35. e3 Qf6 36. exd4
Nxd4 37. Qc3 Rd8 38. Rd2 1-0