[Event "SUI-ch"]
[Site "Graechen"]
[Date "2009.07.12"]
[Round "4"]
[White "Klauser, Markus"]
[Black "Kortschnoj, Viktor Lvovich"]
[Result "0-1"]
[WhiteElo "2386"]
[BlackElo "2561"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. h4 c5 7. Bxe7 Qxe7 8. Nb5 O-O 9. c3
Nc6 10. f4 cxd4 11. cxd4 Qb4+ 12. Qd2 Qxd2+ 13. Kxd2 a6 14. Nc7 Ra7 15. Rc1 Ndb8 16. a4 b6
17. b4 Nxb4 18. Rh3 N4c6 19. Rb3 Rxc7 20. Rxb6 Bb7 21. Nf3 Rfc8 22. Rcb1 Na5 23. Bd3 Nd7
24. R6b2 h6 25. h5 Bc6 26. Bxa6 Nc4+ 27. Bxc4 dxc4 0-1