Bertok, Mario VS Hess, Ralf 1978.12.??

[Event "Reggio Emilia-21 1978/79"]
[Site "Reggio Emilia"]
[Date "1978.12.??"]
[Round "?"]
[White "Bertok, Mario"]
[Black "Hess, Ralf"]
[Result "1/2-1/2"]
[WhiteElo "2415"]
[BlackElo "2285"]

1. c4 Nf6 2. Nc3 e6 3. d4 Bb4 4. e3 b6 5. Ne2 Ba6 6. a3 Bxc3+ 7. Nxc3 d5 8. b3 O-O 9. Be2 Nc6 10. cxd5 Bxe2 11. Nxe2 Qxd5 12. O-O Rad8 13. Qc2 1/2-1/2