[Event "Dortmunder Schachtage-11"]
[Site "Dortmund"]
[Date "1983.03.29"]
[Round "1"]
[White "Grzesik, Thomas"]
[Black "Bischoff, Klaus"]
[Result "1/2-1/2"]
[WhiteElo "2330"]
[BlackElo "2445"]

1. e4 c5 2. Nf3 e6 3. d3 Nc6 4. g3 d5 5. Nbd2 Nf6 6. Bg2 Be7 7. O-O b6 8. Re1 Bb7 9. e5 Nd7 10. h4 Qc7 11. Qe2 h6 12. Nf1 O-O-O 13. c3 Rdg8 14. N1h2 g5 15. hxg5 hxg5 16. Ng4 Rh5 17. a3 Rgh8 18. d4 Na5 19. b4 Nc4 20. Be3 Ba6 21. Reb1 cxb4 22. cxb4 b5 23. Ne1 Bb7 1/2-1/2