[Event "USA-ch"]
[Site "Chicago"]
[Date "1974.??.??"]
[Round "7"]
[White "Grefe, John Alan"]
[Black "Zuckerman, Bernard"]
[Result "1/2-1/2"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. O-O O-O 9. a4 Nc6 10. Be3 1/2-1/2