[Event "IBM"]
[Site "Amsterdam"]
[Date "1974.07.30"]
[Round "12"]
[White "Ivkov, Borislav"]
[Black "Ribli, Zoltan"]
[Result "1/2-1/2"]

1. Nf3 g6 2. d4 Nf6 3. c4 Bg7 4. Nc3 d5 5. Bg5 Ne4 6. cxd5 Nxg5 7. Nxg5 e6 8. Nf3 exd5 9. e3 Qd6 10. Be2 O-O 11. O-O c6 12. a3 1/2-1/2