[Event "IBM"]
[Site "Amsterdam"]
[Date "1973.??.??"]
[Round "11"]
[White "Spassky, Boris Vasilievich"]
[Black "Marovic, Drazen"]
[Result "1/2-1/2"]

1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 a6 8. cxd5 exd5 9. Bd3 c6 10. O-O Re8 11. a3 a5 12. Rb1 Ne4 13. Bxe4 Bxg5 14. Bd3 Be7 15. b4 Bd6 1/2-1/2