[Event "Interzonal-11a"]
[Site "Riga"]
[Date "1979.09.24"]
[Round "14"]
[White "Van Riemsdijk, Herman Claudius"]
[Black "Polugaevsky, Lev"]
[Result "1/2-1/2"]
[WhiteElo "2390"]
[BlackElo "2625"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. g3 Nf6 7. Bg2 d6 8. O-O Be7 9. Qd2 O-O 10. b3 Bd7 11. Nce2 Nc6 12. c4 b5 13. Bb2 bxc4 14. Rfc1 Na5 15. f4 Rad8 16. h3 Qa7 17. bxc4 Nc6 18. Kh2 Rc8 19. Nb3 Rfd8 20. Ned4 Be8 21. Rd1 Nxd4 22. Bxd4 Qc7 23. Qe3 Nd7 1/2-1/2