[Event "Interzonal-11a"]
[Site "Riga"]
[Date "1979.09.16"]
[Round "9"]
[White "Trois, Francisco R Torres"]
[Black "Van Riemsdijk, Herman Claudius"]
[Result "1/2-1/2"]
[WhiteElo "2415"]
[BlackElo "2390"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. Nf3 Nd7 7. h4 h6 8. h5 Bh7 9. Bd3 Bxd3 10. Qxd3 e6 11. Bd2 Qc7 12. O-O-O Ngf6 13. Kb1 O-O-O 14. Qe2 Bd6 15. Ne4 Bf4 16. Nxf6 1/2-1/2