[Event "Mexican op"]
[Site "Zacatecas"]
[Date "1973.??.??"]
[Round "?"]
[White "Ariel Pena, E."]
[Black "Campos Ruiz, Alberto"]
[Result "1-0"]
[ECO "C09"]
[PlyCount "61"]
[EventDate "1973.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "MEX"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 exd5 5. Bb5+ Nc6 6. Ngf3 Bd6 7. 0-0 Nge7 8. dxc5 Bxc5 9. Nb3 Bd6 10. Re1 0-0 11. Nbd4 Bg4 12. Bxc6 Nxc6 13. Qd3 Nxd4 14. Nxd4 Qh4 15. g3 Qh5 16. Bd2 a6 17. Re3 f5 18. f3 Bh3 19. f4 g5 20. Ne2 Qf7 21. Qd4 h6 22. Bc3 Kh7 23. Kh1 Rg8 24. fxg5 hxg5 25. Ng1 f4 26. gxf4 Bf5 27. Nh3 gxf4 28. Nxf4 Raf8 29. Rae1 Be4+ 30. Qxe4+ Rg6 31. Rh3+ 1-0

[Event "Mexican op"]
[Site "Zacatecas"]
[Date "1973.??.??"]
[Round "?"]
[White "Ariel Pena, E."]
[Black "Ramirez y Meza, Benito"]
[Result "1/2-1/2"]
[ECO "B28"]
[PlyCount "59"]
[EventDate "1973.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "MEX"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. Nf3 a6 4. Nxd4 Nf6 5. Nc3 e5 6. Nb3 Bb4 7. Bc4 Qc7 8. Qe2 b5 9. Bd3 Nc6 10. Bd2 Bxc3 11. Bxc3 b4 12. Bd2 a5 13. Be3 a4 14. Nd2 a3 15. bxa3 Rxa3 16. Nc4 Nd4 17. Bxd4 exd4 18. Nxa3 Qc3+ 19. Qd2 Qxa1+ 20. Ke2 Qxh1 21. Qxb4 Qxg2 22. Nc4 Nxe4 23. Bxe4 Qxe4+ 24. Kf1 Ba6 25. Qb8+ Ke7 26. Qd6+ Kd8 27. Qb6+ Ke7 28. Qd6+ Kd8 29. Qb6+ Ke7 30. Qd6+ 1/2-1/2

