[Event "Las Vegas National op"]
[Site "Las Vegas"]
[Date "1974.03.18"]
[Round "2"]
[White "Bone, Eric Dale"]
[Black "Marvin, S."]
[Result "1-0"]
[ECO "B28"]
[PlyCount "27"]
[EventDate "1974.03.??"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "USA"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 a6 3. c3 d5 4. exd5 Qxd5 5. d4 Nf6 6. Be2 cxd4 7. cxd4 Bg4 8. Nc3 Qa5 9. Qb3 b5 10. Ng5 e6 11. Bxg4 Nxg4 12. Nxe6 b4 13. Ne4 Qf5 14. Nxg7+ 1-0

[Event "Las Vegas National op"]
[Site "Las Vegas"]
[Date "1973.03.12"]
[Round "2"]
[White "Kavalek, Lubomir"]
[Black "Marvin, S."]
[Result "1-0"]
[ECO "C19"]
[PlyCount "67"]
[EventDate "1973.03.??"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "USA"]
[SourceTitle "EXT 2007"]
[Source "ChessBase"]
[SourceDate "2006.11.23"]
[SourceVersion "1"]
[SourceVersionDate "2006.11.23"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Nf3 Qc7 8. Be2 Nbc6 9. 0-0 Bd7 10. a4 b6 11. Re1 0-0 12. Bf1 f6 13. g3 Rae8 14. h4 Nc8 15. Bf4 f5 16. h5 Nd8 17. a5 Nf7 18. axb6 axb6 19. c4 Bc6 20. dxc5 bxc5 21. cxd5 Bxd5 22. c4 Bc6 23. Qb3 Nb6 24. Ng5 Nxg5 25. Bxg5 Rb8 26. Qe3 h6 27. Bf4 Bb7 28. Be2 Qc6 29. f3 Rfc8 30. Red1 Rd8 31. Kf2 Rbc8 32. Rab1 Ba6 33. Qb3 Rb8 34. Rxd8+ 1-0

