[Event "US Open-73"]
[Site "Atlantic City"]
[Date "1972.??.??"]
[Round "1"]
[White "Kevitz, Alexander"]
[Black "Vavoulis, Don"]
[Result "1-0"]
[ECO "A58"]
[PlyCount "71"]
[EventDate "1972.08.13"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 g6 3. d4 c5 4. d5 b5 5. cxb5 d6 6. Nc3 Bg7 7. e4 Nbd7 8. Be2 0-0 9. 0-0 a6 10. bxa6 Bxa6 11. Re1 Nb6 12. h3 Nfd7 13. Bf4 Qc7 14. Qc2 Rfb8 15. Rab1 Rb7 16. b3 Nb8 17. e5 Bxe2 18. Rxe2 Qd7 19. Rbe1 Na6 20. Qd2 Nb4 21. a3 Rxa3 22. exd6 Bxc3 23. Qxc3 N6xd5 24. dxe7 Qe8 25. Qc4 Nxf4 26. Qxf4 Kg7 27. Ng5 Ra8 28. Nxf7 Nd3 29. Qh6+ Kxf7 30. Qxh7+ Kf6 31. Re6+ Kg5 32. f4+ Kf5 33. g4+ Kxf4 34. Qh6+ g5 35. R6e4+ Kf3 36. R1e3# 1-0

[Event "US Open-70"]
[Site "Lincoln"]
[Date "1969.08.20"]
[Round "10"]
[White "Spence, Jack"]
[Black "Vavoulis, Don"]
[Result "1-0"]
[ECO "C16"]
[PlyCount "91"]
[EventDate "1969.08.10"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 Qd7 5. Bd2 Nc6 6. a3 Bf8 7. Nf3 f6 8. Bd3 Qf7 9. 0-0 Nxd4 10. Nxd4 fxe5 11. Bb5+ Bd7 12. Bxd7+ Kxd7 13. Nf3 Bd6 14. Qe2 e4 15. Ng5 Qe8 16. Qb5+ Ke7 17. Qxe8+ Rxe8 18. f4 h6 19. Nh3 Nf6 20. b4 a6 21. Ne2 b6 22. Nd4 Kd7 23. Rad1 c5 24. Nb3 Rc8 25. bxc5 bxc5 26. Nf2 c4 27. Nd4 Bxa3 28. c3 Bd6 29. Ra1 Ra8 30. Rfb1 Rhb8 31. g4 Ne8 32. h4 Nc7 33. Be3 Rxb1+ 34. Rxb1 a5 35. g5 a4 36. Ng4 hxg5 37. hxg5 a3 38. Ne5+ Ke8 39. Nec6 Bc5 40. Kf2 Kf7 41. Ne5+ Ke8 42. Ndc6 Bxe3+ 43. Kxe3 a2 44. Rh1 d4+ 45. Kxd4 a1Q 46. Rh8# 1-0

