[Event "US Open-72"]
[Site "Ventura"]
[Date "1971.??.??"]
[Round "8"]
[White "Kakimi, Ben"]
[Black "Regan, Marc J"]
[Result "0-1"]
[ECO "B07"]
[PlyCount "80"]
[EventDate "1971.08.08"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bg5 h6 5. Bf4 Bg7 6. Qd2 g5 7. Bg3 Nh5 8. 0-0-0 Nxg3 9. hxg3 e6 10. Bc4 a6 11. Bb3 b5 12. a3 Nd7 13. Kb1 Bb7 14. Nh3 c5 15. d5 c4 16. Ba2 Nc5 17. f4 Qa5 18. dxe6 0-0-0 19. Nf2 fxe6 20. e5 dxe5 21. Qe3 b4 22. axb4 Qxb4 23. fxe5 Nd7 24. Ng4 Rhf8 25. Rd4 Nb6 26. Rhd1 a5 27. Nf6 Bxf6 28. exf6 Bd5 29. Nxd5 exd5 30. c3 Qb5 31. Qe6+ Rd7 32. Ka1 Na4 33. R1d2 Qb6 34. Qg4 h5 35. Qxh5 Rxf6 36. Qxg5 Rf1+ 37. Bb1 Qb5 38. Rxd5 Rxb1+ 39. Kxb1 Nxc3+ 40. Kc2 Nxd5 0-1

[Event "US Open-72"]
[Site "Ventura"]
[Date "1971.??.??"]
[Round "2"]
[White "Karklins, Andrew"]
[Black "Regan, Marc J"]
[Result "1-0"]
[ECO "C02"]
[PlyCount "53"]
[EventDate "1971.08.08"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. a3 a5 7. Bd3 Bd7 8. 0-0 Rc8 9. Qe2 c4 10. Bc2 h5 11. Ng5 Nce7 12. Qf3 f6 13. exf6 Nxf6 14. Re1 Ra8 15. Nd2 a4 16. Qe2 Ra6 17. Ndf3 Rg8 18. Ne5 g6 19. Nxd7 Kxd7 20. Qf3 Ne4 21. Bxe4 dxe4 22. Nxe4 Kc8 23. Nc5 Nf5 24. Rxe6 Qxe6 25. Qxb7+ Kd8 26. Nxe6+ Rxe6 27. Qd5+ 1-0

[Event "US Open-72"]
[Site "Ventura"]
[Date "1971.??.??"]
[Round "4"]
[White "Tarjan, James Edward"]
[Black "Regan, Marc J"]
[Result "1-0"]
[ECO "B40"]
[PlyCount "93"]
[EventDate "1971.08.08"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. e4 e6 2. d3 d5 3. Nd2 Nf6 4. Ngf3 c5 5. Be2 Nc6 6. 0-0 Be7 7. c3 Qc7 8. Re1 0-0 9. a3 Bd7 10. b4 Rac8 11. Bb2 Rfd8 12. Bf1 dxe4 13. dxe4 a6 14. e5 Ng4 15. Qe2 f6 16. exf6 gxf6 17. Ne4 Nce5 18. Nxe5 Nxe5 19. c4 cxb4 20. axb4 Qxc4 21. Qh5 Qc7 22. Nxf6+ Bxf6 23. Bxe5 Bxe5 24. Rxe5 Kh8 25. Rae1 Rg8 26. g3 Rcf8 27. Rc5 Qb6 28. Qe5+ Rg7 29. Qc3 Kg8 30. Re3 Bb5 31. Bxb5 axb5 32. Qe5 Rg6 33. Rxb5 Qd8 34. Rxb7 Qd1+ 35. Kg2 Rgf6 36. Qg5+ Rg6 37. Qe5 Rgf6 38. Re2 Qb3 39. Re7 Qxb4 40. Rxe6 Qb7+ 41. Kg1 Qb1+ 42. Re1 Qg6 43. Rxf6 Qxf6 44. Qxf6 Rxf6 45. Kg2 Kg7 46. f4 Kg6 47. Kf3 1-0

