[Event "US Open-72"]
[Site "Ventura"]
[Date "1971.??.??"]
[Round "6"]
[White "Jacobs, Daniel R"]
[Black "Gruchacz, Robert"]
[Result "1-0"]
[ECO "B51"]
[PlyCount "43"]
[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 c5 2. Nf3 d6 3. Bb5+ Nd7 4. d4 cxd4 5. Qxd4 a6 6. Bxd7+ Bxd7 7. 0-0 Nf6 8. Bg5 e6 9. Rd1 Be7 10. e5 dxe5 11. Nxe5 Bb5 12. c4 Qxd4 13. Rxd4 Bd7 14. Nc3 Rd8 15. Rad1 Bc8 16. Rxd8+ Bxd8 17. Rxd8+ Kxd8 18. Nxf7+ Ke8 19. Nxh8 Kf8 20. Bxf6 gxf6 21. Ne4 Kg7 22. Nd6 1-0

[Event "US Open-72"]
[Site "Ventura"]
[Date "1971.??.??"]
[Round "9"]
[White "Jacobs, Daniel R"]
[Black "Metz, Frank A"]
[Result "0-1"]
[ECO "C08"]
[PlyCount "54"]
[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. Nd2 c5 4. exd5 exd5 5. Ngf3 Nf6 6. Bb5+ Nc6 7. 0-0 Qb6 8. Qe2+ Be6 9. Ng5 0-0-0 10. Nxe6 Re8 11. Bxc6 bxc6 12. c4 cxd4 13. cxd5 cxd5 14. Nb3 Rxe6 15. Qd3 Bd6 16. Nxd4 Re4 17. Nb5 Bc5 18. Bd2 Bxf2+ 19. Kh1 Kb8 20. Rac1 Rd8 21. Rc3 Ng4 22. Rb3 Ka8 23. h3 Be3 24. Bxe3 Rxe3 25. Qxh7 Rxb3 26. axb3 Qxb5 27. Rxf7 Qb8 0-1

[Event "US Open-72"]
[Site "Ventura"]
[Date "1971.??.??"]
[Round "1"]
[White "Romero, Jose R"]
[Black "Jacobs, Daniel R"]
[Result "1-0"]
[ECO "B02"]
[PlyCount "97"]
[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 Nf6 2. Nc3 d5 3. exd5 Nxd5 4. Bc4 Nb6 5. Bb3 Nc6 6. Nf3 e5 7. h3 Be7 8. 0-0 0-0 9. Re1 Bf6 10. Ne4 Re8 11. d3 h6 12. Nh2 Nd4 13. Ng4 Bxg4 14. Qxg4 Nxb3 15. axb3 Kh8 16. Qh5 Kg8 17. Re3 Bg5 18. Rf3 g6 19. Bxg5 gxh5 20. Bxd8 Rexd8 21. Nf6+ Kf8 22. Ra5 Nd7 23. Nxd7+ Rxd7 24. Rxe5 Re8 25. Rxe8+ Kxe8 26. Rf5 Kf8 27. Rxh5 Kg7 28. Re5 Kf6 29. Re8 c5 30. f4 Rd6 31. g4 Ra6 32. Re2 Ra2 33. c3 Ra1+ 34. Kf2 Rd1 35. Ke3 Rh1 36. Ke4 Rxh3 37. Rg2 Rh1 38. Kd5 b6 39. Kc6 Rd1 40. Kb7 Rxd3 41. Kxa7 Rd6 42. Rh2 Kg6 43. Rh5 Rf6 44. Rxh6+ Kxh6 45. g5+ Kg6 46. gxf6 Kxf6 47. Kxb6 Kf5 48. Kxc5 Kxf4 49. b4 1-0

