[Event "Cincinnati  op"]
[Site "Cincinnati"]
[Date "1964.07.12"]
[Round "4"]
[White "Underhill, Roger"]
[Black "Edwards, Bert"]
[Result "1-0"]
[ECO "C78"]
[PlyCount "127"]
[EventDate "1964.07.11"]
[EventCountry "USA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Bc5 6. d3 b5 7. Bb3 Qe7 8. Bg5 h6 9. Bh4 Na5 10. c3 Nxb3 11. Qxb3 d6 12. d4 Ba7 13. Nbd2 Be6 14. Qc2 Bd7 15. Rad1 c5 16. dxe5 dxe5 17. c4 0-0 18. Qc3 Rfe8 19. Rfe1 Bc6 20. Bg3 Nd7 21. Nh4 g6 22. Qe3 Kh7 23. Nhf3 Rad8 24. Nb3 Bb6 25. Qc3 f6 26. Rd2 Nf8 27. Na5 Ba8 28. Nb3 Ne6 29. Rxd8 Rxd8 30. Bh4 g5 31. Bg3 Qf7 32. cxb5 axb5 33. h4 g4 34. Nh2 h5 35. Nf1 c4 36. Nc1 Nc5 37. Nd2 Qd7 38. Re2 Qd4 39. Qb4 Nxe4 40. Nxe4 Bxe4 41. Qxb5 Ba8 42. Kh2 Rb8 43. Qb4 Qd5 44. Qe7+ Kg6 45. f4 gxf3 46. Bxe5 Qf7 47. Qxf7+ Kxf7 48. Bxb8 fxe2 49. Nxe2 Be3 50. Bf4 Bf2 51. Kh3 f5 52. Bc1 Kg6 53. Nf4+ Kf7 54. Nxh5 Be4 55. Nf4 Bc2 56. Bd2 Bd1 57. g3 Bf3 58. Bc3 Be3 59. Be5 Bg1 60. h5 Bg4+ 61. Kg2 Be3 62. h6 Kg8 63. a4 Bd1 64. a5 1-0

[Event "Cincinnati  op"]
[Site "Cincinnati"]
[Date "1964.07.12"]
[Round "5"]
[White "Underhill, Roger"]
[Black "Suttles, Duncan"]
[Result "0-1"]
[ECO "B06"]
[PlyCount "138"]
[EventDate "1964.07.11"]
[EventCountry "USA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 g6 2. Nf3 Bg7 3. c3 d6 4. d4 Bg4 5. h3 Bxf3 6. Qxf3 e5 7. dxe5 dxe5 8. Bc4 Qf6 9. Nd2 Nd7 10. 0-0 Bh6 11. Qxf6 Ngxf6 12. f3 Nh5 13. Nb3 Bxc1 14. Rfxc1 Nb6 15. Na5 Nf4 16. Rd1 h5 17. Bb5+ c6 18. Bc4 Ke7 19. Bb3 Rab8 20. Rd2 h4 21. Rad1 f6 22. Nc4 Rbd8 23. Rxd8 Rxd8 24. Rxd8 Kxd8 25. Nd6 Nd3 26. Kf1 Kd7 27. Nxb7 Kc7 28. Na5 Nxb2 29. Bf7 g5 30. Ke2 N6a4 31. Kd2 Nc5 32. Nb3 Nbd3 33. Bc4 Nxb3+ 34. axb3 Nf4 35. Bf1 Kb6 36. Kc2 c5 37. Kd2 a5 38. Kc2 Nh5 39. Kb2 Ng3 40. Bd3 Nh5 41. Kc2 Ng7 42. Kb2 Ne8 43. Ka3 Nd6 44. c4 Nc8 45. Ka4 Na7 46. Ka3 Nc6 47. Ka4 Nb8 48. Bf1 Nd7 49. Bd3 Ka6 50. Ka3 Nb6 51. Bf1 Kb7 52. Bd3 Kc6 53. Be2 Kd6 54. Bf1 Ke6 55. Bd3 Kf7 56. Be2 Kg6 57. Bd3 g4 58. fxg4 Kg5 59. Be2 Kf4 60. Bf3 Kg3 61. Kb2 a4 62. Ka3 axb3 63. Kxb3 Nc8 64. Kc3 Nd6 65. Kd3 Kf2 66. g5 fxg5 67. Bg4 Kxg2 68. Be6 Kf3 69. Bg4+ Kf4 0-1

[Event "Cincinnati  op"]
[Site "Cincinnati"]
[Date "1964.07.11"]
[Round "3"]
[White "Berry, George Wendel"]
[Black "Underhill, Roger"]
[Result "0-1"]
[ECO "C50"]
[PlyCount "62"]
[EventDate "1964.07.11"]
[EventCountry "USA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 d6 4. d4 Be7 5. h3 Nf6 6. Nc3 0-0 7. Be3 a6 8. a4 Nxe4 9. Nxe4 d5 10. Nxe5 Nxe5 11. dxe5 dxc4 12. Qe2 Qd5 13. Bf4 Bf5 14. Nc3 Qxg2 15. 0-0-0 Qc6 16. Nd5 Rae8 17. Nc3 Bb4 18. Qe3 Bxc3 19. Qxc3 Qxa4 20. Be3 Re6 21. f4 b5 22. Bc5 Rc8 23. Bb4 h6 24. b3 cxb3 25. cxb3 Qa2 26. Qb2 Qxb2+ 27. Kxb2 c5 28. Be1 c4 29. b4 Rg6 30. Kc3 Rg2 31. Ra1 Rd8 0-1

[Event "Cincinnati  op"]
[Site "Cincinnati"]
[Date "1964.07.11"]
[Round "1"]
[White "Leder, Gus"]
[Black "Underhill, Roger"]
[Result "0-1"]
[ECO "A00"]
[PlyCount "90"]
[EventDate "1964.07.11"]
[EventCountry "USA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. b4 e5 2. Bb2 Bxb4 3. Bxe5 Nf6 4. a3 Ba5 5. Nf3 Nc6 6. Bb2 d6 7. e3 0-0 8. Be2 Ne7 9. 0-0 c5 10. d4 Qb6 11. Qc1 Ne4 12. c3 d5 13. Ne5 c4 14. f3 Nd6 15. Nd2 Nef5 16. e4 Re8 17. Kh1 Ne3 18. Re1 f6 19. Ng4 Nxg4 20. fxg4 dxe4 21. Bxc4+ Kh8 22. Be2 Bd7 23. Rb1 Rac8 24. Ba1 Qc7 25. c4 e3 26. Nb3 Bxe1 27. Qxe1 Ne4 28. Na5 b6 29. Nb3 Bxg4 30. c5 Qf4 31. Bb5 Re7 32. c6 e2 33. d5 Nf2+ 34. Kg1 Nh3+ 35. gxh3 Bxh3 36. Bxe2 Qe3+ 37. Qf2 Qxe2 38. Qxe2 Rxe2 39. Nd4 Rd2 40. Bc3 Rd3 41. Rc1 Rd8 42. c7 Rxd5 43. Bb2 Rc5 44. Nb5 Rxc1+ 45. Bxc1 Rd1+ 0-1

[Event "Cincinnati  op"]
[Site "Cincinnati"]
[Date "1964.07.11"]
[Round "2"]
[White "Underhill, Roger"]
[Black "Schubert, Greg"]
[Result "1-0"]
[ECO "B30"]
[PlyCount "61"]
[EventDate "1964.07.11"]
[EventCountry "USA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. c4 Nf6 4. Nc3 e5 5. d3 d6 6. Be2 Be6 7. Bg5 h6 8. Bh4 Be7 9. Qd2 Qd7 10. Nd5 Qd8 11. Bxf6 Bxf6 12. a3 Nd4 13. Nxd4 cxd4 14. Nxf6+ Qxf6 15. 0-0 0-0 16. f4 Qe7 17. f5 Bd7 18. f6 Qe6 19. Rf5 Kh7 20. fxg7 Kxg7 21. Raf1 f6 22. R1f3 Be8 23. Rg3+ Bg6 24. Bh5 Qf7 25. Bxg6 Qxg6 26. Qf2 Rg8 27. Rxg6+ Kxg6 28. Rxf6+ Kh7 29. Qf5+ Kh8 30. Rxh6+ Kg7 31. Rh7# 1-0

[Event "Fischer tour sim"]
[Site "Toledo"]
[Date "1964.03.19"]
[Round "?"]
[White "Fischer, Robert James"]
[Black "Underhill, Roger"]
[Result "0-1"]
[ECO "C30"]
[PlyCount "62"]
[EventDate "1964.03.??"]
[EventType "simul"]
[EventRounds "1"]
[EventCountry "USA"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 e5 2. f4 Bc5 3. Nf3 Nc6 4. fxe5 d6 5. d4 Bb6 6. exd6 Qxd6 7. c3 Bg4 8. Bd3 0-0-0 9. Be3 Ne5 10. Be2 Bxf3 11. gxf3 f6 12. Nd2 Qe7 13. Qb3 g5 14. 0-0-0 Nh6 15. Nc4 Nxc4 16. Bxc4 Kb8 17. Kb1 Nf5 18. Bc1 Nh4 19. Rhf1 f5 20. exf5 Nxf5 21. Rfe1 Qg7 22. Rg1 h6 23. Bd3 Rhf8 24. Qc2 Nh4 25. f4 g4 26. Qf2 Nf5 27. Rde1 h5 28. Re5 Nxd4 29. Rxh5 Nf3 30. Qxf3 gxf3 31. Rxg7 Rxd3 0-1

[Event "USA Junior-ch"]
[Site "Omaha"]
[Date "1959.07.13"]
[Round "2"]
[White "Harmon, Clark R"]
[Black "Underhill, Roger"]
[Result "1-0"]
[ECO "A50"]
[PlyCount "87"]
[EventDate "1959.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 b6 4. Bg5 Be7 5. e4 0-0 6. Bd3 d6 7. Qc2 e5 8. Nge2 Nc6 9. a3 exd4 10. Nb5 h6 11. Bh4 Ne5 12. Nbxd4 Bd7 13. Nc3 c5 14. Nde2 Bg4 15. 0-0 Nh5 16. Bxe7 Qxe7 17. Nd5 Qh4 18. f3 Bxf3 19. gxf3 Qh3 20. Nef4 Nxf3+ 21. Rxf3 Qxf3 22. Be2 Qxf4 23. Nxf4 Nxf4 24. Rd1 Rad8 25. Bg4 Ng6 26. Qa4 Ne5 27. Be2 Rd7 28. Rd5 Rfd8 29. Qd1 g6 30. Bg4 f5 31. exf5 gxf5 32. Be2 f4 33. Kf2 f3 34. Bxf3 Rf8 35. Rxe5 Rxf3+ 36. Kxf3 Rf7+ 37. Ke4 dxe5 38. Kxe5 Kf8 39. Qg4 Ke7 40. Qe6+ Kf8 41. Qxh6+ Ke8 42. Qh5 Ke7 43. h4 a6 44. Qg6 1-0

