| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 51. G Hartleb vs S Zilius |
| 1-0 | 26 | 1957 | 58th US Open | D31 Queen's Gambit Declined |
| 52. J Glenn Waltz vs G Hartleb |
| 1-0 | 23 | 1957 | 58th US Open | A06 Reti Opening |
| 53. S Van Gelder vs G Hartleb |
| 0-1 | 14 | 1957 | 58th US Open | C44 King's Pawn Game |
| 54. R Weinstein vs G Hartleb |
| 1-0 | 47 | 1957 | 58th US Open | D60 Queen's Gambit Declined, Orthodox Defense |
| 55. G Hartleb vs A Bisguier |
| 0-1 | 30 | 1958 | 59th US Open | D22 Queen's Gambit Accepted |
| 56. O Popovych vs G Hartleb |
| 1-0 | 19 | 1958 | 59th US Open | C36 King's Gambit Accepted, Abbazia Defense |
| 57. G Hartleb vs G Madlener |
| 1-0 | 20 | 1958 | 59th US Open | E90 King's Indian |
| 58. E Macskasy vs G Hartleb |
| 1-0 | 43 | 1958 | 59th US Open | D62 Queen's Gambit Declined, Orthodox, Rubinstein Attack |
| 59. G Mauer vs G Hartleb |
| 1-0 | 22 | 1958 | 59th US Open | C36 King's Gambit Accepted, Abbazia Defense |
| 60. E McCormick vs G Hartleb |
| 0-1 | 33 | 1959 | 60th US Open | C27 Vienna Game |
| 61. G Hartleb vs C Brasket |
 | 0-1 | 22 | 1959 | 60th US Open | D97 Grunfeld, Russian |
| 62. G Hartleb vs K Burger |
| 0-1 | 39 | 1959 | 60th US Open | E56 Nimzo-Indian, 4.e3, Main line with 7...Nc6 |
| 63. R Sprague vs G Hartleb |
| 0-1 | 35 | 1959 | 60th US Open | C77 Ruy Lopez |
| 64. G Hartleb vs M Rohland |
| 1-0 | 47 | 1959 | 60th US Open | D07 Queen's Gambit Declined, Chigorin Defense |
| 65. R Ortega vs G Hartleb |
| 1-0 | 20 | 1959 | 60th US Open | C84 Ruy Lopez, Closed |
| 66. J O'Keefe vs G Hartleb |
| 1-0 | 18 | 1960 | 61st US Open | A22 English |
| 67. G Hartleb vs R Hoppe |
| 1-0 | 45 | 1961 | 62nd US Open | E90 King's Indian |
| 68. G Hunnex vs G Hartleb |
| 1-0 | 24 | 1961 | 62nd US Open | C77 Ruy Lopez |
| 69. G Hartleb vs I Spector |
| 1-0 | 35 | 1961 | 62nd US Open | E90 King's Indian |
| 70. J E Barry vs G Hartleb |
| 1-0 | 59 | 1961 | 62nd US Open | D60 Queen's Gambit Declined, Orthodox Defense |
| 71. G Hartleb vs E Aronson |
| ½-½ | 29 | 1961 | 62nd US Open | D98 Grunfeld, Russian |
| 72. G Hartleb vs K Bendit |
| 1-0 | 39 | 1961 | 62nd US Open | D32 Queen's Gambit Declined, Tarrasch |
Kibitzing
