| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. G Katz vs G Hartleb |
| 1-0 | 41 | 1946 | 47th US Open | D69 Queen's Gambit Declined, Orthodox Defense, Classical, 13.de |
| 2. G Hartleb vs R Byrne |
 | 0-1 | 20 | 1946 | 47th US Open | A53 Old Indian |
| 3. F Yerhoff vs G Hartleb |
| 1-0 | 35 | 1946 | 47th US Open | C22 Center Game |
| 4. A Mengarini vs G Hartleb |
 | 1-0 | 36 | 1948 | 49th US Open | C50 Giuoco Piano |
| 5. Evans vs G Hartleb |
| 1-0 | 46 | 1948 | 49th US Open | C84 Ruy Lopez, Closed |
| 6. G Hartleb vs E Nash |
| 1-0 | 42 | 1948 | 49th US Open | E90 King's Indian |
| 7. P Le Cornu vs G Hartleb |
| ½-½ | 55 | 1948 | 49th US Open | D68 Queen's Gambit Declined, Orthodox Defense, Classical |
| 8. O Shapiro vs G Hartleb |
| 1-0 | 30 | 1948 | 49th US Open | C86 Ruy Lopez, Worrall Attack |
| 9. H Steiner vs G Hartleb |
| ½-½ | 50 | 1948 | 49th US Open | D60 Queen's Gambit Declined, Orthodox Defense |
| 10. G Hartleb vs L Isaacs |
| 1-0 | 29 | 1948 | 49th US Open | E33 Nimzo-Indian, Classical |
| 11. O Bain vs G Hartleb |
| 0-1 | 38 | 1948 | 49th US Open | D37 Queen's Gambit Declined |
| 12. G Hartleb vs D Ackerman |
| 1-0 | 34 | 1949 | 50th US Open | D81 Grunfeld, Russian Variation |
| 13. G Hartleb vs A Bisguier |
| ½-½ | 52 | 1949 | 50th US Open | D27 Queen's Gambit Accepted, Classical |
| 14. G Hartleb vs A Sandrin |
| ½-½ | 76 | 1949 | 50th US Open | E53 Nimzo-Indian, 4.e3 |
| 15. G Hartleb vs E McCormick |
| 1-0 | 42 | 1949 | 50th US Open | D19 Queen's Gambit Declined Slav, Dutch |
| 16. C Hesse vs G Hartleb |
| 0-1 | 58 | 1950 | 51st US Open | C90 Ruy Lopez, Closed |
| 17. G Hartleb vs C Brasket |
| ½-½ | 56 | 1950 | 51st US Open | D10 Queen's Gambit Declined Slav |
| 18. C A Renton vs G Hartleb |
| 0-1 | 44 | 1951 | 52nd US Open | D63 Queen's Gambit Declined, Orthodox Defense |
| 19. G Hartleb vs H Fajans |
| 0-1 | 36 | 1951 | 52nd US Open | D22 Queen's Gambit Accepted |
| 20. G Hartleb vs A Sandrin |
| 0-1 | 50 | 1951 | 52nd US Open | E39 Nimzo-Indian, Classical, Pirc Variation |
| 21. G Hartleb vs J Westbrock |
| ½-½ | 51 | 1951 | 52nd US Open | E21 Nimzo-Indian, Three Knights |
| 22. C F Tears vs G Hartleb |
| 1-0 | 50 | 1951 | 52nd US Open | C84 Ruy Lopez, Closed |
| 23. G Hartleb vs C Brasket |
| 0-1 | 20 | 1951 | 52nd US Open | E38 Nimzo-Indian, Classical, 4...c5 |
| 24. R Harrell vs G Hartleb |
| ½-½ | 60 | 1951 | 52nd US Open | C77 Ruy Lopez |
| 25. G Eastman vs G Hartleb |
| 1-0 | 41 | 1953 | 54th US Open | C84 Ruy Lopez, Closed |
Kibitzing
