| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. J Asselin vs J Grefe |
| 0-1 | 26 | 1969 | 70th US Open | B06 Robatsch |
| 2. L Williams vs J Grefe |
 | 0-1 | 23 | 1969 | 70th US Open | A01 Nimzovich-Larsen Attack |
| 3. J Grefe vs D Presser |
| 1-0 | 59 | 1969 | 70th US Open | B28 Sicilian, O'Kelly Variation |
| 4. K Fitzgerald vs J Grefe |
| 0-1 | 25 | 1969 | 70th US Open | A07 King's Indian Attack |
| 5. J Grefe vs O Popovych |
| 0-1 | 32 | 1969 | 70th US Open | B94 Sicilian, Najdorf |
| 6. J Grefe vs E Pruner |
| ½-½ | 23 | 1969 | 70th US Open | B42 Sicilian, Kan |
| 7. J Dunning vs J Grefe |
| 0-1 | 26 | 1969 | 70th US Open | A41 Queen's Pawn Game (with ...d6) |
| 8. S Matera vs J Grefe |
| ½-½ | 30 | 1969 | 70th US Open | B06 Robatsch |
| 9. J Grefe vs W Shipman |
| 0-1 | 52 | 1969 | 70th US Open | C60 Ruy Lopez |
| 10. J L Watson vs J Grefe |
| 0-1 | 40 | 1969 | 70th US Open | B06 Robatsch |
| 11. A Saidy vs J Grefe |
| 1-0 | 29 | 1970 | 3rd Continental Open | E66 King's Indian, Fianchetto, Yugoslav Panno |
| 12. R Byrne vs J Grefe |
| 1-0 | 37 | 1970 | 6th American Open | B90 Sicilian, Najdorf |
| 13. J Grefe vs J Tarjan |
| 1-0 | 30 | 1971 | National Open | C73 Ruy Lopez, Modern Steinitz Defense |
| 14. J Grefe vs S Rubin |
| 1-0 | 28 | 1971 | Lone Pine | A07 King's Indian Attack |
| 15. J Loftsson vs J Grefe |
| 0-1 | 31 | 1971 | Lone Pine | A56 Benoni Defense |
| 16. J Grefe vs A Karklins |
| 1-0 | 25 | 1971 | Lone Pine | A00 Uncommon Opening |
| 17. D Fritzinger vs J Grefe |
| 1-0 | 52 | 1972 | 8th American Open | A00 Uncommon Opening |
| 18. J Grefe vs N Weinstein |
| 0-1 | 34 | 1973 | USA op | A01 Nimzovich-Larsen Attack |
| 19. A Kevitz vs J Grefe |
| 0-1 | 40 | 1973 | 1st World Open | A04 Reti Opening |
| 20. P Brandts vs J Grefe |
| 0-1 | 47 | 1973 | Lone Pine | A56 Benoni Defense |
| 21. J Grefe vs R Ervin |
| 1-0 | 46 | 1973 | Lone Pine | C12 French, McCutcheon |
| 22. Evans vs J Grefe |
| 0-1 | 35 | 1973 | Lone Pine | A10 English |
| 23. J Grefe vs A Karklins |
| 1-0 | 30 | 1973 | US Championship | C69 Ruy Lopez, Exchange, Gligoric Variation |
| 24. G F Kane vs J Grefe |
| ½-½ | 40 | 1973 | US Championship | A56 Benoni Defense |
| 25. J Grefe vs L Gilden |
| 1-0 | 25 | 1973 | US Championship | B97 Sicilian, Najdorf |
Kibitzing
