| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. N Weinstein vs G DeFotis |
| ½-½ | 33 | 1968 | USA Junior Invitational Championship | B90 Sicilian, Najdorf |
| 2. G DeFotis vs A Deutsch |
| 1-0 | 23 | 1968 | USA Junior Invitational Championship | A56 Benoni Defense |
| 3. G DeFotis vs E Winslow |
| 1-0 | 43 | 1968 | 69th US Open | E72 King's Indian |
| 4. J Westbrock vs G DeFotis |
| 0-1 | 42 | 1968 | 69th US Open | E76 King's Indian, Four Pawns Attack |
| 5. G DeFotis vs A Saidy |
| 1-0 | 43 | 1968 | 69th US Open | A79 Benoni, Classical, 11.f3 |
| 6. Benko vs G DeFotis |
| 1-0 | 37 | 1968 | 69th US Open | E90 King's Indian |
| 7. R Mills vs G DeFotis |
| ½-½ | 18 | 1968 | 69th US Open | A07 King's Indian Attack |
| 8. G DeFotis vs J Hechtlinger |
| 1-0 | 46 | 1968 | 69th US Open | B17 Caro-Kann, Steinitz Variation |
| 9. K Burger vs G DeFotis |
| 0-1 | 58 | 1968 | 69th US Open | A26 English |
| 10. G DeFotis vs Browne |
| ½-½ | 28 | 1968 | 69th US Open | D35 Queen's Gambit Declined |
| 11. Larsen vs G DeFotis |
| 1-0 | 34 | 1968 | 69th US Open | B21 Sicilian, 2.f4 and 2.d4 |
| 12. G DeFotis vs E Nash |
| 1-0 | 46 | 1968 | 69th US Open | E20 Nimzo-Indian |
| 13. A Malachi vs G DeFotis |
| ½-½ | 34 | 1969 | World Student Team Championship qual-3 | B98 Sicilian, Najdorf |
| 14. G DeFotis vs W Hartston |
| ½-½ | 17 | 1969 | World Student Team Championship qual-3 | D78 Neo-Grunfeld, 6.O-O c6 |
| 15. G DeFotis vs P Votruba |
| 1-0 | 40 | 1969 | World Student Team Championship Final-A | E54 Nimzo-Indian, 4.e3, Gligoric System |
| 16. J Dueball vs G DeFotis |
| ½-½ | 26 | 1969 | World Student Team Championship Final-A | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 17. R Postler vs G DeFotis |
| ½-½ | 33 | 1969 | World Student Team Championship Final-A | B23 Sicilian, Closed |
| 18. M Despotovic vs G DeFotis |
| 1-0 | 40 | 1969 | World Student Team Championship Final-A | A58 Benko Gambit |
| 19. G DeFotis vs D Wright |
| 1-0 | 37 | 1969 | World Student Team Championship Final-A | A10 English |
| 20. G DeFotis vs T Georgadze |
| 0-1 | 72 | 1969 | World Student Team Championship Final-A | A30 English, Symmetrical |
| 21. J Kent vs G DeFotis |
| 0-1 | 24 | 1971 | USA | A88 Dutch, Leningrad, Main Variation with c6 |
| 22. H Tobin vs G DeFotis |
| 0-1 | 20 | 1971 | 72nd US Open | B87 Sicilian, Fischer-Sozin with ...a6 and ...b5 |
| 23. G DeFotis vs R G Myers |
| 1-0 | 25 | 1971 | 72nd US Open | A07 King's Indian Attack |
| 24. D Presser vs G DeFotis |
| 0-1 | 46 | 1971 | 72nd US Open | B23 Sicilian, Closed |
| 25. G DeFotis vs Reshevsky |
| ½-½ | 19 | 1971 | 72nd US Open | E64 King's Indian, Fianchetto, Yugoslav System |
Kibitzing
