| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. J Flesch vs K Honfi |
| ½-½ | 21 | 1962 | Hungarian Championship | D78 Neo-Grunfeld, 6.O-O c6 |
| 2. J Flesch vs Barcza |
| ½-½ | 70 | 1964 | Reggio Emilia 1963/64 | D78 Neo-Grunfeld, 6.O-O c6 |
| 3. J Flesch vs H Kramer |
| ½-½ | 75 | 1964 | Hoogovens-B | D78 Neo-Grunfeld, 6.O-O c6 |
| 4. J Flesch vs K Honfi |
| 1-0 | 41 | 1964 | Hungarian Championship | D78 Neo-Grunfeld, 6.O-O c6 |
| 5. J Flesch vs R Sallay |
| 1-0 | 108 | 1964 | Hungarian Championship | D78 Neo-Grunfeld, 6.O-O c6 |
| 6. J Flesch vs K Honfi |
| 0-1 | 42 | 1964 | Asztalos Memorial | D78 Neo-Grunfeld, 6.O-O c6 |
| 7. J Flesch vs P Dely |
| ½-½ | 16 | 1964 | Asztalos Memorial | D78 Neo-Grunfeld, 6.O-O c6 |
| 8. J Flesch vs Gheorghiu |
| ½-½ | 20 | 1965 | Belgrade | D78 Neo-Grunfeld, 6.O-O c6 |
| 9. J Flesch vs M Ujtelky |
| 1-0 | 44 | 1967 | EU-chT preliminary | D78 Neo-Grunfeld, 6.O-O c6 |
| 10. J Flesch vs G Rajna |
| 0-1 | 37 | 1975 | Szolnok | D78 Neo-Grunfeld, 6.O-O c6 |
| 11. J Flesch vs R Hernandez Onna |
| ½-½ | 20 | 1975 | Szolnok | D78 Neo-Grunfeld, 6.O-O c6 |
| 12. J Flesch vs G Iskov |
| 1-0 | 26 | 1976 | Oslo Chess International | D78 Neo-Grunfeld, 6.O-O c6 |
Kibitzing
