| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. G Szilagyi vs J Flesch |
 | 0-1 | 26 | 1955 | Budapest | D43 Queen's Gambit Declined Semi-Slav |
| 2. T Florian vs J Flesch |
| 1-0 | 51 | 1958 | 14th Hungarian Championship | E17 Queen's Indian |
| 3. Szabo vs J Flesch |
| ½-½ | 48 | 1958 | 14th Hungarian Championship | D46 Queen's Gambit Declined Semi-Slav |
| 4. J Flesch vs J Pogats |
| ½-½ | 12 | 1958 | 14th Hungarian Championship | E09 Catalan, Closed |
| 5. J Flesch vs R Sallay |
| 0-1 | 55 | 1958 | 14th Hungarian Championship | E98 King's Indian, Orthodox, Taimanov, 9.Ne1 |
| 6. J Flesch vs L Barczay |
| 1-0 | 21 | 1958 | 14th Hungarian Championship | A36 English |
| 7. J Flesch vs I Bilek |
| ½-½ | 33 | 1958 | 14th Hungarian Championship | A07 King's Indian Attack |
| 8. B Sandor vs J Flesch |
| 0-1 | 62 | 1958 | 14th Hungarian Championship | E95 King's Indian, Orthodox, 7...Nbd7, 8.Re1 |
| 9. E Varnusz vs J Flesch |
| 1-0 | 29 | 1958 | 14th Hungarian Championship | D43 Queen's Gambit Declined Semi-Slav |
| 10. E Haag vs J Flesch |
| 1-0 | 38 | 1958 | 14th Hungarian Championship | B10 Caro-Kann |
| 11. J Flesch vs K Honfi |
| 0-1 | 57 | 1958 | 14th Hungarian Championship | D97 Grunfeld, Russian |
| 12. T Filep vs J Flesch |
| 0-1 | 59 | 1958 | 14th Hungarian Championship | A89 Dutch, Leningrad, Main Variation with Nc6 |
| 13. J Flesch vs Forintos |
| ½-½ | 70 | 1958 | 14th Hungarian Championship | A92 Dutch |
| 14. Portisch vs J Flesch |
| 1-0 | 34 | 1958 | 14th Hungarian Championship | A17 English |
| 15. Lengyel vs J Flesch |
| ½-½ | 62 | 1958 | 14th Hungarian Championship | A12 English with b3 |
| 16. Barcza vs J Flesch |
| 1-0 | 77 | 1958 | 14th Hungarian Championship | A05 Reti Opening |
| 17. J Flesch vs P Dely |
| 0-1 | 48 | 1958 | 14th Hungarian Championship | B16 Caro-Kann, Bronstein-Larsen Variation |
| 18. J Flesch vs G Kluger |
| 0-1 | 39 | 1958 | 14th Hungarian Championship | A86 Dutch |
| 19. J Flesch vs Hrumo |
| 1-0 | 14 | 1960 | Blindfold simul, 52b | C37 King's Gambit Accepted |
| 20. J Flesch vs Csizmarik |
| 1-0 | 18 | 1960 | Blindfold simul, 52b | C56 Two Knights |
| 21. J Flesch vs G Kluger |
| ½-½ | 45 | 1961 | Hungarian Championship | A62 Benoni, Fianchetto Variation |
| 22. Barcza vs J Flesch |
| ½-½ | 45 | 1961 | Hungarian Championship | A54 Old Indian, Ukrainian Variation, 4.Nf3 |
| 23. J Flesch vs E Orendy |
| 0-1 | 54 | 1961 | Hungarian Championship | A53 Old Indian |
| 24. Lengyel vs J Flesch |
| 1-0 | 45 | 1961 | Hungarian Championship | D11 Queen's Gambit Declined Slav |
| 25. J Flesch vs Szabo |
| ½-½ | 41 | 1961 | Hungarian Championship | A49 King's Indian, Fianchetto without c4 |
Kibitzing
