| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. J Kozma vs K Urbanec |
| ½-½ | 27 |
1954 |
CSR-ch | E56 Nimzo-Indian, 4.e3, Main line with 7...Nc6 |
| 2. J Kozma vs J Vesely |
| 1-0 | 42 |
1955 |
CSR-ch | E59 Nimzo-Indian, 4.e3, Main line |
| 3. J Kozma vs Filip |
| 1-0 | 23 |
1955 |
CSR-ch Army | E41 Nimzo-Indian |
| 4. J Kozma vs Szabo |
| ½-½ | 57 |
1955 |
Prague tm | E53 Nimzo-Indian, 4.e3 |
| 5. J Kozma vs H Lax |
| 1-0 | 29 |
1956 |
CSR-ch sf | E59 Nimzo-Indian, 4.e3, Main line |
| 6. J Kozma vs Z Necesany |
| 1-0 | 41 |
1956 |
CSR-ch sf | E44 Nimzo-Indian, Fischer Variation, 5.Ne2 |
| 7. J Kozma vs P Trifunovic |
| ½-½ | 24 |
1957 |
EU-chT (Men) | E56 Nimzo-Indian, 4.e3, Main line with 7...Nc6 |
| 8. J Kozma vs Minev |
| ½-½ | 35 |
1957 |
WchT U26 04th | E57 Nimzo-Indian, 4.e3, Main line with 8...dc and 9...cd |
| 9. J Kozma vs D Bertholdt |
| ½-½ | 41 |
1957 |
WchT U26 04th | E55 Nimzo-Indian, 4.e3, Gligoric System, Bronstein Variation |
| 10. J Kozma vs R A Redolfi |
| ½-½ | 21 |
1958 |
Munich ol (Men) fin-A | E59 Nimzo-Indian, 4.e3, Main line |
| 11. J Kozma vs G Braun |
| 1-0 | 43 |
1958 |
Kienbaum | E51 Nimzo-Indian, 4.e3 |
| 12. J Kozma vs F Blatny |
| 1-0 | 43 |
1959 |
Marianske Lazne | E43 Nimzo-Indian, Fischer Variation |
| 13. J Kozma vs J Rejfir |
| ½-½ | 42 |
1960 |
CSR-ch | E29 Nimzo-Indian, Samisch |
| 14. J Kozma vs C Papapostolou |
| 1-0 | 24 |
1960 |
Leipzig ol (Men) qual-C | E59 Nimzo-Indian, 4.e3, Main line |
| 15. J Kozma vs Ben Cheik |
| 1-0 | 46 |
1960 |
Leipzig ol (Men) qual-C | E52 Nimzo-Indian, 4.e3, Main line with ...b6 |
| 16. J Kozma vs D Drimer |
| ½-½ | 18 |
1962 |
Bucharest | E44 Nimzo-Indian, Fischer Variation, 5.Ne2 |
| 17. J Kozma vs Kholmov |
| ½-½ | 13 |
1962 |
Bucharest | E54 Nimzo-Indian, 4.e3, Gligoric System |
| 18. J Kozma vs J Trapl |
| 1-0 | 34 |
1963 |
CSR-ch | E48 Nimzo-Indian, 4.e3 O-O 5.Bd3 d5 |
| 19. J Kozma vs Kholmov |
| ½-½ | 17 |
1963 |
Sochi | E55 Nimzo-Indian, 4.e3, Gligoric System, Bronstein Variation |
| 20. J Kozma vs Krogius |
| ½-½ | 24 |
1963 |
Sochi | E56 Nimzo-Indian, 4.e3, Main line with 7...Nc6 |
| 21. J Kozma vs Filip |
| 0-1 | 40 |
1963 |
CSR-ch | E53 Nimzo-Indian, 4.e3 |
| 22. J Kozma vs Hybl |
| ½-½ | 41 |
1963 |
CSR-ch | E54 Nimzo-Indian, 4.e3, Gligoric System |
| 23. J Kozma vs Gipslis |
| ½-½ | 30 |
1964 |
Pecs | E55 Nimzo-Indian, 4.e3, Gligoric System, Bronstein Variation |
| 24. J Kozma vs M Damjanovic |
| 1-0 | 38 |
1964 |
Pecs | E59 Nimzo-Indian, 4.e3, Main line |
| 25. J Kozma vs Kovacs |
| 1-0 | 29 |
1967 |
Debrecen | E55 Nimzo-Indian, 4.e3, Gligoric System, Bronstein Variation |