| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. I Bern vs D Kosic |
| 0-1 | 29 | 1987 | European Junior Championship 1987/88 | D30 Queen's Gambit Declined |
| 2. D Kosic vs P Vandevoort |
| 1-0 | 59 | 1987 | European Junior Championship 1987/88 | D35 Queen's Gambit Declined |
| 3. E Fernandez Aguado vs D Kosic |
| 1-0 | 56 | 1987 | European Junior Championship 1987/88 | B81 Sicilian, Scheveningen, Keres Attack |
| 4. D Kosic vs A Pieniazek |
| 0-1 | 30 | 1987 | European Junior Championship 1987/88 | E15 Queen's Indian |
| 5. R Wessman vs D Kosic |
| 0-1 | 42 | 1987 | European Junior Championship 1987/88 | D10 Queen's Gambit Declined Slav |
| 6. D Kosic vs R Damaso |
| 1-0 | 56 | 1987 | European Junior Championship 1987/88 | E94 King's Indian, Orthodox |
| 7. L Langner vs D Kosic |
| 1-0 | 40 | 1987 | European Junior Championship 1987/88 | C02 French, Advance |
| 8. T Thorhallsson vs D Kosic |
| 0-1 | 24 | 1987 | European Junior Championship 1987/88 | B80 Sicilian, Scheveningen |
| 9. D Kosic vs Ivanchuk |
| ½-½ | 41 | 1987 | European Junior Championship 1987/88 | A61 Benoni |
| 10. D Kosic vs L B Hansen |
| 1-0 | 54 | 1987 | European Junior Championship 1987/88 | A58 Benko Gambit |
| 11. Gelfand vs D Kosic |
| 1-0 | 63 | 1987 | European Junior Championship 1987/88 | D10 Queen's Gambit Declined Slav |
| 12. D Kosic vs J Gdanski |
| 0-1 | 33 | 1987 | European Junior Championship 1987/88 | A56 Benoni Defense |
| 13. D Kosic vs W Lin |
| 0-1 | 47 | 1988 | World Junior Championship | D97 Grunfeld, Russian |
| 14. L Riemersma vs D Kosic |
| ½-½ | 46 | 1988 | European Junior Championship 1987/88 | B81 Sicilian, Scheveningen, Keres Attack |
| 15. D Kosic vs M Saunders |
| 1-0 | 29 | 1988 | World Junior Championship | E94 King's Indian, Orthodox |
| 16. D Kosic vs Ivanchuk |
 | 0-1 | 48 | 1988 | World Junior Championship | E94 King's Indian, Orthodox |
| 17. E Hernandez Guerrero vs D Kosic |
| 0-1 | 35 | 1988 | World Junior Championship | B80 Sicilian, Scheveningen |
| 18. J M Capo Iturrieta vs D Kosic |
| ½-½ | 51 | 1988 | World Junior Championship | B81 Sicilian, Scheveningen, Keres Attack |
| 19. D Kosic vs I D MacKay |
| 0-1 | 41 | 1988 | World Junior Championship | A43 Old Benoni |
| 20. M Al-Modiahki vs D Kosic |
| 0-1 | 57 | 1988 | World Junior Championship | A07 King's Indian Attack |
| 21. J Gdanski vs D Kosic |
| ½-½ | 41 | 1988 | World Junior Championship | B86 Sicilian, Fischer-Sozin Attack |
| 22. D Kosic vs J Piket |
| 0-1 | 54 | 1988 | World Junior Championship | D45 Queen's Gambit Declined Semi-Slav |
| 23. D Kosic vs D Norwood |
| 1-0 | 19 | 1988 | World Junior Championship | A58 Benko Gambit |
| 24. Lautier vs D Kosic |
| 1-0 | 43 | 1988 | World Junior Championship | E91 King's Indian |
| 25. D Kosic vs Gelfand |
| 1-0 | 49 | 1988 | World Junior Championship | A56 Benoni Defense |
Kibitzing
