Game |
| Result | Moves |
Year | Event/Locale | Opening |
1. G Kosztolanczi vs P Freisler |
| 1-0 | 26 | 1987 | Hungarian Open Championship | B09 Pirc, Austrian Attack |
2. G Kosztolanczi vs L Bencze |
| 1-0 | 32 | 1987 | Hungarian Open Championship | C05 French, Tarrasch |
3. C Horvath vs G Kosztolanczi |
| ½-½ | 48 | 1987 | Hungarian Open Championship | B33 Sicilian |
4. A Butnorius vs G Kosztolanczi |
| 1-0 | 71 | 1987 | Hungarian Open Championship | E97 King's Indian |
5. U Boensch vs G Kosztolanczi |
| 1-0 | 40 | 1987 | Hungarian Open Championship | E97 King's Indian |
6. G Kosztolanczi vs S Cvetkovic |
| 0-1 | 35 | 1987 | Hungarian Open Championship | B87 Sicilian, Fischer-Sozin with ...a6 and ...b5 |
7. G Kosztolanczi vs P Kiss |
| 1-0 | 32 | 1987 | Hungarian Open Championship | B32 Sicilian |
8. G Kosztolanczi vs J Szigeti |
| 1-0 | 34 | 1988 | Zalakaros Open | C69 Ruy Lopez, Exchange, Gligoric Variation |
9. G Kosztolanczi vs L Barczay |
| 0-1 | 33 | 1988 | Zalakaros Open | B40 Sicilian |
10. L Deak vs G Kosztolanczi |
| 1-0 | 27 | 1988 | Zalakaros Open | E60 King's Indian Defense |
11. B Radnoti vs G Kosztolanczi |
| 1-0 | 29 | 1991 | HUN-chT | A48 King's Indian |
12. G Kallai vs G Kosztolanczi |
| 1-0 | 23 | 1991 | HUN-chT | E75 King's Indian, Averbakh, Main line |
13. G Kosztolanczi vs P Kiss |
| 0-1 | 36 | 1992 | HUN-chT | A07 King's Indian Attack |
14. L Zsinka vs G Kosztolanczi |
| 1-0 | 41 | 1994 | Balatonbereny | E87 King's Indian, Samisch, Orthodox |
15. A Kiss vs G Kosztolanczi |
| 0-1 | 60 | 1995 | Veszprem SZT op | E61 King's Indian |
16. G Kosztolanczi vs A Kiss |
| 0-1 | 27 | 1996 | Veszprem op | B01 Scandinavian |
17. H Hagermann vs G Kosztolanczi |
| 0-1 | 26 | 1996 | Pecs Open | B30 Sicilian |
18. G Kosztolanczi vs R Petkovic |
| 0-1 | 28 | 1996 | Pecs Open | C11 French |
19. G Kosztolanczi vs O Kozlova |
| 0-1 | 20 | 1996 | Pecs Open | C69 Ruy Lopez, Exchange, Gligoric Variation |
20. G Kosztolanczi vs S Horvath |
| ½-½ | 53 | 1997 | Hungarian Team Championship 1997/98 | B33 Sicilian |
21. G Kosztolanczi vs A Bagonyai |
| ½-½ | 11 | 1997 | Hungarian Team Championship 1997/98 | B32 Sicilian |
22. S Farago vs G Kosztolanczi |
| 1-0 | 46 | 1997 | Hungarian Team Championship 1997/98 | B32 Sicilian |
23. J Dory vs G Kosztolanczi |
| 1-0 | 66 | 1997 | Hungarian Team Championship 1997/98 | B22 Sicilian, Alapin |
24. I Poor vs G Kosztolanczi |
| 1-0 | 39 | 1998 | Hungarian Team Championship 1997/98 | A05 Reti Opening |
25. G Kosztolanczi vs L Seres |
| 0-1 | 20 | 1998 | Hungarian Team Championship 1997/98 | B32 Sicilian |