| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Hebden vs A Kosten |
| 1-0 | 59 |
1983 |
Southport ch70-BCF | B83 Sicilian |
| 2. Kupreichik vs A Kosten |
| 1-0 | 36 |
1987 |
West Berlin 44/228 (Kupreichik,V) | B56 Sicilian |
| 3. Hort vs A Kosten |
| 0-1 | 31 |
1987 |
Geneva | B90 Sicilian, Najdorf |
| 4. Adams vs A Kosten |
| 1-0 | 53 |
1988 |
London NWYM | B56 Sicilian |
| 5. Kudrin vs A Kosten |
| 1-0 | 50 |
1988 |
It (open) | B56 Sicilian |
| 6. B Perenyi vs A Kosten |
| 0-1 | 60 |
1988 |
Compack | B56 Sicilian |
| 7. Suetin vs A Kosten |
| 0-1 | 60 |
1989 |
It (open) | B31 Sicilian, Rossolimo Variation |
| 8. Speelman vs A Kosten |
| 1-0 | 45 |
1989 |
London (England) | B39 Sicilian, Accelerated Fianchetto, Breyer Variation |
| 9. Chandler vs A Kosten |
 | 1-0 | 61 |
1989 |
It (cat.14) | B62 Sicilian, Richter-Rauzer |
| 10. Adams vs A Kosten |
| ½-½ | 19 |
1989 |
Paris op-1 | B45 Sicilian, Taimanov |
| 11. D Gormally vs A Kosten |
| ½-½ | 47 |
1999 |
Ch Great Britain, Scarborough (England) | B87 Sicilian, Fischer-Sozin with ...a6 and ...b5 |
| 12. M Heidenfeld vs A Kosten |
| ½-½ | 39 |
1999 |
Ch Great Britain, Scarborough (England) | B90 Sicilian, Najdorf |
| 13. D Ledger vs A Kosten |
| 1-0 | 36 |
1999 |
Ch Great Britain, Scarborough (England) | B24 Sicilian, Closed |
| 14. D Gormally vs A Kosten |
| ½-½ | 47 |
2000 |
4NCL | B96 Sicilian, Najdorf |
| 15. A Ledger vs A Kosten |
 | 0-1 | 43 |
2001 |
4NCL | B26 Sicilian, Closed, 6.Be3 |
| 16. S Bromberger vs A Kosten |
| 1-0 | 42 |
2003 |
TCh-AUT 2002-3 | B96 Sicilian, Najdorf |
| 17. M Abdel Fadil vs A Kosten |
| 0-1 | 57 |
2003 |
Golden Cleopatra | B96 Sicilian, Najdorf |
| 18. A Kveinys vs A Kosten |
| ½-½ | 39 |
2003 |
1st Misr Closed, Cairo EGY | B93 Sicilian, Najdorf, 6.f4 |
| 19. M Bijaoui vs A Kosten |
| ½-½ | 47 |
2004 |
TCh-FRA Nat1 GpB | B96 Sicilian, Najdorf |
| 20. C Marchadour vs A Kosten |
| 0-1 | 34 |
2005 |
French Team championship 'TOP 16' | B90 Sicilian, Najdorf |
| 21. M Apicella vs A Kosten |
| ½-½ | 50 |
2005 |
Saint Affrique Open | B90 Sicilian, Najdorf |
| 22. A Sokolov vs A Kosten |
 | 1-0 | 60 |
2005 |
French Championship | B90 Sicilian, Najdorf |
| 23. P Makepeace vs A Kosten |
| 0-1 | 71 |
2007 |
British Championship | B90 Sicilian, Najdorf |