| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. C Koch vs P Dijkstra |
 | 1-0 | 50 | 1990 | WT/M/GT/275 | C18 French, Winawer |
| 2. C Koch vs J A S Goncalves |
| 0-1 | 54 | 1990 | WT/M/GT/275 | C18 French, Winawer |
| 3. T Schmidt vs C Koch |
| ½-½ | 37 | 1990 | WT/M/GT/275 | A52 Budapest Gambit |
| 4. A Walczak vs C Koch |
| ½-½ | 44 | 1990 | WT/M/GT/275 | A18 English, Mikenas-Carls |
| 5. M P Shchebenyuk vs C Koch |
| ½-½ | 22 | 1990 | WT/M/GT/275 | B33 Sicilian |
| 6. E G Davies vs C Koch |
| 1-0 | 29 | 1990 | WT/M/GT/275 | E14 Queen's Indian |
| 7. C Koch vs R Hartmann |
| ½-½ | 29 | 1996 | CM..0.00018 | B76 Sicilian, Dragon, Yugoslav Attack |
| 8. T Winkler vs C Koch |
| ½-½ | 19 | 1996 | CM..0.00018 | D02 Queen's Pawn Game |
| 9. M Tarmak vs C Koch |
| ½-½ | 27 | 1996 | CM..0.00018 | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 10. C Koch vs O Vodep |
| 1-0 | 49 | 1996 | CM..0.00018 | C56 Two Knights |
| 11. C Koch vs W Braakhuis |
| ½-½ | 18 | 1996 | CM..0.00018 | C42 Petrov Defense |
| 12. B Hallengren vs C Koch |
| ½-½ | 20 | 1996 | CM..0.00018 | B81 Sicilian, Scheveningen, Keres Attack |
| 13. B G Whyte vs C Koch |
| 0-1 | 30 | 1996 | CM..0.00017 | B33 Sicilian |
| 14. R Sasata vs C Koch |
| 0-1 | 19 | 1996 | CM..0.00017 | E15 Queen's Indian |
| 15. I Peddie vs C Koch |
| 0-1 | 48 | 1996 | CM..0.00017 | D24 Queen's Gambit Accepted |
| 16. C Koch vs H Pahlen |
| 1-0 | 33 | 1996 | CM..0.00017 | B33 Sicilian |
| 17. C Koch vs J A S Goncalves |
| ½-½ | 48 | 1996 | CM..0.00017 | C69 Ruy Lopez, Exchange, Gligoric Variation |
| 18. G Noakes vs C Koch |
| 0-1 | 35 | 1996 | CM..0.00011 | B33 Sicilian |
| 19. K Neven vs C Koch |
| ½-½ | 23 | 1996 | CM..0.00011 | B33 Sicilian |
| 20. C Koch vs A Wolff |
| ½-½ | 22 | 1996 | CM..0.00011 | B18 Caro-Kann, Classical |
| 21. C Koch vs T Winkler |
| ½-½ | 24 | 1996 | CM..0.00011 | B63 Sicilian, Richter-Rauzer Attack |
| 22. C Koch vs G Albarran |
| ½-½ | 27 | 1996 | CM..0.00011 | B46 Sicilian, Taimanov Variation |
| 23. G Borg vs C Koch |
| 1-0 | 43 | 1996 | CM..0.00011 | D34 Queen's Gambit Declined, Tarrasch |
| 24. C Koch vs A Valverde Toresano |
| 1-0 | 18 | 1996 | CM..0.00017 | C63 Ruy Lopez, Schliemann Defense |
| 25. D R Smith vs C Koch |
| 0-1 | 34 | 1997 | CM..0.00019 | A00 Uncommon Opening |
Kibitzing
