| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. D Buytaert vs J Ditzler |
| 1-0 | 65 | 1974 | Winterthur Juniors | B29 Sicilian, Nimzovich-Rubinstein |
| 2. M Ruefenacht vs J Ditzler |
| 1-0 | 43 | 1974 | Winterthur Juniors | B29 Sicilian, Nimzovich-Rubinstein |
| 3. J Ditzler vs J Ost-Hansen |
| ½-½ | 68 | 1974 | Winterthur Juniors | B43 Sicilian, Kan, 5.Nc3 |
| 4. D Mammola vs J Ditzler |
| ½-½ | 41 | 1974 | Winterthur Juniors | B09 Pirc, Austrian Attack |
| 5. A Herzog vs J Ditzler |
| 1-0 | 23 | 1974 | Winterthur Juniors | B29 Sicilian, Nimzovich-Rubinstein |
| 6. J Ditzler vs K Loken |
| 1-0 | 47 | 1974 | Winterthur Juniors | B42 Sicilian, Kan |
| 7. J Ditzler vs R Bellin |
| 0-1 | 49 | 1974 | Winterthur Juniors | B92 Sicilian, Najdorf, Opocensky Variation |
| 8. H Schoch vs J Ditzler |
| 0-1 | 49 | 1974 | Winterthur Juniors | B29 Sicilian, Nimzovich-Rubinstein |
| 9. J Ditzler vs K Podzielny |
| 0-1 | 32 | 1974 | Winterthur Juniors | B06 Robatsch |
| 10. J Ditzler vs B Carlier |
| 1-0 | 41 | 1974 | Winterthur Juniors | B06 Robatsch |
| 11. S Bailloux vs J Ditzler |
| 0-1 | 56 | 1974 | Winterthur Juniors | B09 Pirc, Austrian Attack |
| 12. J Ditzler vs G Welling |
| 0-1 | 25 | 1986 | Lugano Open | A33 English, Symmetrical |
| 13. J Ditzler vs I Nemet |
| 0-1 | 52 | 1987 | Geneva Open | E82 King's Indian, Samisch, double Fianchetto Variation |
| 14. U Schulze vs J Ditzler |
| 1-0 | 41 | 1989 | Bern Open | A04 Reti Opening |
| 15. J Von Hartlieb vs J Ditzler |
| ½-½ | 11 | 1989 | Bern Open | A04 Reti Opening |
| 16. O Svendsen vs J Ditzler |
| 0-1 | 22 | 1989 | Bern Open | B06 Robatsch |
| 17. A Huss vs J Ditzler |
| 0-1 | 34 | 1989 | Bern Open | A40 Queen's Pawn Game |
| 18. J Ditzler vs E Fatzer |
| 1-0 | 53 | 1989 | Bern Open | D11 Queen's Gambit Declined Slav |
| 19. J Ditzler vs Gheorghiu |
| ½-½ | 30 | 1989 | Bern Open | A37 English, Symmetrical |
| 20. J Ditzler vs V Bliumberg |
| 1-0 | 35 | 1989 | Bern Open | E87 King's Indian, Samisch, Orthodox |
| 21. J Ditzler vs G Barbero |
| 0-1 | 52 | 1989 | Bern Open | E11 Bogo-Indian Defense |
| 22. J Ditzler vs Petursson |
| 0-1 | 37 | 1989 | Lugano Open | E11 Bogo-Indian Defense |
| 23. J Ditzler vs Joel Coste |
| 1-0 | 33 | 1990 | Bern Open | E60 King's Indian Defense |
| 24. S Savchenko vs J Ditzler |
| 1-0 | 19 | 1993 | Bern Open | A42 Modern Defense, Averbakh System |
| 25. F Handke vs J Ditzler |
| 1-0 | 36 | 2000 | Biel MTO Open | B06 Robatsch |
Kibitzing
