| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. P Dittmar vs S Mohr |
| 0-1 | 43 | 1985 | Wuerttemberg-ch | A48 King's Indian |
| 2. P Leisebein vs P Dittmar |
| ½-½ | 35 | 1988 | corres DDR/BRD | C36 King's Gambit Accepted, Abbazia Defense |
| 3. P Dittmar vs E Dizdarevic |
| ½-½ | 47 | 1988 | Bad Woerishofen Open | A46 Queen's Pawn Game |
| 4. Z Kormanyos vs P Dittmar |
| 1-0 | 24 | 1988 | Altensteig Open | D44 Queen's Gambit Declined Semi-Slav |
| 5. E Frolik vs P Dittmar |
| 1-0 | 66 | 1989 | Wuerttemberg-ch | C02 French, Advance |
| 6. P Dittmar vs L Espig |
| 0-1 | 31 | 1989 | Budapest Spring Open | A41 Queen's Pawn Game (with ...d6) |
| 7. Jansa vs P Dittmar |
| 1-0 | 32 | 1990 | BL2-S 8990 ;BL2 | C05 French, Tarrasch |
| 8. G Hertneck vs P Dittmar |
| 1-0 | 44 | 1990 | Badenweiler op | C02 French, Advance |
| 9. C Gabriel vs P Dittmar |
| 0-1 | 34 | 1990 | BL2-S 8990 | C05 French, Tarrasch |
| 10. P Dittmar vs J Bany |
| 0-1 | 26 | 1990 | Dortmund Open | A84 Dutch |
| 11. A Kochyev vs P Dittmar |
| 1-0 | 44 | 1990 | Dortmund Open | D12 Queen's Gambit Declined Slav |
| 12. W Schmidt vs P Dittmar |
| 1-0 | 28 | 1990 | Dortmund Open | D44 Queen's Gambit Declined Semi-Slav |
| 13. B Lengyel vs P Dittmar |
| 0-1 | 34 | 1990 | Dortmund Open | C18 French, Winawer |
| 14. P Dittmar vs B Modr |
| 1-0 | 45 | 1990 | Dortmund Open | D35 Queen's Gambit Declined |
| 15. P Dittmar vs I Horvath |
| 1-0 | 42 | 1990 | Dortmund Open | D10 Queen's Gambit Declined Slav |
| 16. P Buchholz vs P Dittmar |
| 0-1 | 42 | 1991 | Dortmund op | C05 French, Tarrasch |
| 17. W Schoen vs P Dittmar |
| ½-½ | 49 | 1991 | Dortmund op | A90 Dutch |
| 18. P Dittmar vs Adams |
| 0-1 | 27 | 1991 | Bad Wildbad IM | A10 English |
| 19. S Semina vs P Dittmar |
| 0-1 | 28 | 1991 | Dortmund op | C18 French, Winawer |
| 20. E Frolik vs P Dittmar |
| ½-½ | 46 | 1991 | Wuerttemberg-ch | A90 Dutch |
| 21. P Dittmar vs V M Vehi Bach |
| 0-1 | 44 | 1991 | Dortmund op | E30 Nimzo-Indian, Leningrad |
| 22. T Karolyi vs P Dittmar |
| 1-0 | 48 | 1991 | Dortmund op | A90 Dutch |
| 23. Barsov vs P Dittmar |
| ½-½ | 22 | 1991 | Kecskemet2 | A84 Dutch |
| 24. J Ellebracht vs P Dittmar |
| 0-1 | 44 | 1991 | Dortmund op | A00 Uncommon Opening |
| 25. S Galdunts vs P Dittmar |
| 1-0 | 38 | 1991 | Bad Wildbad IM | C02 French, Advance |
Kibitzing
