| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Gerhard Schmidt vs Schmittdiel |
| ½-½ | 36 |
1981 |
NRW-ch | C14 French, Classical |
| 2. R Lau vs Schmittdiel |
| 1-0 | 29 |
1981 |
NRW-ch | D11 Queen's Gambit Declined Slav |
| 3. M Mudersbach vs Schmittdiel |
| 0-1 | 43 |
1981 |
NRW-ch | A17 English |
| 4. Schmittdiel vs S Ingenerf |
| 1-0 | 47 |
1981 |
NRW-ch | B06 Robatsch |
| 5. Schmittdiel vs W Groenegress |
| ½-½ | 11 |
1981 |
NRW-ch | B42 Sicilian, Kan |
| 6. Schmittdiel vs A Weiermann |
| ½-½ | 17 |
1981 |
NRW-ch | B07 Pirc |
| 7. Schmittdiel vs U Markmann |
| ½-½ | 23 |
1981 |
NRW-ch | B33 Sicilian |
| 8. Schmittdiel vs W Beckemeier |
| ½-½ | 31 |
1981 |
NRW-ch | B92 Sicilian, Najdorf, Opocensky Variation |
| 9. P Gruen vs Schmittdiel |
| 1-0 | 46 |
1981 |
NRW-ch | E18 Queen's Indian, Old Main line, 7.Nc3 |
| 10. K Spraggett vs Schmittdiel |
| 1-0 | 52 |
1984 |
Dortmund | A17 English |
| 11. Schmittdiel vs Adorjan |
| 0-1 | 43 |
1984 |
Dortmund (Germany) | B81 Sicilian, Scheveningen, Keres Attack |
| 12. Schmittdiel vs Suba |
| ½-½ | 47 |
1984 |
Dortmund | B90 Sicilian, Najdorf |
| 13. V Tukmakov vs Schmittdiel |
| ½-½ | 64 |
1985 |
Lugano op | A61 Benoni |
| 14. Nunn vs Schmittdiel |
| 1-0 | 31 |
1987 |
Dortmund-A | C11 French |
| 15. Schmittdiel vs V Tukmakov |
| 0-1 | 41 |
1987 |
Dortmund-A | C61 Ruy Lopez, Bird's Defense |
| 16. Balashov vs Schmittdiel |
| 1-0 | 42 |
1987 |
Dortmund-A | B23 Sicilian, Closed |
| 17. Schmittdiel vs Ulf Andersson |
 | 0-1 | 32 |
1987 |
It (a), Dortmund (Germany) | B22 Sicilian, Alapin |
| 18. Zsofia Polgar vs Schmittdiel |
| 1-0 | 39 |
1988 |
It (open), Royan (France) | B33 Sicilian |
| 19. J Lechtynsky vs Schmittdiel |
| ½-½ | 48 |
1988 |
Augsburg | A15 English |
| 20. W Schmidt vs Schmittdiel |
| 1-0 | 33 |
1988 |
Dortmund-B | A14 English |
| 21. Christiansen vs Schmittdiel |
| 0-1 | 79 |
1988 |
Bad Mergentheim GER op | A46 Queen's Pawn Game |
| 22. Hertneck vs Schmittdiel |
| ½-½ | 64 |
1988 |
Augsburg | B33 Sicilian |
| 23. Petursson vs Schmittdiel |
| 1-0 | 42 |
1988 |
Gausdal/SW,34,9 | E11 Bogo-Indian Defense |
| 24. Hort vs Schmittdiel |
| ½-½ | 22 |
1989 |
Bad Neuenahr | E20 Nimzo-Indian |
| 25. Kotronias vs Schmittdiel |
| 1-0 | 19 |
1989 |
Dortmund-A | B33 Sicilian |