| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 26. Schmittdiel vs Hort |
| ½-½ | 36 |
1989 |
Dortmund-A | B22 Sicilian, Alapin |
| 27. Schmittdiel vs Psakhis |
| 0-1 | 56 |
1989 |
Dortmund-A | C67 Ruy Lopez |
| 28. Schmittdiel vs Wojtkiewicz |
| 1-0 | 87 |
1989 |
team | B22 Sicilian, Alapin |
| 29. Schmittdiel vs Hort |
| ½-½ | 29 |
1989 |
Bad Neuenahr | C42 Petrov Defense |
| 30. Schmittdiel vs Tal |
| ½-½ | 50 |
1989 |
BLACK | B06 Robatsch |
| 31. Schmittdiel vs Portisch |
| 1-0 | 40 |
1989 |
Budapest | C19 French, Winawer, Advance |
| 32. Smejkal vs Schmittdiel |
| 1-0 | 35 |
1989 |
Bundesliga 8990 | D34 Queen's Gambit Declined, Tarrasch |
| 33. Hort vs Schmittdiel |
| ½-½ | 22 |
1989 |
Bad Neuenahr | E20 Nimzo-Indian |
| 34. Kotronias vs Schmittdiel |
| 1-0 | 19 |
1989 |
Dortmund-A | B33 Sicilian |
| 35. Jansa vs Schmittdiel |
| 1-0 | 37 |
1989 |
Gausdal | B33 Sicilian |
| 36. Geller vs Schmittdiel |
| 1-0 | 36 |
1989 |
Dortmund | B33 Sicilian |
| 37. Schmittdiel vs Hort |
| ½-½ | 33 |
1989 |
Tyskland | A06 Reti Opening |
| 38. Schmittdiel vs Psakhis |
| ½-½ | 26 |
1990 |
Groningen op | C69 Ruy Lopez, Exchange, Gligoric Variation, 6.d4 |
| 39. Spassky vs Schmittdiel |
| 0-1 | 38 |
1990 |
Bled/Rogaska | A46 Queen's Pawn Game |
| 40. Schmittdiel vs Zsofia Polgar |
| ½-½ | 27 |
1990 |
Dortmund (Germany) | B22 Sicilian, Alapin |
| 41. Jansa vs Schmittdiel |
| 1-0 | 39 |
1990 |
Gausdal Peer-Gynt | B33 Sicilian |
| 42. Schmittdiel vs Gipslis |
| ½-½ | 42 |
1990 |
Groningen (Netherlands) | B07 Pirc |
| 43. Hort vs Schmittdiel |
| ½-½ | 11 |
1990 |
BL 8990 ;BL | A46 Queen's Pawn Game |
| 44. Schmittdiel vs Judit Polgar |
 | 1-0 | 48 |
1990 |
Dortmund | B22 Sicilian, Alapin |
| 45. W Schmidt vs Schmittdiel |
| ½-½ | 24 |
1990 |
Bohemians | A04 Reti Opening |
| 46. P Haba vs Schmittdiel |
| ½-½ | 30 |
1990 |
Bohemians | B33 Sicilian |
| 47. Piket vs Schmittdiel |
| ½-½ | 21 |
1991 |
Groningen | A46 Queen's Pawn Game |
| 48. Schmittdiel vs Wojtkiewicz |
| ½-½ | 64 |
1991 |
Polanica | B07 Pirc |
| 49. Schmittdiel vs S Smagin |
| ½-½ | 30 |
1991 |
Dortmund-A | C85 Ruy Lopez, Exchange Variation Doubly Deferred (DERLD) |
| 50. Zsofia Polgar vs Schmittdiel |
| 1-0 | 25 |
1991 |
Budapest | B32 Sicilian |