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| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. M van der Werf vs S Nikolaev |
| 1-0 | 60 | 1990 | Bern Open | B22 Sicilian, Alapin |
| 2. M van der Werf vs Boris German |
| 1-0 | 26 | 1990 | Groningen Open | B22 Sicilian, Alapin |
| 3. M van der Werf vs M Bosboom |
| 0-1 | 64 | 1992 | NED-chT | B22 Sicilian, Alapin |
| 4. M van der Werf vs D Heinbuch |
| ½-½ | 13 | 1992 | Biel MTO Open | B22 Sicilian, Alapin |
| 5. M van der Werf vs B Finegold |
| ½-½ | 29 | 1992 | Groningen Open | B22 Sicilian, Alapin |
| 6. M van der Werf vs R Har-Zvi |
| 0-1 | 37 | 1993 | Hoogovens Open | B22 Sicilian, Alapin |
| 7. M van der Werf vs Van Wely |
| 0-1 | 65 | 1994 | NED-chT 1994/95 | B22 Sicilian, Alapin |
| 8. M van der Werf vs P Tregubov |
| 1-0 | 54 | 1995 | Hoogovens Open | B22 Sicilian, Alapin |
| 9. M van der Werf vs Van Wely |
| 0-1 | 71 | 1995 | Hoogovens Open | B22 Sicilian, Alapin |
| 10. M van der Werf vs Petursson |
| 0-1 | 73 | 1996 | Reykjavik Open | B22 Sicilian, Alapin |
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Kibitzing
