| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. M Van der Werf vs Adams |
| ½-½ | 37 |
1988 |
EU-chJ U20 Arnhem | E12 Queen's Indian |
| 2. J Willemsen vs M Van der Werf |
| ½-½ | 21 |
1988 |
Martigny op | D38 Queen's Gambit Declined, Ragozin Variation |
| 3. M Van der Werf vs V Arapovic |
| ½-½ | 11 |
1988 |
Martigny op | A42 Modern Defense, Averbakh System |
| 4. M Van der Werf vs K Mokry |
| ½-½ | 33 |
1989 |
Groningen op | C41 Philidor Defense |
| 5. M Van der Werf vs I Stohl |
| ½-½ | 26 |
1989 |
Groningen op | B07 Pirc |
| 6. Dreev vs M Van der Werf |
| 1-0 | 43 |
1989 |
Ch Europe (juniors) | A46 Queen's Pawn Game |
| 7. Miles vs M Van der Werf |
 | 0-1 | 54 |
1989 |
Groningen op | A38 English, Symmetrical |
| 8. M Van der Werf vs Browne |
| ½-½ | 35 |
1989 |
Lugano (Switzerland) | E12 Queen's Indian |
| 9. I Rogers vs M Van der Werf |
| 1-0 | 39 |
1989 |
Switzerland | B15 Caro-Kann |
| 10. A Minasian vs M Van der Werf |
 | 1-0 | 27 |
1991 |
Groningen op | A01 Nimzovich-Larsen Attack |
| 11. M Van der Werf vs H van Putten |
| ½-½ | 30 |
1991 |
Dieren op | C29 Vienna Gambit |
| 12. Glek vs M Van der Werf |
| 0-1 | 39 |
1992 |
Groningen op | B01 Scandinavian |
| 13. Baburin vs M Van der Werf |
| 1-0 | 39 |
1992 |
It (open) | A75 Benoni, Classical with ...a6 and 10...Bg4 |
| 14. M Van der Werf vs Van Wely |
| ½-½ | 75 |
1993 |
Wijk aan Zee op | B08 Pirc, Classical |
| 15. M Van der Werf vs Barsov |
| ½-½ | 39 |
1994 |
NED-chT 9495 | D58 Queen's Gambit Declined, Tartakower (Makagonov-Bondarevsky) Syst |
| 16. M Van der Werf vs Van Wely |
| 0-1 | 71 |
1994 |
Amsterdam, NL-ch | E67 King's Indian, Fianchetto |
| 17. Van der Sterren vs M Van der Werf |
| ½-½ | 20 |
1994 |
Amsterdam, NL-ch | D30 Queen's Gambit Declined |
| 18. J Bosch vs M Van der Werf |
| ½-½ | 22 |
1994 |
Amsterdam, NL-ch | B08 Pirc, Classical |
| 19. Piket vs M Van der Werf |
| ½-½ | 53 |
1994 |
Amsterdam, NL-ch | E22 Nimzo-Indian, Spielmann Variation |
| 20. M Van der Werf vs Nijboer |
| 0-1 | 37 |
1994 |
Amsterdam, NL-ch | E62 King's Indian, Fianchetto |
| 21. M Van der Werf vs Van der Wiel |
| 0-1 | 57 |
1994 |
Amsterdam, NL-ch | D12 Queen's Gambit Declined Slav |
| 22. M Van der Werf vs Sosonko |
| 0-1 | 39 |
1994 |
Amsterdam, NL-ch | A08 King's Indian Attack |
| 23. M Van der Werf vs Sosonko |
| 0-1 | 10 |
1994 |
NED | A08 King's Indian Attack |
| 24. M Van der Werf vs I Sokolov |
| 0-1 | 40 |
1994 |
Amsterdam, NL-ch | A07 King's Indian Attack |
| 25. H Hoeksema vs M Van der Werf |
| 0-1 | 25 |
1994 |
Amsterdam, NL-ch | D31 Queen's Gambit Declined |