3 games · 2016–2026 · 3 classical · 0 online
Van der Werf 12 draws0 Van Ketel
66.7% for Van der Werf
Openings between them
| A13 | English Opening: Agincourt Defense | 1 | 100.0% |
| A41 | Rat Defense: English Rat | 1 | 50.0% |
| E20 | Nimzo-Indian Defense: Kmoch Variation | 1 | 50.0% |
All games
| Van Ketel, R2234 | ½-½ | Van der Werf, M2384 | ECU Senior +50 2026 | 2026 |
| Van Ketel, R2191 | ½-½ | Van der Werf, M2395 | 33rd World Senior 50+ | 2025 |
| Van der Werf, M2416 | 1-0 | Van Ketel, R2211 | 76th Noteboom Open | 2016 |