| Interne Competitie SENIOREN |
| Senioren - Tonnij Mackaaij |
| Site | Boorstraat | Start date | 25-10-2022 |
| City | Utrecht | End date | 31-5-2023 |
| Country | Netherlands | Pairing system | Swiss |
| Organization | Schaakvereniging Oud Zuylen Utrecht | Arbiters | Marc Jongerius |
| Tonnij Mackaaij | |
| Rating | 1703 |
| Nr | White | Black | Result |
| 1 | Tonnij Mackaaij | Abs with msg | |
| 2 | Wouter Visser | Tonnij Mackaaij | 1−0 |
| 3 | Tonnij Mackaaij | Guus van Eeden | 1−0 |
| 4 | Louis Klaasens | Tonnij Mackaaij | 0−1 |
| 5 | Tonnij Mackaaij | Bertrand Weegenaar | ½−½ |
| 6 | Ed van Eeden | Tonnij Mackaaij | 0−1 |
| 7 | Piet Kooiman | Tonnij Mackaaij | 1−0 |
| 8 | Tonnij Mackaaij | Abs with msg | |
| 9 | Tonnij Mackaaij | Ed van Eeden | 0−1 |
| 10 | Tonnij Mackaaij | Jon van Midde | 1−0 |
| 11 | Tonnij Mackaaij | Abs with msg | |
| 12 | Tonnij Mackaaij | Abs with msg |