| 1202.6 | 1181.6 | 20 | 20 | Van Der Merwe, P (Phillip) | | GSV | 1152.4 | 500 | VaalPark Primary Open Chess 2023 (LSEN) | 5 | 2023-06-16 | R | B | 0 | 0.52 | -0.52 | -7.7 | 0.99 | -0.99 | -19.8 |
| 1202.6 | 1181.6 | 20 | 20 | Van Der Merwe, P (Phillip) | | GSV | 1152.4 | 500 | VaalPark Primary Open Chess 2023 (LSEN) | 10 | 2023-06-16 | R | W | 0 | 0.6 | -0.6 | -8.9 | 1 | -1 | -20 |
| 1184.7 | 1189.6 | 20 | 20 | Van Der Merwe, P (Phillip) | | GSV | 1150.9 | 1147.2 | Valia's Chess Tournament 2023 (LSEN) | 3 | 2023-05-06 | S | W | 1 | 0.58 | 0.42 | 7 | 0.59 | 0.41 | 8.2 |
| 1148.5 | 1147.6 | 20 | 20 | Van Der Merwe, P (Phillip) | | GSV | 1073.2 | 1061.4 | Hoerskool Drie Riviere Open 2023 (F) | 1 | 2023-03-11 | S | W | 0 | 0.63 | -0.63 | -10.5 | 0.64 | -0.64 | -12.8 |
| 1188 | 1200 | 20 | 20 | Van Der Merwe, P (Phillip) | | GSV | 1025.7 | 999.4 | Laerkool Midvaal Chess Open 2023 (LSEN) | 5 | 2023-01-28 | S | B | 0 | 0.65 | -0.65 | -10.8 | 0.69 | -0.69 | -13.8 |
