| 1352.3 | 1354.7 | 20 | 20 | Van Der Westhuizen, PJ (Petrus) | | NBR | 1541 | 1544.7 | Inter Region 2019 (U18 Open) | 2 | 2019-10-19 | S | W | 0 | 0.32 | -0.32 | -5.3 | 0.32 | -0.32 | -6.4 |
| 1334.4 | 1332.4 | 20 | 20 | Van Der Westhuizen, PJ (Petrus) | | NBR | 1520.6 | 1521.1 | Laerskool Rustenburg 2019 (U18) | 4 | 2019-08-17 | S | B | 0 | 0.24 | -0.24 | -4 | 0.24 | -0.24 | -4.8 |
| 1141.9 | 1144.2 | 20 | 20 | Van Der Westhuizen, PJ (Petrus) | | NBR | 1399.3 | 1412.3 | Fields College Open 2019 (Open) | 1 | 2019-02-02 | S | W | 0 | 0.24 | -0.24 | -4 | 0.23 | -0.23 | -4.6 |
| 1169.7 | 1170.2 | 20 | 20 | Van Der Westhuizen, PJ (Petrus) | | NBR | 1350.1 | 1360.2 | Lebone II Chess 2018 (U18) | 3 | 2018-09-01 | S | B | 0 | 0.25 | -0.25 | -4.1 | 0.24 | -0.24 | -4.8 |
| 1169.7 | 1170.2 | 20 | 20 | Van Der Westhuizen, PJ (Petrus) | | NBR | 1350.1 | 1360.2 | Bojanala Regionals 2018 (U18+U20) | 3 | 2018-09-15 | S | W | 0 | 0.33 | -0.33 | -5.5 | 0.32 | -0.32 | -6.4 |
| 736 | 736 | 20 | 20 | Van Der Westhuizen, Pj (Petrus) | | NBR | 1205 | 1205 | 2017 Inter-Regional (Under U16 Open) | 1 | 2017-05-12 | S | B | 0 | 0.05 | -0.05 | -0.8 | -0.05 | 0.05 | 1 |
| 737 | 737 | 20 | 20 | Van Der Westhuizen, Pj (Petrus) | | NBR | 1232 | 1232 | Vastrap Open 2016 (B) | 1 | 2016-02-13 | S | W | 0 | 0.04 | -0.04 | -0.7 | -0.04 | 0.04 | 0.8 |
| 737 | 737 | 20 | 20 | Van Der Westhuizen, Pj (Petrus) | | NBR | 1232 | 1232 | Bojanala Registration 2016 (U16) | 1 | 2016-01-30 | S | B | 0 | 0.04 | -0.04 | -0.7 | -0.04 | 0.04 | 0.8 |
| 824 | 824 | 20 | 20 | Van Der Westhuizen, Pj (Petrus) | | NBR | 1183 | 1183 | 2015 Brits Primary (Section A B) | 2 | 2015-05-23 | S | W | 0 | 0.1 | -0.1 | -1.7 | -0.1 | 0.1 | 2 |
| 914 | 914 | 20 | 20 | Van Der Westhuizen, Pj (Petrus) | | NBR | 1182 | 1182 | Inter Region 2015 (U14) | 2 | 2015-05-08 | S | B | 0 | 0.17 | -0.17 | -2.9 | -0.17 | 0.17 | 3.4 |
