| 1204.5 | 1206.6 | 20 | 20 | Van Der Westhuizen, PJ (Petrus) | | NBR | 1399.3 | 1412.3 | Fields College Open 2019 (Open) | 2 | 2019-02-02 | S | B | 0 | 0.23 | -0.23 | -3.8 | 0.22 | -0.22 | -4.4 |
| 1132.1 | 1135 | 20 | 20 | Van Der Westhuizen, PJ (Petrus) | | NBR | 1350.1 | 1360.2 | Bojanala Regionals 2018 (U18+U20) | 4 | 2018-09-15 | S | B | 0 | 0.2 | -0.2 | -3.3 | 0.2 | -0.2 | -4 |
| 1113.5 | 1114.2 | 20 | 20 | Van Der Westhuizen, PJ (Petrus) | | NBR | 1322.9 | 1325.6 | Laerskool Brits Tournament 2018 (U18) | 2 | 2018-08-04 | S | B | 0 | 0.21 | -0.21 | -3.5 | 0.21 | -0.21 | -4.2 |
| 985 | 985 | 20 | 20 | Van Der Westhuizen, Pj (Petrus) | | NBR | 1206 | 1206 | Bojanala Inter-Region 2017 (U16) | 3 | 2017-09-16 | S | W | 0 | 0.22 | -0.22 | -3.7 | -0.22 | 0.22 | 4.4 |
| 930 | 930 | 20 | 20 | Van Der Westhuizen, Pj (Petrus) | | NBR | 1187 | 1187 | Laerskool Brits Chess 2017 (U16) | 3 | 2017-08-25 | S | B | 0.5 | 0.18 | 0.32 | 5.3 | 0.32 | 0.18 | 3.6 |
| 930 | 930 | 20 | 20 | Van Der Westhuizen, Pj (Petrus) | | NBR | 1187 | 1187 | Laerskool Rustenburg Noord Primary 2017 (U16) | 4 | 2017-08-11 | S | W | 0 | 0.18 | -0.18 | -3 | -0.18 | 0.18 | 3.6 |
| 771 | 771 | 20 | 20 | Van Der Westhuizen, Pj (Petrus) | | NBR | 1159 | 1159 | Registration Tournament 2017 (U16) | 3 | 2017-01-27 | S | W | 0 | 0.09 | -0.09 | -1.5 | -0.09 | 0.09 | 1.8 |
| 832 | 832 | 20 | 20 | Van Der Westhuizen, Pj (Petrus) | | NBR | 1161 | 1161 | Mountain Cambridge School Chess 2016 (U16) | 1 | 2016-09-10 | S | W | 0 | 0.12 | -0.12 | -2 | -0.12 | 0.12 | 2.4 |
| 895 | 895 | 20 | 20 | Van Der Westhuizen, J (Jeremy) | | PLA | 1054 | 1054 | Platina 2012 Open Chess Under 12 | 2 | 2012-08-18 | S | W | 0 | 0.29 | -0.29 | -4.8 | -0.29 | 0.29 | 5.8 |
