| 1384.3 | 1396.3 | 20 | 20 | Van Der Westhuizen, PJ (Petrus) | | NBR | 1547.4 | 1553.7 | Lebone II 2019 (Open) | 3 | 2019-09-14 | S | B | 0 | 0.27 | -0.27 | -4.5 | 0.28 | -0.28 | -5.6 |
| 1372.3 | 1384.8 | 20 | 20 | Van Der Westhuizen, PJ (Petrus) | | NBR | 1520.6 | 1521.1 | Laerskool Rustenburg 2019 (U18) | 3 | 2019-08-17 | S | W | 0 | 0.37 | -0.37 | -6.1 | 0.38 | -0.38 | -7.6 |
| 1218.9 | 1224.6 | 20 | 20 | Van Der Westhuizen, PJ (Petrus) | | NBR | 1399.3 | 1412.3 | Rustenburg Noord Primary Tournament 2019 (A) | 4 | 2019-02-09 | S | B | 0 | 0.25 | -0.25 | -4.1 | 0.24 | -0.24 | -4.8 |
| 1199.2 | 1205.2 | 20 | 20 | Van Der Westhuizen, PJ (Petrus) | | NBR | 1322.9 | 1325.6 | Laerskool Brits Tournament 2018 (U18) | 4 | 2018-08-04 | S | B | 0 | 0.31 | -0.31 | -5.1 | 0.32 | -0.32 | -6.4 |
| 1099.9 | 1098.8 | 20 | 20 | Van Der Westhuizen, PJ (Petrus) | | NBR | 1307.7 | 1316 | Laerskool Vastrap 2018 (Open) | 2 | 2018-02-03 | S | W | 0 | 0.3 | -0.3 | -5 | 0.29 | -0.29 | -5.8 |
| 1007 | 1007 | 20 | 20 | Van Der Westhuizen, Pj (Petrus) | | NBR | 1159 | 1159 | Bojanala Regional Championship 2016 (U16) | 5 | 2016-10-15 | S | W | 0 | 0.3 | -0.3 | -5 | -0.3 | 0.3 | 6 |
| 1014 | 1014 | 20 | 20 | Van Der Westhuizen, Pj (Petrus) | | NBR | 1161 | 1161 | Mountain Cambridge School Chess 2016 (U16) | 4 | 2016-09-10 | S | B | 0 | 0.3 | -0.3 | -5 | -0.3 | 0.3 | 6 |
| 1056 | 1056 | 20 | 20 | Van Der Westhuizen, Pj (Petrus) | | NBR | 1285 | 1285 | Grenville Nw Regionals (Under 14 (Born 2002 2003) | 2 | 2015-10-24 | S | W | 0 | 0.21 | -0.21 | -3.5 | -0.21 | 0.21 | 4.2 |
| 999 | 999 | 20 | 20 | Van Der Westhuizen, Pj (Petrus) | | NBR | 1269 | 1269 | 2015 Fields Chess Tournament (Under 14 (Born 2002 2003) | 5 | 2015-08-15 | S | W | 0 | 0.17 | -0.17 | -2.8 | -0.17 | 0.17 | 3.4 |
| 1010 | 1010 | 20 | 20 | Van Der Westhuizen, Pj (Petrus) | | NBR | 1182 | 1182 | Inter Region 2015 (U14) | 5 | 2015-05-09 | S | W | 0 | 0.27 | -0.27 | -4.5 | -0.27 | 0.27 | 5.4 |
| 894 | 894 | 20 | 20 | Van Der Westhuizen, Pj (Petrus) | | NBR | 1052 | 1052 | Brits Primary (Under 14) | 5 | 2014-04-12 | S | W | 0 | 0.29 | -0.29 | -4.8 | -0.29 | 0.29 | 5.8 |
| 886 | 886 | 20 | 20 | Van Der Westhuizen, Pj (Petrus) | | NBR | 1126 | 1126 | Nhka Chess U12 | 2 | 2013-08-31 | S | W | 1 | 0.2 | 0.8 | 13.3 | 0.8 | 0.2 | 4 |
| 886 | 886 | 20 | 20 | Van Der Westhuizen, Pj (Petrus) | | NBR | 1126 | 1126 | Fields Open -U12 | 2 | 2013-07-20 | S | W | 1 | 0.2 | 0.8 | 13.3 | 0.8 | 0.2 | 4 |
| 864 | 864 | 20 | 20 | Van Der Westhuizen, J (Jeremy) | | NBR | 1107 | 1107 | Sellypark U12 | 2 | 2013-08-24 | S | B | 0 | 0.2 | -0.2 | -3.3 | -0.2 | 0.2 | 4 |
| 864 | 864 | 20 | 20 | Van Der Westhuizen, J (Jeremy) | | NBR | 1107 | 1107 | Bojanala Open -U12 | 2 | 2013-07-27 | S | B | 0 | 0.2 | -0.2 | -3.3 | -0.2 | 0.2 | 4 |
