| 1160.1 | 1155.3 | 20 | 20 | Van Der Westhuizen, GJH (Gerhardus) | | NBR | 997.9 | 990.5 | Inter Region 2019 (U16 Open) | 4 | 2019-10-19 | S | B | 0 | 0.65 | -0.65 | -10.8 | 0.65 | -0.65 | -13 |
| 1043.2 | 1048.9 | 20 | 20 | Van Der Westhuizen, GJH (Gerhardus) | | NBR | 926.3 | 916.9 | Lebone II Chess 2018 (U16) | 4 | 2018-09-01 | S | B | 0 | 0.59 | -0.59 | -9.8 | 0.61 | -0.61 | -12.2 |
| 841.8 | 846.4 | 20 | 20 | Van Der Westhuizen, GJH (Gerhardus) | | NBR | 783.8 | 783.8 | Laerskool Rustenburg 2018 (B) | 2 | 2018-03-24 | S | W | 0 | 0.61 | -0.61 | -10.1 | 0.61 | -0.61 | -12.2 |
| 629 | 629 | 20 | 20 | Van Der Westhuizen, Gjh (Gerhardus) | | NBR | 799 | 799 | Laerskool Rustenburg Noord Primary 2017 (U14) | 2 | 2017-08-11 | S | B | 0 | 0.28 | -0.28 | -4.6 | -0.28 | 0.28 | 5.6 |
| 0 | 0 | 20 | 20 | Van Der Westhuizen, Gjh (Gerhardus) | | NBR | 626 | 626 | 2015 Hs Brits (Section C (2003 To 2005) | 5 | 2015-03-07 | S | W | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
