| 1277.7 | 1268.2 | 20 | 20 | Roos, J (Justin) | | NBR | 1570 | 1568 | Schoemies Kings & Queens 2023 (Rooks) | 1 | 2023-03-18 | S | W | 0 | 0.2 | -0.2 | -3.3 | 0.19 | -0.19 | -3.8 |
| 1248.1 | 1222.5 | 20 | 20 | Roos, J (Justin) | | NBR | 1362.9 | 1347 | One For The Ages 2022 (U12) | 4 | 2022-07-16 | S | W | 0 | 0.41 | -0.41 | -6.8 | 0.4 | -0.4 | -8 |
| 1312.3 | 1298.4 | 20 | 20 | Roos, J (Justin) | | NBR | 1422.6 | 1413.3 | Laerskool Proteapark 2020 (B) | 1 | 2020-02-29 | S | B | 0 | 0.33 | -0.33 | -5.5 | 0.32 | -0.32 | -6.4 |
| 1374.7 | 1359.6 | 20 | 20 | Roos, J (Justin) | | NBR | 1379.7 | 1358.4 | Inter Region 2019 (U10 Open) | 4 | 2019-10-19 | S | B | 0 | 0.45 | -0.45 | -7.5 | 0.46 | -0.46 | -9.2 |
| 1259.3 | 1240.6 | 20 | 20 | Roos, J (Justin) | | NBR | 1211.9 | 1201.2 | Grenville 2019 (U10) | 4 | 2019-06-08 | S | W | 0 | 0.6 | -0.6 | -10 | 0.59 | -0.59 | -11.8 |
| 1256.1 | 1228.4 | 20 | 20 | Roos, J (Justin) | | NBR | 1097.5 | 1062.2 | 2019 South African Junior Closed Chess Championship (U8 Open) | 2 | 2019-03-17 | S | W | 1 | 0.73 | 0.27 | 5.4 | 0.74 | 0.26 | 5.2 |
| 1354.1 | 1343.6 | 20 | 20 | Roos, J (Justin) | | NBR | 1187.7 | 1171.6 | Rustenburg Noord Primary Tournament 2019 (U10) | 3 | 2019-02-09 | S | W | 0 | 0.74 | -0.74 | -12.3 | 0.74 | -0.74 | -14.8 |
| 1354.1 | 1343.6 | 20 | 20 | Roos, J (Justin) | | NBR | 1187.7 | 1171.6 | Laerskool Vastrap Tournament 2019 (D) | 2 | 2019-02-23 | S | W | 1 | 0.74 | 0.26 | 4.3 | 0.74 | 0.26 | 5.2 |
| 1289.4 | 1296.6 | 20 | 20 | Roos, J (Justin) | | NBR | 1320 | 1322.4 | Bojanala Regionals 2018 (U8) | 3 | 2018-09-15 | S | B | 0 | 0.42 | -0.42 | -7 | 0.43 | -0.43 | -8.6 |
| 1222 | 1225 | 20 | 20 | Roos, J (Justin) | | NBR | 1330.5 | 1337.2 | Laerskool Brits Tournament 2018 (U8) | 2 | 2018-08-04 | S | B | 1 | 0.33 | 0.67 | 11.1 | 0.33 | 0.67 | 13.4 |
| 1246.5 | 1256 | 20 | 20 | Roos, J (Justin) | | NBR | 1207 | 1205.2 | Laerskool Olienpark 2018 (U8) | 3 | 2018-04-21 | S | W | 1 | 0.59 | 0.41 | 6.8 | 0.6 | 0.4 | 8 |
