| 1442.8 | 1448.5 | 20 | 20 | Byliefeldt, L (Leroux) | | NBR | 1501.4 | 1531.6 | Bojanala Closed Chess Championships Stage 1 2024 (U16) | 4 | 2024-01-27 | S | B | 0.5 | 0.39 | 0.11 | 1.8 | 0.36 | 0.14 | 2.8 |
| 1284 | 1309.5 | 20 | 20 | Byliefeldt, L (Leroux) | | NBR | 1374.4 | 1390.4 | Bojanala Chess Federation Clash of Schools 2022 (PS Championship) | 2 | 2022-07-22 | S | W | 0 | 0.44 | -0.44 | -7.3 | 0.45 | -0.45 | -9 |
| 1311.5 | 1307.8 | 20 | 20 | Byliefeldt, L (Leroux) | | NBR | 1346.7 | 1338.6 | Winter Games Chess Championships 2022 (U13 Open) | 5 | 2022-04-30 | S | W | 0.5 | 0.5 | 0 | 0 | 0.51 | -0.01 | -0.2 |
| 1311.5 | 1307.8 | 20 | 20 | Byliefeldt, L (Leroux) | | NBR | 1346.7 | 1338.6 | RHS Know Thyself 2022 (B) | 4 | 2022-04-23 | S | W | 0 | 0.5 | -0.5 | -8.4 | 0.51 | -0.51 | -10.2 |
| 1322.7 | 1315 | 20 | 20 | Byliefeldt, L (Leroux) | | NBR | 1380.5 | 1379.7 | Brainstorm 2021 (U14+U16) | 5 | 2021-06-05 | S | W | 0 | 0.47 | -0.47 | -7.9 | 0.47 | -0.47 | -9.4 |
| 1308.1 | 1296.6 | 20 | 20 | Byliefeldt, L (Leroux) | | NBR | 1312.1 | 1293.3 | Back to the Board 2021 (U14) | 4 | 2021-04-17 | S | B | 0.5 | 0.45 | 0.05 | 0.8 | 0.46 | 0.04 | 0.8 |
| 1140.2 | 1120.6 | 20 | 20 | Byliefeldt, L (Leroux) | | NBR | 1352.7 | 1342.3 | Laerskool Proteapark 2020 (B) | 3 | 2020-02-29 | S | W | 0 | 0.29 | -0.29 | -4.8 | 0.28 | -0.28 | -5.6 |
| 1203.7 | 1186.5 | 20 | 20 | Byliefeldt, L (Leroux) | | NBR | 1363 | 1355.2 | Selly Park 2019 (B) | 1 | 2019-10-05 | S | B | 1 | 0.27 | 0.73 | 12.1 | 0.26 | 0.74 | 14.8 |
| 894.5 | 879.2 | 20 | 20 | Byliefeldt, L (Leroux) | | NBR | 889.6 | 868.6 | Laerskool Brits Tournament 2018 (U10) | 3 | 2018-08-04 | S | W | 0 | 0.55 | -0.55 | -9.1 | 0.55 | -0.55 | -11 |
| 778.3 | 779.8 | 20 | 20 | Byliefeldt, L (Leroux) | | NBR | 908.8 | 909.4 | Inter Regional 2018 (U10 Team) | 2 | 2018-05-04 | S | B | 0 | 0.31 | -0.31 | -5.1 | 0.31 | -0.31 | -6.2 |
| 500 | 500 | 20 | 20 | Bylieveld, L (Leroux) | | NBR | 500 | 500 | Vastrap 2017 (D) | 3 | 2017-02-11 | S | B | 0 | 0.5 | -0.5 | -8.3 | -0.5 | 0.5 | 10 |
| 404 | 404 | 20 | 20 | Bylieveld, L (Leroux) | | NBR | 490 | 490 | Bojanala Regional Championship 2016 (U8) | 2 | 2016-10-15 | S | W | 0.5 | 0.38 | 0.12 | 2 | 0.12 | 0.38 | 7.6 |
| 402 | 402 | 20 | 20 | Bylieveld, L (Leroux) | | NBR | 523 | 523 | Mountain Cambridge School Chess 2016 (U8) | 2 | 2016-09-10 | S | B | 0 | 0.34 | -0.34 | -5.6 | -0.34 | 0.34 | 6.8 |
| 387 | 387 | 20 | 20 | Bylieveld, L (Leroux) | | NBR | 650 | 650 | Laerskool Rustenburg 2016 (Uu8) | 4 | 2016-08-27 | S | B | 0 | 0.18 | -0.18 | -3 | -0.18 | 0.18 | 3.6 |
