| 1577.5 | 1577.5 | 20 | 20 | Sparg, N (Nathan) | | EBC | 1805.3 | 1793.8 | 2023 South African Junior Closed Chess Championships (U18 Open) | 7 | 2023-04-03 | S | B | 0 | 0.19 | -0.19 | -3.8 | 0.21 | -0.21 | -4.2 |
| 1547.5 | 1542.7 | 20 | 20 | Sparg, N (Nathan) | | EBC | 1685.8 | 1661.3 | 2nd Master Vikings 2023 | 2 | 2023-02-23 | S | W | 0 | 0.38 | -0.38 | -6.3 | 0.4 | -0.4 | -8 |
| 1537.3 | 1139.2 | 20 | 20 | Sparg, N (Nathan) | | EBC | 1606.6 | 1187.2 | BC Chess Trials 5 of 5 2022 (A) | 8 | 2022-06-11 | R | B | 1 | 0.38 | 0.62 | 4.1 | 0.4 | 0.6 | 12 |
| 1485 | 1473.6 | 20 | 20 | Sparg, N (Nathan) | | EBC | 1530.4 | 1534.5 | Big Buffalo Swiss Open and Junior Closed 2021 | 1 | 2021-09-11 | S | B | 0 | 0.41 | -0.41 | -6.9 | 0.39 | -0.39 | -7.8 |
| 1498.9 | 1483.2 | 20 | 20 | Sparg, N (Nathan) | | EBC | 1509.1 | 1516.3 | BC Trials 1 2020 (U16A) | 3 | 2020-02-22 | S | B | 0 | 0.45 | -0.45 | -7.5 | 0.42 | -0.42 | -8.4 |
| 1342.4 | 1332.2 | 20 | 20 | Sparg, N (Nathan) | | EBC | 1443.1 | 1459.7 | Vikings League 4 of 6 2019 (A) | 5 | 2019-09-14 | S | B | 0 | 0.34 | -0.34 | -5.6 | 0.31 | -0.31 | -6.2 |
| 1348.4 | 1329.3 | 20 | 20 | Sparg, N (Nathan) | | EBC | 1449.7 | 1472.5 | Vikings League 3 of 6 2019 (A) | 2 | 2019-08-24 | S | W | 0.5 | 0.42 | 0.08 | 1.3 | 0.38 | 0.12 | 2.4 |
| 1318.6 | 1316.7 | 20 | 20 | Sparg, N (Nathan) | | EBC | 1525.9 | 1523.4 | Buffalo City Trials 4 of 5 2019 (U16A) | 5 | 2019-04-06 | S | W | 0 | 0.3 | -0.3 | -5 | 0.3 | -0.3 | -6 |
| 1177.9 | 1046.4 | 20 | 20 | Sparg, N (Nathan) | | EBC | 1353.3 | 1171 | Vikings Closed Sunday Rapid 2018 | 6 | 2018-12-09 | R | W | 1 | 0.34 | 0.66 | 6.2 | 0.4 | 0.6 | 12 |
| 1102.7 | 1109.2 | 20 | 20 | Sparg, N (Nathan) | | EBC | 1188.9 | 1205.4 | 4th Buffalo Trials 2018 (U14A) | 5 | 2018-05-05 | S | W | 0 | 0.44 | -0.44 | -7.3 | 0.43 | -0.43 | -8.6 |
| 1053.9 | 1077.6 | 20 | 20 | Sparg, N (Nathan) | | EBC | 1140.8 | 1151.8 | 2nd Buffalo Trials 2018 (U14A) | 4 | 2018-03-17 | S | B | 0 | 0.36 | -0.36 | -6 | 0.37 | -0.37 | -7.4 |
| 750 | 750 | 20 | 20 | Sparg, N (Nathan) | | EBC | 1086 | 1086 | 5Th Buffalo League 2017 (Division 1) | 1 | 2017-10-14 | S | B | 0 | 0.12 | -0.12 | -2 | -0.12 | 0.12 | 2.4 |
| 666 | 666 | 20 | 20 | Sparg, N (Nathan) | | EBC | 782 | 782 | 2Nd Buffalo City Chess Trials 2016 (U12) | 5 | 1900-01-01 | S | W | 1 | 0.34 | 0.66 | 11 | 0.66 | 0.34 | 6.8 |
