| 1635.7 | 1632.5 | 20 | 20 | Sparg, N (Nathan) | | EBC | 1789.6 | 1774.1 | Buffalo City Chess Closed 2023 | 5 | 2023-12-09 | S | W | 0.5 | 0.36 | 0.14 | 2.6 | 0.38 | 0.12 | 2.4 |
| 1677.5 | 1660.7 | 20 | 20 | Sparg, N (Nathan) | | EBC | 1805.3 | 1793.8 | 2023 South African Junior Closed Chess Championships (U18 Open) | 8 | 2023-04-03 | S | B | 0 | 0.31 | -0.31 | -6.2 | 0.3 | -0.3 | -6 |
| 1654.7 | 1630.7 | 20 | 20 | Sparg, N (Nathan) | | EBC | 1816.5 | 1808 | 3rd Vikings Champs 2023 (Prestige) | 3 | 2023-03-25 | S | B | 0.5 | 0.27 | 0.23 | 3.8 | 0.25 | 0.25 | 5 |
| 1518.7 | 1526.8 | 20 | 20 | Sparg, N (Nathan) | | EBC | 1591.1 | 1586 | BC Trials 3 2022 (U18A+U20A) | 5 | 2022-03-05 | S | W | 0 | 0.46 | -0.46 | -7.6 | 0.47 | -0.47 | -9.4 |
| 1559 | 1582.4 | 20 | 20 | Sparg, N (Nathan) | | EBC | 1617.4 | 1619.9 | BC Mortal Kombat Closed 2020 | 3 | 2020-12-12 | S | W | 0 | 0.47 | -0.47 | -8 | 0.5 | -0.5 | -10 |
| 1465.9 | 1492 | 20 | 20 | Sparg, N (Nathan) | | EBC | 1449.7 | 1472.5 | Vikings League 2 of 6 2019 (A) | 5 | 2019-08-17 | S | W | 0 | 0.56 | -0.56 | -9.3 | 0.56 | -0.56 | -11.2 |
| 1306.4 | 1320.8 | 20 | 20 | Sparg, N (Nathan) | | EBC | 1261.9 | 1262.5 | Buffalo City Junior Closed Finals 2018 (A) | 1 | 2018-09-29 | S | W | 0 | 0.59 | -0.59 | -9.8 | 0.61 | -0.61 | -12.2 |
| 1169.1 | 1163.3 | 20 | 20 | Sparg, N (Nathan) | | EBC | 1085 | 1085 | Buffalo City 1st Chess Trials 2018 (U14A) | 3 | 2018-02-17 | S | W | 1 | 0.64 | 0.36 | 6 | 0.63 | 0.37 | 7.4 |
| 850 | 850 | 20 | 20 | Sparg, N (Nathan) | | EBC | 806 | 806 | Ec Closed Inter Union 2016 (U12) | 6 | 2016-10-01 | S | B | 0.5 | 0.56 | -0.06 | -1 | -0.06 | 0.56 | 11.2 |
| 825 | 825 | 20 | 20 | Sparg, N (Nathan) | | EBC | 734 | 734 | 5Th Buffalo City Chess Trials 2016 (U12) | 2 | 1900-01-01 | S | B | 0 | 0.62 | -0.62 | -10.3 | -0.62 | 0.62 | 12.4 |
