| 1617.4 | 1612.6 | 20 | 20 | Marimuthu, S (Shaylen) | | GSV | 1553 | 1545.9 | Ekurhuleni 1st Standard Tournament 2026 (B) | 5 | 2026-02-14 | S | W | 1 | 0.62 | 0.38 | 6.3 | 0.62 | 0.38 | 7.6 |
| 1617.4 | 1612.6 | 20 | 20 | Marimuthu, S (Shaylen) | | GSV | 1553 | 1545.9 | MCA Tshwane Welcome 2026 (B) | 4 | 2026-01-24 | S | B | 0.5 | 0.53 | -0.03 | -0.5 | 0.54 | -0.04 | -0.8 |
| 1621.9 | 1624.1 | 20 | 20 | Marimuthu, S (Shaylen) | | GSV | 1550.8 | 1560.8 | LS Fonteine Open 18 Oct 2025 (B+C) | 5 | 2025-10-18 | S | W | 1 | 0.62 | 0.38 | 6.3 | 0.62 | 0.38 | 7.6 |
| 1542.3 | 1549.1 | 20 | 20 | Marimuthu, S (Shaylen) | | GSV | 1453.1 | 1454.5 | HS Driehoek Chess Open 2025 (A+B) | 3 | 2025-06-14 | S | B | 0 | 0.56 | -0.56 | -9.3 | 0.57 | -0.57 | -11.4 |
| 1542.3 | 1549.1 | 20 | 20 | Marimuthu, S (Shaylen) | | GSV | 1453.1 | 1454.5 | GDE (D8) Sedibeng West Schools Individuals 2025 (U18 Boys) | 5 | 2025-06-07 | S | B | 0.5 | 0.56 | -0.06 | -1 | 0.57 | -0.07 | -1.4 |
| 1542.3 | 948.2 | 20 | 20 | Marimuthu, S (Shaylen) | | GSV | 1453.1 | 1199.7 | Vaal Chess Club Blitz Open 31 May 2025 (A) | 3 | 2025-05-31 | B | W | 1 | 0.65 | 0.35 | 1.7 | 0.25 | 0.75 | 15 |
| 1475.9 | 1529.4 | 20 | 20 | Marimuthu, S (Shaylen) | | GSV | 1488.9 | 1491.9 | Sedibeng Chess Open 07 Sept 24 (B) | 4 | 2024-09-07 | S | W | 1 | 0.53 | 0.47 | 7.8 | 0.59 | 0.41 | 8.2 |
| 1508.8 | 1138.1 | 20 | 20 | Marimuthu, S (Shaylen) | | GSV | 1509.6 | 1200 | Midvaal Winter Classic 13 July 2024 (C) | 1 | 2024-07-13 | R | B | 0 | 0.46 | -0.46 | -5.5 | 0.39 | -0.39 | -7.8 |
| 1498.2 | 1488.5 | 20 | 20 | Marimuthu, S (Shaylen) | | GSV | 1448.8 | 1440.9 | AG Visser Open 2024 (B) | 4 | 2024-06-08 | S | W | 0 | 0.6 | -0.6 | -10 | 0.6 | -0.6 | -12 |
| 1494.2 | 1481.5 | 20 | 20 | Marimuthu, S (Shaylen) | | GSV | 1344.6 | 1337 | Sedibeng Chess Open 11 May 2024 (U15) | 3 | 2024-05-11 | S | W | 0 | 0.72 | -0.72 | -12 | 0.71 | -0.71 | -14.2 |
| 1468.6 | 1449.3 | 20 | 20 | Marimuthu, S (Shaylen) | | GSV | 1311.6 | 1266.6 | Fonteine Chess Open 2023 (C) | 4 | 2023-09-02 | S | W | 1 | 0.72 | 0.28 | 4.6 | 0.75 | 0.25 | 5 |
| 1365.4 | 1011.3 | 20 | 20 | Marimuthu, S (Shaylen) | | GSV | 1254.5 | 1200 | VaalPark Primary Open Chess 2023 (B) | 4 | 2023-06-16 | R | W | 0 | 0.67 | -0.67 | -9.9 | 0.32 | -0.32 | -6.4 |
| 1354.5 | 1347 | 20 | 20 | Marimuthu, S (Shaylen) | | GSV | 1145.9 | 1133.2 | D8 Schools Individuals 2023 (U15 Boys) | 3 | 2023-05-20 | S | B | 0 | 0.7 | -0.7 | -11.6 | 0.71 | -0.71 | -14.2 |
