| 1675.8 | 1672.5 | 20 | 20 | Koutsouvelis, M (Matthew) | | ENM | 1662.2 | 1659 | EC Closed 2025 (U12 Boys) | 6 | 2025-09-07 | S | B | 0 | 0.47 | -0.47 | -8.8 | 0.47 | -0.47 | -9.4 |
| 1651.5 | 1654.3 | 20 | 20 | Koutsouvelis, M (Matthew) | | ENM | 1496.9 | 1497.3 | NMBCU Closed 2025 (U12) | 4 | 2025-06-14 | S | W | 1 | 0.72 | 0.28 | 4.6 | 0.72 | 0.28 | 5.6 |
| 1614.9 | 1611.3 | 20 | 20 | Koutsouvelis, M (Matthew) | | ENM | 1492.5 | 1492.9 | NMBCU Trial 4 2025 (U12) | 6 | 2025-05-10 | S | W | 1 | 0.68 | 0.32 | 5.3 | 0.68 | 0.32 | 6.4 |
| 1557.2 | 1570.4 | 20 | 20 | Koutsouvelis, M (Matthew) | | ENM | 1449 | 1445.6 | NMB 2nd Trials 2025 (U12) | 3 | 2025-03-08 | S | W | 1 | 0.67 | 0.33 | 5.5 | 0.69 | 0.31 | 6.2 |
| 1547.4 | 1534.2 | 20 | 20 | Koutsouvelis, M (Matthew) | | ENM | 1390 | 1372.3 | NMBCH Trial 1 2025 (U12) | 5 | 2025-02-15 | S | B | 1 | 0.64 | 0.36 | 6 | 0.65 | 0.35 | 7 |
| 1515.5 | 1200 | 20 | 20 | Koutsouvelis, M (Matthew) | | ENM | 1303.2 | 1200 | NMBCU vs BCC Derby Chess Invitational 2025 (Blitz Open B) | 1 | 2025-01-12 | B | W | 1 | 0.79 | 0.21 | 0.8 | 0.54 | 0.46 | 9.2 |
