Tunnah, Iwan
Current rating: 1482
Record: 2-3
| Grand Prix Brussels 2020 (pioneer) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 431 | Matthijsse, Martin (1475) | Won 2-1 | +181518 |
| 2pioneer | 164 | Frey, Cyril (1521) | Lost 0-2 | -181500 |
| 3pioneer | 553 | Lecocq, Sora (1500) | Won 2-0 | +181518 |
| 4pioneer | 508 | Amaya Gonzalez, Manuel (1532) | Lost 1-2 | -181500 |
| 5pioneer | 545 | Deppenbroek, Bram (1506) | Lost 0-2 | -181482 |
| average opponent: 1507record: 2-3 | new rating: 1482 | |||