Guillaume, David
Current rating: 1460
Record: 3-5
| Grand Prix Brussels 2020 (pioneer) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 308 | Nerge, Bjorn (1498) | Won 2-0 | +181518 |
| 2pioneer | 314 | Sasiain, Gaizka (1523) | Lost 1-2 | -181500 |
| 3pioneer | 647 | Errico, Lancelot (1457) | Lost 1-2 | -191481 |
| 4pioneer | 688 | Lyons, Ciaran (1489) | Lost 1-2 | -181463 |
| 5pioneer | 679 | Molinie, Roland (1292) | Won 2-1 | +151478 |
| 6pioneer | 554 | Schunn, Fabian (1480) | Lost 1-2 | -181460 |
| 7pioneer | 497 | Eggenschwiler, Simon (1441) | Lost 1-2 | -181442 |
| 8pioneer | 406 | Tiete, Julien (1450) | Won 2-0 | +181460 |
| average opponent: 1454record: 3-5 | new rating: 1460 | |||