Kolsch, Joscha
Current rating: 1640
Record: 11-4
| Grand Prix Brussels 2020 (pioneer) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 349 | Teodonio, Fabrizio (1448) | Won 2-1 | +171517 |
| 2pioneer | 223 | Giannini, Emanuele (1562) | Lost 1-2 | -171500 |
| 3pioneer | 509 | Chassagne, Romain (1638) | Won 2-1 | +201520 |
| 4pioneer | 440 | Morera, Danan (1616) | Lost 1-2 | -161504 |
| 5pioneer | 610 | Luis, Manuel (1342) | Won 2-1 | +151519 |
| 6pioneer | 497 | Winkler, Josef (1670) | Won 2-1 | +211540 |
| 7pioneer | 173 | Berger, Natalia (1607) | Won 2-1 | +191559 |
| 8pioneer | 130 | Loven, Axel (1453) | Won 2-1 | +161575 |
| 9pioneer | 79 | Gerrikagoitia, Keldor (1773) | Won 2-1 | +221597 |
| 10pioneer | 37 | Foures, Louis (1613) | Lost 1-2 | -181579 |
| 11pioneer | 112 | Debesson, Quentin (1521) | Won 2-0 | +171596 |
| 12pioneer | 88 | Chassagne, Marc (1682) | Lost 0-2 | -161580 |
| 13pioneer | 106 | Radosz, Wojciech (1747) | Won 2-0 | +211601 |
| 14pioneer | 70 | Gerecke, Piet (1712) | Won 2-0 | +201621 |
| 15pioneer | 64 | Fenaux-Briot, Romain (1675) | Won 2-1 | +191640 |
| average opponent: 1604record: 11-4 | new rating: 1640 | |||