Quarmby, Mark
Current rating: 1448
Record: 1-4
| Grand Prix Utrecht 2019 (ELD limited) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 280 | Collins, Richard (1430) | Won 2-0 | +171481 |
| 2sealed | 340 | Tuinstra, Sebastiaan (1592) | Lost 0-1 | -161465 |
| 3sealed | 406 | Wasser, Ivo (1502) | Lost 1-2 | -171448 |
| average opponent: 1508record: 1-2 | new rating: 1448 | |||
| Grand Prix Birmingham 2019 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 23 | James, Sam (1500) | Lost 0-2 | -181482 |
| 2modern | 304 | Gouw, Esther (1463) | Lost 0-2 | -181464 |
| average opponent: 1482record: 0-2 | new rating: 1464 | |||