Roos, Marina
Current rating: 1352
| Grand Prix Prague 2018 (modern) | starting rating: 1397 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 525 | Borchers, Niels (1460) | Lost 1-2 | -171380 |
| 2modern | 668 | Knifka, Fabian (1483) | Won 2-1 | +201400 |
| 3modern | 596 | Sarna, Kacper (1583) | Lost 0-2 | -151385 |
| 4modern | 837 | Roelens, Tiemen (1484) | Lost 0-2 | -161369 |
| 5modern | 851 | Hackl, Christoph (1412) | Lost 1-2 | -171352 |
| top | average opponent: 1484record: 1-4 | new rating: 1352 | ||
| Grand Prix Copenhagen 2017 (modern) | starting rating: 1488 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 390 | Rhodiner, Petter (1453) | Lost 1-2 | -191469 |
| 2modern | 634 | Wieringa, Jochem (1482) | Lost 0-2 | -181451 |
| 3modern | 886 | Andreasen, Simon (1464) | Won 2-1 | +191470 |
| 4modern | 659 | Regel, Adrian (1508) | Lost 1-2 | -181452 |
| 5modern | 792 | Bagge Johansson, Henrik (1434) | Lost 1-2 | -181434 |
| 6modern | 799 | Domotor, Robert (1449) | Lost 0-2 | -181416 |
| 7modern | 730 | Kuilman, Jelmer (1357) | Lost 1-2 | -191397 |
| top | average opponent: 1450record: 1-6 | new rating: 1397 | ||
| Grand Prix Lille 2015 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 310 | Kruglov, Alexey (1448) | Lost 0-2 | -191481 |
| 2legacy | 607 | Nieuwenhuis, Jordy (1481) | Won 2-0 | +181499 |
| 3legacy | 555 | Hohler, Arno (1579) | Lost 0-2 | -161483 |
| 4legacy | 651 | Delouye, Adrien (1478) | Won 2-1 | +171500 |
| 5legacy | 440 | Rivoal, Pierrick (1453) | Won 2-0 | +181518 |
| 6legacy | 409 | Catelain, Alexis (1659) | Lost 0-2 | -161502 |
| 7legacy | 422 | Deloly, Mathieu (1702) | Lost 1-2 | -141488 |
| top | average opponent: 1543record: 3-4 | new rating: 1488 | ||