Donhefner, Mateusz
Current rating: 1487
Record: 3-4
| Grand Prix Warsaw 2018 (GRN limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 446 | Reichardt, Thomas (1404) | Lost 1-2 | -201480 |
| 2sealed | 644 | Kobel, Louis (1482) | Lost 0-2 | -181462 |
| 3sealed | 876 | Marti, Jordi (1663) | Won 2-0 | +221484 |
| 4sealed | 788 | Kocyk, Radoslaw (1487) | Won 2-0 | +181502 |
| 5sealed | 435 | Raab, Tobias (1589) | Lost 1-2 | -161486 |
| 6sealed | 626 | Schmitt, Florian (1530) | Lost 1-2 | -181468 |
| 7sealed | 591 | Kowalczyk, Artur (1496) | Won 2-0 | +191487 |
| average opponent: 1522record: 3-4 | new rating: 1487 | |||