Grontzki, Mathias
Current rating: 1421
Record: 3-8
| Grand Prix Amsterdam 2017 (AKH standard) | starting rating: 1430 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 63 | van Luijtelaar, Michael (1625) | Lost 1-2 | -141416 |
| 2standard | 355 | Bongers, Imke (1367) | Won 2-1 | +171433 |
| 3standard | 410 | Krastev, Preslav (1483) | Won 2-1 | +191452 |
| 4standard | 397 | Nickelsen, Kjartan (1548) | Lost 0-2 | -161436 |
| 5standard | 459 | Marfoli Galdiero, Francesco (1615) | Lost 0-2 | -151421 |
| top | average opponent: 1527record: 2-3 | new rating: 1421 | ||
| Grand Prix Utrecht 2017 (AER standard) | starting rating: 1447 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 244 | Hupkens, Tobie (1422) | Won 2-1 | +181465 |
| 2standard | 120 | Hof, Tristan (1506) | Lost 1-2 | -181447 |
| 3standard | 329 | Kisswani, Lennart (1501) | Lost 1-2 | -171430 |
| top | average opponent: 1476record: 1-2 | new rating: 1430 | ||
| Grand Prix Utrecht 2015 (MM2 limited) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 1041 | Perez, Ander (1496) | Lost 0-2 | -181464 |
| 3sealed | 1447 | Bor, Tomas (1510) | Lost 1-2 | -171447 |
| top | average opponent: 1503record: 0-2 | new rating: 1447 | ||
| Grand Prix Paris 2015 (DTK standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 432 | Le Courbe, Arthur (1500) | Lost 0-2 | -181482 |
| top | record: 0-1 | new rating: 1482 | ||