Matejczuk, Piotr
Current rating: 1397
Record: 1-7
| Grand Prix Prague 2018 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 84 | Mielke, Fabian (1591) | Lost 0-2 | -161484 |
| 2modern | 697 | Amorim, Nuno (1489) | Won 2-1 | +181502 |
| 3modern | 479 | Gohlke, Christian (1500) | Lost 1-2 | -181484 |
| 4modern | 682 | Rentsch, Jari (1800) | Lost 1-2 | -131471 |
| 5modern | 831 | Burdziak, Amadeusz (1470) | Lost 1-2 | -181453 |
| 6modern | 814 | Gundlach, Martin (1445) | Lost 1-2 | -181435 |
| 7modern | 741 | Seibt, Anne (1396) | Lost 0-2 | -191416 |
| 8modern | 660 | Stepanek, Karl (1347) | Lost 0-2 | -191397 |
| average opponent: 1505record: 1-7 | new rating: 1397 | |||