Kumstyr, Josef
Current rating: 1524
Record: 4-3
| Grand Prix Prague 2018 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 18 | Baptista, Jorge Miguel (1500) | Lost 1-2 | -181482 |
| 2modern | 612 | Sommer, Jan (1482) | Lost 1-2 | -181464 |
| 3modern | 849 | Brod, Mathias (1464) | Won 2-0 | +181482 |
| 4modern | 770 | Gulliksen, Alexander (1446) | Won 2-0 | +171499 |
| 5modern | 571 | Gandren, Christoffer (1504) | Won 2-1 | +181517 |
| 6modern | 299 | Belasta, Matej (1758) | Won 2-0 | +231540 |
| 7modern | 232 | Obermuller, Florian (1674) | Lost 1-2 | -161524 |
| average opponent: 1547record: 4-3 | new rating: 1524 | |||