Kumstyr, Vaclav
Current rating: 1539
Record: 5-3
| Grand Prix Prague 2018 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 385 | Becker, Felix (1505) | Won 2-0 | +181518 |
| 2modern | 346 | Chebiryak, Yury (1543) | Lost 0-2 | -171501 |
| 3modern | 702 | Wiener, Alexander (1527) | Lost 1-2 | -181483 |
| 4modern | 723 | Frantz, Max (1497) | Won 2-1 | +181501 |
| 5modern | 705 | Barbero, Joseph (1425) | Won 2-1 | +171518 |
| 6modern | 566 | Raevich, Sergai (1514) | Lost 1-2 | -181500 |
| 7modern | 487 | Marino, Alessio (1502) | Won 2-1 | +181518 |
| 8modern | 449 | Kawonczyk, Maciej (1711) | Won 2-0 | +211539 |
| average opponent: 1528record: 5-3 | new rating: 1539 | |||