Diefenbach, Jan
Current rating: 1428
Record: 2-6
| Grand Prix Prague 2018 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 561 | Valek, Robert (1484) | Lost 1-2 | -181482 |
| 2modern | 593 | Bramreiter, Dominik (1496) | Lost 0-2 | -181464 |
| 3modern | 916 | Citterio, Christin (1348) | Lost 1-2 | -201444 |
| 4modern | 943 | Grass, Christopher (1544) | Won 2-1 | +201464 |
| 5modern | 823 | Danis, Stefan (1466) | Won 2-1 | +181482 |
| 6modern | 651 | Marino, Alessio (1484) | Lost 1-2 | -181464 |
| 7modern | 699 | Sezi, Murat (1526) | Lost 1-2 | -171447 |
| 8modern | 640 | Quesada, Cyril (1400) | Lost 0-2 | -191428 |
| average opponent: 1468record: 2-6 | new rating: 1428 | |||