Jaroch, Jan
Current rating: 1487
Record: 1-2-1
| Grand Prix Warsaw 2018 (GRN limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 502 | Arnason, Sigurdur (1500) | Lost 1-2 | -181482 |
| 2sealed | 625 | Plescan, Catalin (1452) | Draw 1-1 | -11481 |
| 3sealed | 767 | Kostadinoski, Rade (1482) | Won 2-0 | +181499 |
| 4sealed | 618 | Arndt, Marcel (1827) | Lost 0-2 | -121487 |
| average opponent: 1565record: 1-2-1 | new rating: 1487 | |||