Pekarek, Jan
Current rating: 1427
Record: 3-7
| Grand Prix Prague 2011 (NPH limited) | starting rating: 1480 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 151 | Majer, Filip (1446) | Lost 0-2 | -191461 |
| 2sealed | 247 | Jirasek, David (1484) | Lost 0-2 | -181443 |
| 3sealed | 265 | Rovny, Robert (1507) | Lost 1-2 | -161427 |
| 4sealed | 277 | Bockel, Michael (1446) | Won 2-0 | +181445 |
| 5sealed | 231 | Korinek, Petr (1464) | Lost 0-2 | -181427 |
| average opponent: 1470record: 1-4 | new rating: 1427 | |||
| Grand Prix Prague 2009 (M10 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 110 | Jurinek, Antonin (1500) | Won 2-1 | +181518 |
| 2sealed | 132 | Havel, Jan (1501) | Lost 0-2 | -181500 |
| 3sealed | 233 | Stanic, Bojan (1432) | Lost 0-2 | -201480 |
| 4sealed | 283 | Ottokar, Aleksander (1483) | Won 2-0 | +191499 |
| 5sealed | 259 | Runarsson, Hermann (1447) | Lost 0-2 | -191480 |
| average opponent: 1473record: 2-3 | new rating: 1480 | |||