Kubik, Petr
Current rating: 1400
Record: 4-10-1
| Grand Prix Prague 2011 (NPH limited) | starting rating: 1448 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 128 | Smid, Ondrej (1500) | Draw 1-1 | +11449 |
| 2sealed | 159 | Lazarev, Anton I (1500) | Lost 1-2 | -171432 |
| 3sealed | 229 | Wagner, Cameron (1466) | Won 2-1 | +191451 |
| 4sealed | 197 | Golubkin, Sergey (1498) | Lost 0-2 | -171434 |
| 5sealed | 226 | Petrovic, Mislav (1480) | Won 2-1 | +181452 |
| 6sealed | 174 | Langenhan, Soren (1519) | Lost 0-2 | -161436 |
| 7sealed | 161 | Strzelczyk, Adam (1467) | Lost 0-2 | -181418 |
| 8sealed | 133 | Adamek, Jiri (1403) | Lost 1-2 | -181400 |
| average opponent: 1479record: 2-5-1 | new rating: 1400 | |||
| Grand Prix Prague 2003 (LGN limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 176 | Domaszewski, Krzysztof (1550) | Lost 0-2 | -171483 |
| 3sealed | 180 | Marek, Libor (1432) | Won 2-0 | +171500 |
| 4sealed | 232 | Zafiris, Nico (1522) | Lost 1-2 | -181482 |
| 5sealed | 231 | Frycek, David (1502) | Won 2-0 | +191501 |
| 6sealed | 194 | Valyi Nagy, Gabor (1486) | Lost 0-2 | -191482 |
| 7sealed | 216 | Davydova, Zhanna (1561) | Lost 0-2 | -161466 |
| 8sealed | 191 | Siska, Jiri (1484) | Lost 1-2 | -181448 |
| average opponent: 1505record: 2-5 | new rating: 1448 | |||