Marak, Filip
Current rating: 1503
Record: 7-7-1
| Grand Prix Prague 2003 (LGN limited) | starting rating: 1518 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 132 | Stibinger, Ales (1525) | Lost 0-2 | -171501 |
| 2sealed | 249 | Brehovsky, Josef (1482) | Won 2-0 | +171518 |
| 3sealed | 190 | Holmberg, Alexander (1536) | Won 2-1 | +191537 |
| 4sealed | 241 | Gausdal, Bjorn (1704) | Lost 0-2 | -151522 |
| 5sealed | 261 | Kucharski, Mariusz (1534) | Won 2-0 | +181540 |
| 6sealed | 167 | Pigeon, Pierre (1532) | Lost 1-2 | -181522 |
| 7sealed | 194 | Lavo, Radek (1504) | Lost 0-2 | -191503 |
| average opponent: 1545record: 3-4 | new rating: 1503 | |||
| Grand Prix Prague 2001 (PLS limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 56 | Wimmersberger, Andreas (1500) | Won 2-1 | +181518 |
| 2sealed | 58 | Jaki, Thomas (1488) | Lost 0-2 | -191499 |
| 3sealed | 176 | Kruger, Sebastian (1500) | Won 2-0 | +181517 |
| 4sealed | 119 | Lehmann, Jens (1517) | Lost 0-2 | -181499 |
| 5sealed | 169 | Schraut, Andreas (1548) | Lost 1-2 | -171482 |
| 6sealed | 214 | Josek, Rostislav (1486) | Draw 1-1 | 01482 |
| 7sealed | 182 | Simersky, Antonin (1483) | Won 2-0 | +181500 |
| 8sealed | 141 | Vogler, Sebastian (1500) | Won 2-0 | +181518 |
| average opponent: 1503record: 4-3-1 | new rating: 1518 | |||