Marecek, Jan
Current rating: 1520
Record: 4-3-1
| Grand Prix Prague 2003 (LGN limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 206 | Koci, Martin (1500) | Won 1-0 | +181518 |
| 2sealed | 189 | Jansen, Patrick (1463) | Lost 0-2 | -191499 |
| 3sealed | 302 | Kotter, Carsten (1541) | Won 2-1 | +191518 |
| 4sealed | 251 | Muller, Andreas (1628) | Draw 1-1 | +21520 |
| 5sealed | 198 | Pickert, Janko (1543) | Lost 0-2 | -181502 |
| 6sealed | 242 | Todorovic, Borut (1498) | Lost 1-2 | -181484 |
| 7sealed | 239 | Bischoff, Helmut (1483) | Won 2-1 | +181502 |
| 8sealed | 168 | Kratena, Ivo (1483) | Won 2-1 | +181520 |
| average opponent: 1517record: 4-3-1 | new rating: 1520 | |||