Cerny, Jan
Current rating: 1486
Record: 3-4
| Grand Prix Prague 2003 (LGN limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 36 | Havel, Martin (1483) | Won 2-0 | +181518 |
| 3sealed | 116 | Baroch, Petr (1537) | Won 2-1 | +181536 |
| 4sealed | 6 | Stivoli, Federico (1531) | Won 2-1 | +181554 |
| 5sealed | 39 | Brodzak, Jan (1661) | Lost 1-2 | -161538 |
| 6sealed | 44 | Delvaux, Charles (1605) | Lost 0-2 | -171521 |
| 7sealed | 91 | Pisarski, Krystian (1535) | Lost 0-2 | -181503 |
| 8sealed | 136 | Gottschalk, Michael (1517) | Lost 1-2 | -171486 |
| average opponent: 1553record: 3-4 | new rating: 1486 | |||