Porubsky, Jan
Current rating: 1410
Record: 2-7
| Grand Prix Prague 2003 (LGN limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 130 | Kessel, Jens (1464) | Lost 0-2 | -191481 |
| 2sealed | 354 | Gilg, Michael (1499) | Lost 0-2 | -171464 |
| 3sealed | 411 | Zuzanak, Vojtech (1464) | Lost 0-2 | -181446 |
| 4sealed | 422 | Vagner, Vacek (1447) | Won 2-1 | +181464 |
| 5sealed | 363 | Hrbac, Pavel (1465) | Won 2-1 | +181482 |
| 6sealed | 269 | Dvorak, Jiri 8782 (1481) | Lost 0-2 | -181464 |
| 7sealed | 244 | Varga, Tomas (1463) | Lost 0-2 | -181446 |
| 8sealed | 219 | Smejkal, Ales (1446) | Lost 0-2 | -181428 |
| 9sealed | 173 | Stefanov, Dragomir (1427) | Lost 0-2 | -181410 |
| average opponent: 1462record: 2-7 | new rating: 1410 | |||