Opata, Jan
Current rating: 1417
Record: 5-10-1
| Grand Prix Prague 2013 (M14 limited) | starting rating: 1463 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 143 | Sylvester, Sebastian (1523) | Won 2-1 | +191482 |
| 2sealed | 118 | Mahler, Sebastian (1441) | Lost 0-2 | -191463 |
| 3sealed | 354 | Fruhnert, Martin (1500) | Lost 0-2 | -171446 |
| 4sealed | 534 | Kraus, Dieter (1479) | Lost 0-2 | -171429 |
| 5sealed | 660 | Hrabe, Matyas (1444) | Won 2-1 | +181447 |
| 6sealed | 564 | Derory, Wilfried (1522) | Lost 1-2 | -171430 |
| 7sealed | 494 | Beck, Markus (1593) | Won 2-0 | +211451 |
| 8sealed | 376 | Myslinski, Grzegorz (1480) | Lost 0-2 | -171434 |
| 9sealed | 345 | Arlt, Noomi (1488) | Lost 0-2 | -171417 |
| average opponent: 1497record: 3-6 | new rating: 1417 | |||
| Grand Prix Prague 2009 (M10 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 107 | Brehovsky, Josef (1448) | Lost 0-2 | -191481 |
| 2sealed | 287 | Galbayv, Vilem (1482) | Won 2-0 | +181499 |
| 3sealed | 239 | Landau, Michael (1445) | Lost 1-2 | -191480 |
| 4sealed | 280 | Vladik, Pavel (1587) | Lost 1-2 | -161464 |
| 5sealed | 285 | Novotny, Patrik (1467) | Won 2-0 | +181482 |
| 6sealed | 257 | Vapenik, Karel (1433) | Draw 1-1 | -11481 |
| 7sealed | 215 | Van Der Sloot, David (1479) | Lost 1-2 | -181463 |
| average opponent: 1477record: 2-4-1 | new rating: 1463 | |||