Hajny, Petr
Current rating: 1470
| Grand Prix Prague 2009 (M10 limited) | starting rating: 1481 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 534 | Gargulak, Daniel (1536) | Lost 1-2 | -171464 |
| 2sealed | 732 | Markvart, Ondrej (1482) | Lost 1-2 | -181446 |
| 3sealed | 795 | Hochbegger, Stefan (1464) | Won 2-1 | +191465 |
| 4sealed | 838 | Vrsansky, Daniel (1481) | Won 2-1 | +181483 |
| 5sealed | 678 | Demjanic, Tomas J (1433) | Won 2-1 | +171500 |
| 6sealed | 666 | Biessmann, Oliver (1656) | Lost 1-2 | -151485 |
| 7sealed | 707 | Lysek, Andrzej (1500) | Lost 0-2 | -181467 |
| 8sealed | 673 | Musil, Tadeas (1486) | Won 2-1 | +191486 |
| 9sealed | 613 | Pekala, Szymon (1602) | Lost 0-2 | -161470 |
| top | average opponent: 1516record: 4-5 | new rating: 1470 | ||
| Grand Prix Prague 2003 (LGN limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 73 | Kritochuil, Ivo (1428) | Lost 0-2 | -201480 |
| 2sealed | 335 | Havel, Jan (1482) | Lost 1-2 | -181462 |
| 3sealed | 423 | Novak, Radek 2822 (1462) | Won 2-0 | +181480 |
| 4sealed | 335 | Bauer, Tomas (1483) | Lost 1-2 | -181462 |
| 5sealed | 372 | Kabele, Martin (1468) | Won 2-1 | +191481 |
| 6sealed | 256 | Kunst, Jan (1482) | Lost 0-2 | -181463 |
| 7sealed | 252 | Schneider, Valentin (1492) | Lost 1-2 | -181445 |
| 8sealed | 215 | Lassnig, Lukas (1446) | Won 2-0 | +181463 |
| 9sealed | 156 | Smejkal, Ales (1464) | Won 2-1 | +181481 |
| top | average opponent: 1467record: 4-5 | new rating: 1481 | ||
| Grand Prix Prague 2001 (PLS limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 181 | Civrny, Petr (1500) | Won 2-0 | +181518 |
| 2sealed | 135 | Ozsvald, Richard (1500) | Lost 0-2 | -181500 |
| 3sealed | 108 | Meulders, Fried (1499) | Lost 1-2 | -181482 |
| 4sealed | 194 | Snydr, Ondrej (1483) | Lost 0-2 | -181464 |
| 5sealed | 236 | Svoboda, Ladislav (1464) | Lost 1-2 | -181446 |
| 6sealed | 251 | Skalicky, Petr (1446) | Won 2-0 | +181464 |
| 7sealed | 193 | Stetina, Josef (1463) | Won 2-0 | +181482 |
| 8sealed | 175 | Benda, Petr (1482) | Won 2-1 | +181500 |
| top | average opponent: 1480record: 4-4 | new rating: 1500 | ||