Hajek, Piotr
Current rating: 1409
Record: 15-20
| Grand Prix Krakow 2019 (M20 limited) | starting rating: 1439 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 456 | Koszewski, Gustaw (1489) | Lost 0-2 | -171422 |
| 2sealed | 564 | Warzyszynski, Piotr (1425) | Lost 0-2 | -181404 |
| 3sealed | 444 | Kozubowski, Mariusz (1466) | Won 2-1 | +191423 |
| 4sealed | 362 | Burton, Oliver (1571) | Won 2-1 | +211444 |
| 5sealed | 302 | Szyk, Andrzej (1472) | Lost 1-2 | -181426 |
| 6sealed | 317 | Taraska, Marta (1499) | Lost 0-2 | -171409 |
| top | average opponent: 1487record: 2-4 | new rating: 1409 | ||
| Grand Prix Warsaw 2018 (GRN limited) | starting rating: 1551 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 277 | Dauzvardis, Liudas (1500) | Lost 0-2 | -191532 |
| 2sealed | 584 | Oriez, Etienne (1432) | Lost 0-2 | -201512 |
| 3sealed | 816 | Jabs, Slawomir (1672) | Lost 0-2 | -151497 |
| 4sealed | 841 | Nechay, Valeriia (1451) | Lost 0-2 | -191478 |
| 5sealed | 801 | Capanda, Robert (1409) | Lost 0-2 | -191459 |
| 6sealed | 709 | Urbanczyk, Marek (1473) | Won 2-0 | +181477 |
| 7sealed | 602 | Pasarin Ferreira Garcia De Almeida, Anca Maria (1404) | Lost 0-2 | -191458 |
| 8sealed | 524 | Demont, Yann (1389) | Lost 0-2 | -191439 |
| top | average opponent: 1466record: 1-7 | new rating: 1439 | ||
| Grand Prix Munich 2003 (MRD limited) | starting rating: 1570 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 228 | Schlagin, Andreas (1532) | Won 2-1 | +171587 |
| 2sealed | 178 | Kraft, Lukas (1561) | Lost 1-2 | -191568 |
| 3sealed | 228 | Maciejewski, Maciej (1573) | Won 2-0 | +191587 |
| 4sealed | 202 | Bayer, Patrick (1683) | Lost 1-2 | -171570 |
| 5sealed | 300 | Mantik, Dirk (1500) | Lost 0-2 | -191551 |
| top | average opponent: 1570record: 2-3 | new rating: 1551 | ||
| Grand Prix Prague 2001 (PLS limited) | starting rating: 1536 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 237 | Hrncar, Michal (1500) | Lost 1-2 | -191517 |
| 2sealed | 200 | Vana, Miroslav (1482) | Won 2-1 | +171534 |
| 3sealed | 107 | Novak, Daniel (1498) | Won 2-1 | +181552 |
| 4sealed | 88 | Pikos, Tomasz (1518) | Lost 1-2 | -191533 |
| 5sealed | 203 | Holzweiss, Ralf (1621) | Won 2-1 | +201553 |
| 6sealed | 106 | Mazierski, Igor (1512) | Lost 0-2 | -191534 |
| 7sealed | 168 | Walter, Bjorn (1546) | Won 2-1 | +181552 |
| 8sealed | 110 | Papak, Tomas (1520) | Won 2-0 | +181570 |
| top | average opponent: 1525record: 5-3 | new rating: 1570 | ||
| Grand Prix Amsterdam 2001 (INV limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 181 | Gerstel, Bjorn (1500) | Won 2-1 | +181518 |
| 2sealed | 40 | van Abbe, Pepijn (1469) | Lost 0-2 | -191499 |
| 3sealed | 192 | Bolca, Sinan (1500) | Won 2-0 | +181517 |
| 4sealed | 104 | Summersberger, Helmut (1616) | Lost 0-2 | -161501 |
| 5sealed | 222 | Aga, Jeroen (1499) | Lost 1-2 | -181483 |
| 6sealed | 205 | Diezel, Michael (1436) | Won 2-1 | +171500 |
| 7sealed | 130 | Moerman, Koen (1469) | Won 2-1 | +171517 |
| 8sealed | 99 | Germand, Yoan (1531) | Won 2-1 | +191536 |
| top | average opponent: 1503record: 5-3 | new rating: 1536 | ||