Poliak, Jakub
Current rating: 1562
Record: 11-8
| Grand Prix Prague 2018 (modern) | starting rating: 1607 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 75 | Foures, Louis (1483) | Lost 1-2 | -201587 |
| 2modern | 599 | Peltier, Charles (1398) | Lost 0-2 | -211566 |
| 3modern | 967 | Buescher, William (1470) | Won 2-1 | +161582 |
| 4modern | 860 | Dlugosz, Piotr (1464) | Lost 0-2 | -201562 |
| average opponent: 1454record: 1-3 | new rating: 1562 | |||
| Grand Prix Prague 2011 (NPH limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 525 | Feher, Attila (1510) | Won 2-1 | +181518 |
| 2sealed | 550 | Juvcenko, Igor (1432) | Won 2-0 | +171535 |
| 3sealed | 569 | Zigo, Peter (1534) | Won 2-0 | +181553 |
| 4sealed | 512 | Lybaert, Marijn (1888) | Won 2-1 | +241577 |
| 5sealed | 520 | Szenasi, Csaba (1734) | Won 2-1 | +201597 |
| 6sealed | 513 | Larsson, Joel (1767) | Lost 1-2 | -151582 |
| 7sealed | 546 | Pinto, Antonio (1650) | Won 2-1 | +201602 |
| 8sealed | 518 | Korbl, Adorjan (1661) | Won 2-1 | +191621 |
| 9sealed | 511 | Lindroos, Jani (1748) | Lost 1-2 | -161605 |
| 10draft | 41 | Driessen, Thomas (1646) | Lost 0-2 | -171588 |
| 11draft | 27 | Ecker, Niklas (1534) | Won 2-0 | +171605 |
| 12draft | 8 | Meyer, Tony (1594) | Won 2-0 | +181623 |
| 13draft | 41 | Hanzalek, Jan (1648) | Lost 1-2 | -181605 |
| 14draft | 53 | Neave, Jesse (1645) | Won 2-0 | +191624 |
| 15draft | 45 | Nikitin, Dmitry (1714) | Lost 1-2 | -171607 |
| average opponent: 1647record: 10-5 | new rating: 1607 | |||