Vojkuvka, Bohumil
Current rating: 1519
Record: 13-13
| Grand Prix Prague 2014 (modern) | starting rating: 1536 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 168 | Piatkowski, Lukasz (1544) | Won 2-0 | +181554 |
| 2modern | 30 | Nilsson, Rasmus (1675) | Lost 0-2 | -151539 |
| 3modern | 354 | Oyntzen, Lars (1521) | Lost 1-2 | -191520 |
| 4modern | 534 | Michalski, Rafal (1478) | Lost 0-2 | -191501 |
| 5modern | 599 | Mack, Raoul (1452) | Won 2-1 | +181519 |
| top | average opponent: 1534record: 2-3 | new rating: 1519 | ||
| Grand Prix Prague 2011 (NPH limited) | starting rating: 1504 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 546 | Longoni, Raphael (1662) | Won 2-1 | +211525 |
| 2sealed | 614 | Milis, Michael (1699) | Won 2-0 | +211546 |
| 3sealed | 549 | Yashina, Valeria (1492) | Won 2-0 | +171563 |
| 4sealed | 571 | Rikola, Markku (1805) | Lost 0-2 | -141549 |
| 5sealed | 594 | Stefanescu, Alexandru (1524) | Won 2-0 | +181567 |
| 6sealed | 574 | Jacobs, Maarten (1610) | Lost 0-2 | -181549 |
| 7sealed | 611 | Hugony, Francesco (1823) | Lost 0-2 | -131536 |
| top | average opponent: 1659record: 4-3 | new rating: 1536 | ||
| Grand Prix Brussels 2010 (WWK standard) | starting rating: 1501 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 766 | Hakansson, Ola (1500) | Won 2-0 | +181519 |
| 2standard | 779 | Dulsster, Dries (1588) | Won 2-0 | +191538 |
| 3standard | 653 | Lange, Robert (1542) | Lost 1-2 | -181520 |
| 4standard | 843 | Englebert, Quentin (1569) | Won 2-0 | +191539 |
| 5standard | 747 | Polfliet, Bart (1536) | Lost 0-2 | -181521 |
| 6standard | 758 | Haken, Adam (1541) | Lost 0-2 | -171504 |
| top | average opponent: 1546record: 3-3 | new rating: 1504 | ||
| Grand Prix Prague 2009 (M10 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 205 | Gruschevoi, Kirill (1500) | Won 2-1 | +181518 |
| 2sealed | 70 | Novotny, Jakub 7909 (1518) | Won 2-0 | +181536 |
| 3sealed | 28 | Sorta, Stephan (1471) | Lost 0-2 | -191517 |
| 4sealed | 147 | Kornobis, Maciej (1518) | Lost 0-2 | -181499 |
| 5sealed | 176 | Rentzsch, Stefan (1678) | Won 2-0 | +211520 |
| 6sealed | 132 | Stibinger, Ales (1512) | Lost 1-2 | -181502 |
| 7sealed | 185 | Walter, Jakob (1501) | Won 2-0 | +181520 |
| 8sealed | 146 | Dosch, Sven (1476) | Lost 1-2 | -191501 |
| top | average opponent: 1522record: 4-4 | new rating: 1501 | ||