Zelezny, Jan
Current rating: 1682
Record: 27-17-1
| Grand Prix Prague 2019 (UMA limited) | starting rating: 1612 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 472 | Viciani, Stefano (1736) | Lost 0-2 | -161596 |
| 4sealed | 573 | Kaufmann, David (1639) | Won 2-0 | +191615 |
| 5sealed | 243 | Gobert, Alois (1762) | Lost 0-2 | -151600 |
| 6sealed | 496 | Ammirata, Antonino (1652) | Won 2-0 | +191619 |
| 7sealed | 370 | La Placa, Andrea (1648) | Won 2-0 | +181637 |
| 8sealed | 304 | Pibernat Roses, Marc (1508) | Won 2-0 | +161653 |
| 9sealed | 679 | Paricio Perez, Adria (1589) | Won 2-1 | +171670 |
| 10draft | 584 | Calzolari, Lorenzo (1641) | Lost 0-2 | -191651 |
| 11draft | 584 | Zeil, Jean-Julien (1750) | Won 2-0 | +201671 |
| 12draft | 584 | Dudesek, Stepan (1557) | Won 2-1 | +161687 |
| 13draft | 674 | Schuetz, Stefan (2082) | Lost 0-2 | -111676 |
| 14draft | 654 | Li, Fabien (2002) | Lost 0-2 | -131663 |
| 15draft | 572 | Landgraf, Alexander (1684) | Won 2-0 | +191682 |
| top | average opponent: 1712record: 8-5 | new rating: 1682 | ||
| Grand Prix Prague 2017 (AER limited) | starting rating: 1620 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 346 | Hallgarde, Magnus (1453) | Won 2-0 | +151635 |
| 2sealed | 102 | Di Pancrazio, Marc (1517) | Lost 0-2 | -201615 |
| 3sealed | 590 | Neumann, Alexander (1609) | Won 2-1 | +181633 |
| 4sealed | 558 | Choca, Joao (1717) | Lost 1-2 | -171616 |
| 5sealed | 615 | Rohling, Markus (1514) | Won 2-0 | +171633 |
| 6sealed | 595 | Rosnes, Christian (1516) | Won 2-1 | +151648 |
| 7sealed | 357 | Kosian, Benedikt (1548) | Lost 1-2 | -191629 |
| 8sealed | 327 | Aarela, Tommi (1700) | Lost 0-2 | -171612 |
| top | average opponent: 1572record: 4-4 | new rating: 1612 | ||
| Grand Prix Warsaw 2014 (JOU limited) | starting rating: 1569 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 276 | Paprocki, Bartlomiej (1444) | Won 2-0 | +151584 |
| 2sealed | 226 | Jarrold, Joseph (1474) | Won 2-1 | +161600 |
| 3sealed | 35 | Johansson, Felix (1536) | Won 2-1 | +171617 |
| 4sealed | 24 | Kolba, Adrian (1554) | Won 2-0 | +171634 |
| 5sealed | 59 | Fior, Daniel (1865) | Lost 0-2 | -141620 |
| 6sealed | 78 | Wodecki, Krzysztof (1558) | Won 2-0 | +171637 |
| 7sealed | 35 | Tyminski, Michal (1532) | Lost 0-0 | -201617 |
| 8sealed | 179 | Juza, Martin (1759) | Won 2-0 | +211638 |
| 9sealed | 223 | White, Mike (1664) | Lost 1-2 | -181620 |
| top | average opponent: 1598record: 6-3 | new rating: 1620 | ||
| Grand Prix Prague 2009 (M10 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 645 | Luppi, Stefano (1501) | Won 2-0 | +181518 |
| 2sealed | 599 | Jedlicka, Michal (1366) | Lost 0-2 | -211497 |
| 3sealed | 673 | Westlund, Fredrik (1507) | Won 2-0 | +181515 |
| 4sealed | 694 | Chodak, Michal (1491) | Won 2-1 | +181533 |
| 5sealed | 555 | Jurisic, Vlatko (1530) | Won 2-0 | +181551 |
| 6sealed | 602 | Oberauer, Felix (1493) | Lost 0-2 | -191532 |
| 7sealed | 645 | Lindgren, Tommi (1690) | Won 2-0 | +211553 |
| 8sealed | 595 | Lelek, Jakub (1561) | Won 2-0 | +181571 |
| 9sealed | 575 | Smith, Chris [IRL] (1459) | Won 2-1 | +161587 |
| 10draft | 52 | Pavelek, Jakub (1593) | Won 2-0 | +181605 |
| 11draft | 5 | Reichinger, Hannes (1597) | Draw 1-1 | 01605 |
| 12draft | 17 | Van Goethem, Stijn (1699) | Lost 0-2 | -161589 |
| 13draft | 43 | Karlhuber-vockl, Peter (1548) | Won 2-0 | +171606 |
| 14draft | 31 | Macosek, Jan (1592) | Lost 0-2 | -181588 |
| 15draft | 61 | Bachura, Miroslav (1534) | Lost 0-2 | -191569 |
| top | average opponent: 1544record: 9-5-1 | new rating: 1569 | ||