Jezierski, Grzegorz
Current rating: 1685
Record: 39-30
| Grand Prix Prague 2019 (UMA limited) | starting rating: 1717 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 836 | Widawski, William (1554) | Won 2-0 | +151732 |
| 3sealed | 227 | Montero Carbona, Andreu (1518) | Lost 0-2 | -221710 |
| 4sealed | 520 | Pashley, Stephen (1443) | Won 2-0 | +141724 |
| 5sealed | 451 | Amico, Alessandro (1554) | Lost 1-2 | -211703 |
| 6sealed | 446 | Kocsis, Gabor (1738) | Lost 1-2 | -181685 |
| top | average opponent: 1562record: 2-3 | new rating: 1685 | ||
| Grand Prix Warsaw 2017 (XLN standard) | starting rating: 1738 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 123 | Loffredo, Luca (1586) | Won 2-1 | +151753 |
| 4standard | 48 | Choca, Joao (1969) | Lost 0-2 | -141739 |
| 5standard | 222 | Ciotta, Andrea (1689) | Won 2-0 | +171756 |
| 6standard | 66 | Weinhardt, Denny (1913) | Lost 0-2 | -151741 |
| 7standard | 238 | Jansen, Sepp (1564) | Won 2-0 | +141755 |
| 8standard | 110 | Ward, Peter (1809) | Lost 1-2 | -171738 |
| 9standard | 172 | Steiner, Alexander (1559) | Lost 0-2 | -211717 |
| top | average opponent: 1727record: 3-4 | new rating: 1717 | ||
| Grand Prix Krakow 2015 (DTK standard) | starting rating: 1777 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 20 | Cook, Tristan (1551) | Won 2-0 | +141791 |
| 4standard | 476 | Vantuch, Matej (1878) | Lost 1-2 | -171774 |
| 5standard | 137 | Gromada, Piotr (1539) | Lost 0-2 | -221752 |
| 6standard | 311 | Maynard, Pascal (1943) | Lost 1-2 | -141738 |
| top | average opponent: 1727record: 1-3 | new rating: 1738 | ||
| Grand Prix Warsaw 2014 (JOU limited) | starting rating: 1671 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 115 | Sados, Marcin (1671) | Won 2-0 | +181689 |
| 4sealed | 13 | Berteaux, Julien (1796) | Won 2-1 | +201709 |
| 5sealed | 34 | Alama, Jakub (1594) | Won 2-1 | +161725 |
| 6sealed | 24 | Molle, Niels (1675) | Won 2-1 | +171742 |
| 7sealed | 2 | Sokolowski, Konrad (1862) | Won 0-0 | +201762 |
| 8sealed | 199 | Lehner, Bernhard (1980) | Lost 1-2 | -141748 |
| 9sealed | 215 | Reitbauer, David (1830) | Won 2-0 | +201768 |
| 10draft | 2 | Portaro, Alessandro (1861) | Lost 1-2 | -171751 |
| 11draft | 42 | Rausch, Oliver (1798) | Won 2-1 | +191770 |
| 12draft | 50 | Podbielski, Pawel (1680) | Lost 1-2 | -201750 |
| 13draft | 23 | Szoke, Zoltan (1918) | Won 2-1 | +221772 |
| 14draft | 52 | Ancona, Michele (1773) | Won 2-0 | +181790 |
| 15draft | 9 | Cifka, Stanislav (2090) | Lost 0-2 | -131777 |
| top | average opponent: 1810record: 9-4 | new rating: 1777 | ||
| Grand Prix Prague 2014 (modern) | starting rating: 1671 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 309 | Hlavenka, Juraj (1597) | Won 2-1 | +161687 |
| 4modern | 75 | Kowalski, Grzegorz (1783) | Lost 0-2 | -161671 |
| top | average opponent: 1690record: 1-1 | new rating: 1671 | ||
| Grand Prix Prague 2013 (M14 limited) | starting rating: 1611 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 174 | Canavesi, Daniele (1750) | Won 2-1 | +201631 |
| 4sealed | 156 | Gursinsky, Steffen (1557) | Won 2-1 | +171648 |
| 5sealed | 14 | Skampa, Milan (1613) | Lost 1-2 | -191629 |
| 6sealed | 117 | Steinborn, Robin (1857) | Won 2-1 | +221651 |
| 7sealed | 108 | Hatt, Andras (1508) | Lost 0-2 | -201631 |
| 8sealed | 168 | Bednarik, Richard (1473) | Won 2-0 | +151646 |
| 9sealed | 147 | Pol, Sylvain (1546) | Won 2-0 | +161662 |
| 10draft | 70 | Schneider, Michael (1614) | Won 2-0 | +171679 |
| 11draft | 86 | Dezani, Jeremy (2101) | Lost 0-2 | -111668 |
| 12draft | 67 | Hitz, Michael (1520) | Lost 1-2 | -201648 |
| 13draft | 43 | Poroszkai, Laszlo (1656) | Won 2-0 | +181666 |
| 14draft | 7 | Riffert, Till (1744) | Won 2-1 | +191685 |
| 15draft | 74 | Klocker, Elias (1872) | Lost 1-2 | -141671 |
| top | average opponent: 1678record: 8-5 | new rating: 1671 | ||
| Grand Prix Warsaw 2013 (M14 standard) | starting rating: 1604 | |||
| round | table | opponent (rating) | result | Δrating |
| 4standard | 182 | Suzuki, Ryuuichi (1615) | Won 2-0 | +181622 |
| 5standard | 8 | Blaurock, Matthias (1544) | Lost 0-2 | -191603 |
| 6standard | 110 | Pszczolkowski, Hubert (1518) | Won 2-1 | +161619 |
| 7standard | 106 | Semenov, Petr (1571) | Won 2-0 | +171636 |
| 8standard | 51 | Luff, Andre (1630) | Won 2-1 | +181654 |
| 9standard | 29 | Zaporski, Grzegorz (1589) | Won 2-0 | +171671 |
| 10standard | 22 | Carvalho, Marcio (1998) | Lost 1-2 | -121659 |
| 11standard | 27 | Floch, Ivan (1864) | Lost 1-2 | -151644 |
| 12standard | 59 | Almemo, Fredrik (1516) | Lost 1-2 | -201624 |
| 13standard | 56 | Melin, Elias (1583) | Won 2-1 | +171641 |
| 14standard | 42 | Summersberger, Helmut (1837) | Lost 1-2 | -141627 |
| 15standard | 50 | van Heems, Rogier (1732) | Lost 0-2 | -161611 |
| top | average opponent: 1666record: 6-6 | new rating: 1611 | ||
| Grand Prix Verona 2013 (GTC standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 4standard | 53 | Panzironi, Luca (1500) | Won 2-0 | +181518 |
| 5standard | 24 | Matsoukas, Makis (1675) | Won 2-0 | +211539 |
| 6standard | 30 | Idelfonso, Diony (1495) | Won 2-0 | +171556 |
| 7standard | 10 | Rovito, Edoardo (1542) | Won 2-0 | +181574 |
| 8standard | 11 | Deltour, Louis (1909) | Won 2-1 | +241598 |
| 9standard | 3 | Wald, Piotr (1671) | Lost 0-2 | -171581 |
| 10standard | 10 | Mitchell-Burns, Jack (1616) | Lost 1-2 | -171564 |
| 11standard | 35 | Jansky, David (1611) | Won 2-1 | +191583 |
| 12standard | 23 | Mares, Jiri (1541) | Won 2-0 | +171600 |
| 13standard | 16 | Tampieri, Carlo (1653) | Won 2-0 | +191619 |
| 14standard | 5 | Ragionieri, Filippo (1602) | Lost 0-2 | -191600 |
| 15standard | 15 | Hatto, Steve (1727) | Lost 1-2 | -151585 |
| 16standard | 19 | Vodopyanov, Igor (1641) | Won 2-1 | +191604 |
| top | average opponent: 1630record: 9-4 | new rating: 1604 | ||