Gierszewski, Piotr
Current rating: 1768 (#3169)
Record: 51-35
| Grand Prix Warsaw 2017 (XLN standard) | starting rating: 1644 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 102 | Janotta, Timo (1610) | Won 2-0 | +171661 |
| 2standard | 171 | Benczedi, Jozsef (1822) | Won 2-0 | +211682 |
| 3standard | 257 | Jonsson, Markus (1410) | Won 2-1 | +131695 |
| 4standard | 63 | Michalczuk, Piotr (1548) | Won 2-1 | +161711 |
| 5standard | 57 | Jonsson, Peter (1659) | Won 2-1 | +171728 |
| 6standard | 35 | Berteaux, Julien (1870) | Won 2-0 | +201748 |
| 7standard | 11 | Busquets, Joan (1633) | Won 2-1 | +161764 |
| 8standard | 1 | Privalov, Alexander (1856) | Lost 0-2 | -161748 |
| 9standard | 7 | Passaris, Nikolaos (1646) | Won 2-1 | +161764 |
| 10standard | 16 | Tochacek, Daniel (1766) | Won 2-1 | +181782 |
| 11standard | 9 | Kowalski, Grzegorz (2040) | Lost 1-2 | -131769 |
| 12standard | 22 | Dagen, Pierre (1982) | Lost 1-2 | -141755 |
| 13standard | 22 | Lotan, Raz (1696) | Lost 0-2 | -191736 |
| 14standard | 45 | Schwarz, Christian (1577) | Won 2-0 | +151751 |
| 15standard | 39 | D'Elia, Gerardo (1720) | Won 2-1 | +171768 |
| top | average opponent: 1722record: 11-4 | new rating: 1768 | ||
| Grand Prix Prague 2017 (AER limited) | starting rating: 1627 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 574 | Van Eeghen, Elmer (1914) | Won 2-0 | +241651 |
| 2sealed | 354 | Rosette, Michael (1677) | Won 2-1 | +181669 |
| 3sealed | 232 | Olsen, Andreas (1535) | Lost 0-2 | -201649 |
| 4sealed | 341 | Schraut, Andreas (1716) | Lost 0-2 | -171632 |
| 5sealed | 505 | Zornan, Martin (1465) | Won 2-1 | +151647 |
| 6sealed | 299 | Duve, Tom (1461) | Won 2-1 | +141661 |
| 7sealed | 327 | Bouillot, Damien (1833) | Lost 1-2 | -141647 |
| 8sealed | 382 | Thiele, Fabian (1696) | Lost 1-2 | -181629 |
| 9sealed | 503 | Essl, Bernhard (1439) | Won 2-0 | +151644 |
| top | average opponent: 1637record: 5-4 | new rating: 1644 | ||
| Grand Prix Warsaw 2016 (KLD standard) | starting rating: 1622 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 28 | Volker, Dominik (1430) | Won 2-0 | +141636 |
| 2standard | 155 | Brzezinski, Michal (1500) | Won 2-1 | +161652 |
| 3standard | 190 | Petrusic, Stjepko (1616) | Won 2-0 | +171669 |
| 4standard | 27 | Fuecker, Niklas (1562) | Lost 0-2 | -201649 |
| 5standard | 219 | Henry, Julien (1717) | Lost 1-2 | -171632 |
| 6standard | 299 | Schuette, Soeren (1564) | Won 2-0 | +171649 |
| 7standard | 162 | Glasner, Richard (1732) | Lost 1-2 | -161633 |
| 8standard | 243 | Izotau, Anton (1509) | Won 2-0 | +151648 |
| 9standard | 221 | Winiarski, Piotr (1489) | Lost 0-2 | -211627 |
| top | average opponent: 1569record: 5-4 | new rating: 1627 | ||
| Grand Prix Bologna 2016 (modern) | starting rating: 1562 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 458 | Caron, Jean Marc (1482) | Lost 1-2 | -201542 |
| 4modern | 445 | Simonetta, Andrea (1499) | Won 2-0 | +181560 |
| 5modern | 204 | Verburg, Joost (1636) | Won 2-1 | +191579 |
| 6modern | 84 | Costantino, Francesco (1532) | Won 2-0 | +171596 |
| 7modern | 154 | Perez Romera, Daniel (1632) | Won 2-0 | +191615 |
| 8modern | 35 | Colantoni, Giorgio (1556) | Won 2-0 | +171632 |
| 9modern | 59 | Carvalho, Marcio (2027) | Lost 0-2 | -111621 |
| 10modern | 88 | Hlavac, Miroslav (1606) | Won 2-1 | +171638 |
| 11modern | 62 | Caminada, Francesco (1530) | Lost 1-2 | -201618 |
| 12modern | 101 | Decker, Fabian (1606) | Won 2-0 | +181636 |
| 13modern | 77 | Paciocco, Andrea (1643) | Lost 0-2 | -181618 |
| 14modern | 106 | Paco Abenoza, Aria (1656) | Won 2-1 | +191637 |
| 15modern | 56 | Wall, Oskar (1784) | Lost 0-2 | -151622 |
| top | average opponent: 1630record: 8-5 | new rating: 1622 | ||
| Grand Prix Krakow 2015 (DTK standard) | starting rating: 1610 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 67 | Klimov, Nikita (1500) | Lost 1-2 | -201590 |
| 2standard | 330 | Gehrts, Bruno Regis Heino (1384) | Won 2-0 | +151605 |
| 3standard | 451 | Kowarzyk, Marta (1471) | Won 2-0 | +151620 |
| 4standard | 247 | Lysek, Andrzej (1670) | Lost 1-2 | -171603 |
| 5standard | 300 | Polkowski, Grzegorz (1446) | Lost 1-2 | -211582 |
| 6standard | 419 | Redzikowski, Maciej (1454) | Lost 0-2 | -201562 |
| top | average opponent: 1488record: 2-4 | new rating: 1562 | ||
| Grand Prix Warsaw 2014 (JOU limited) | starting rating: 1600 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 184 | Olak, Dominik (1476) | Won 2-0 | +151615 |
| 2sealed | 199 | Kupinski, Krzysztof (1522) | Lost 0-2 | -191596 |
| 3sealed | 300 | Wieczorek, Konrad (1537) | Won 2-0 | +171613 |
| 4sealed | 258 | Geiger, Juergen (1714) | Lost 1-2 | -161597 |
| 5sealed | 362 | Domagalski, Tomasz (1472) | Won 2-1 | +151612 |
| 6sealed | 271 | Swiader, Artur (1453) | Won 2-1 | +151627 |
| 7sealed | 181 | Brandtner, Michael (1673) | Lost 0-0 | -171610 |
| top | average opponent: 1550record: 4-3 | new rating: 1610 | ||
| Grand Prix Prague 2009 (M10 limited) | starting rating: 1546 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 669 | Llano, Enrique (1658) | Won 2-1 | +201566 |
| 2sealed | 664 | Kosicka, Tomas (1579) | Won 2-0 | +181584 |
| 3sealed | 548 | Matuszewski, Hubert (1549) | Won 2-1 | +171601 |
| 4sealed | 541 | Pruchniewicz, Jan (1553) | Lost 0-2 | -191582 |
| 5sealed | 637 | Vieren, Peter (1772) | Won 2-1 | +221604 |
| 6sealed | 567 | Sato, Rei (1665) | Won 2-1 | +191623 |
| 7sealed | 550 | Zinovjevas, Arturas (1554) | Lost 0-2 | -191604 |
| 8sealed | 566 | Gotlib, Nathan (1480) | Lost 1-2 | -201584 |
| 9sealed | 602 | Florijn, Peter (1486) | Won 2-1 | +161600 |
| top | average opponent: 1589record: 6-3 | new rating: 1600 | ||
| Grand Prix Copenhagen 2008 (EVE standard) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 144 | Osbjer, Johan (1542) | Won 2-0 | +191501 |
| 2standard | 75 | Zatorski, Lukasz (1418) | Won 2-1 | +171518 |
| 3standard | 7 | Kogler, Stefan (1572) | Lost 1-2 | -171501 |
| 4standard | 140 | Hedman, Anders (1517) | Won 2-0 | +181519 |
| 5standard | 60 | Bastos, Frederico (1562) | Won 2-0 | +191538 |
| 6standard | 54 | Kocsis, Gabor (1791) | Won 2-0 | +221560 |
| 7standard | 53 | Juergens, Dorian (1683) | Won 2-0 | +211581 |
| 8standard | 26 | Skold, Oskar (1594) | Lost 1-2 | -181563 |
| 9standard | 42 | Janak, Tomas (1611) | Lost 0-2 | -171546 |
| top | average opponent: 1588record: 6-3 | new rating: 1546 | ||
| Grand Prix Krakow 2007 (LRW standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 528 | Schwendinger, Christian (1504) | Won 2-0 | +181518 |
| 2standard | 555 | Hloska, Martin (1501) | Won 2-0 | +181536 |
| 3standard | 545 | Bokor, Peter (1453) | Lost 0-2 | -201516 |
| 4standard | 603 | Surynek, Tomas T (1464) | Lost 0-2 | -191497 |
| 5standard | 610 | Isaev, Andrey (1501) | Won 2-0 | +181515 |
| 6standard | 607 | Melichar, Martin (1659) | Lost 0-2 | -151500 |
| 7standard | 633 | Dostal, Roman (1500) | Lost 1-2 | -181482 |
| 8standard | 629 | Faber, Manuel (1497) | Won 2-0 | +181500 |
| 9standard | 600 | Grottel, Jan (1499) | Lost 0-2 | -181482 |
| top | average opponent: 1508record: 4-5 | new rating: 1482 | ||