Porostly, Petr
Current rating: 1718 (#5419)
Record: 37-28-2
| Grand Prix Prague 2014 (modern) | starting rating: 1683 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 134 | Mann, Rico (1519) | Won 2-0 | +151698 |
| 3modern | 264 | Falconetti, Matteo (1605) | Lost 0-2 | -201678 |
| 4modern | 286 | Rehmann, Daniel (1405) | Draw 1-1 | -51673 |
| 5modern | 326 | Gast, Andy (1516) | Won 2-0 | +151688 |
| 6modern | 419 | Kourimsky, Marek (1547) | Lost 1-2 | -201668 |
| 7modern | 323 | Reissenberger, Marcus (1511) | Won 2-0 | +151683 |
| 8modern | 31 | Lebeda, Tomas (1665) | Won 2-0 | +181701 |
| 9modern | 151 | Mar, Tomas (1651) | Won 2-0 | +171718 |
| top | average opponent: 1552record: 5-2-1 | new rating: 1718 | ||
| Grand Prix Prague 2013 (M14 limited) | starting rating: 1582 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 115 | Poldsam, Ismo (1577) | Lost 1-2 | -181564 |
| 4sealed | 313 | Rozza, Luca (1485) | Won 2-0 | +161580 |
| 5sealed | 260 | Melisek, David (1529) | Won 2-1 | +171597 |
| 6sealed | 65 | Paolucci, Matteo (1721) | Won 2-0 | +201617 |
| 7sealed | 55 | Zeizinger, Lukas (1601) | Won 2-0 | +181635 |
| 8sealed | 75 | Drapala, Thomas (1782) | Won 2-0 | +211656 |
| 9sealed | 28 | Leterme, Benoit (1655) | Won 2-0 | +181674 |
| 10draft | 40 | Lesaege, Clement (1811) | Lost 0-2 | -161658 |
| 11draft | 59 | Erenyi, Jakub (1754) | Won 2-1 | +201678 |
| 12draft | 37 | Levy, Raphael (1981) | Lost 1-2 | -131665 |
| 13draft | 17 | Forslund, Fredrik (1502) | Won 2-1 | +151680 |
| 14draft | 59 | Klocker, Elias (1858) | Lost 0-2 | -141666 |
| 15draft | 52 | Traviglia, Jacopo (1615) | Won 2-0 | +171683 |
| top | average opponent: 1682record: 9-4 | new rating: 1683 | ||
| Grand Prix London 2013 (GTC limited) | starting rating: 1550 | |||
| round | table | opponent (rating) | result | Δrating |
| 4sealed | 96 | Sebela, Antonin (1574) | Won 2-0 | +181568 |
| 5sealed | 27 | Skandaliaris, Nikos (1557) | Won 2-1 | +181586 |
| 6sealed | 50 | Flis, Grzegorz (1699) | Won 2-0 | +201606 |
| 7sealed | 4 | Gilligan, Daniel (1662) | Draw 1-1 | +11607 |
| 8sealed | 24 | Rosada, Adrian (1836) | Lost 1-2 | -141593 |
| 9sealed | 60 | Canavesi, Daniele (1948) | Lost 0-2 | -111582 |
| top | average opponent: 1713record: 3-2-1 | new rating: 1582 | ||
| Grand Prix Lisbon 2012 (RTR limited) | starting rating: 1544 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 6 | Beijerink, Pablo (1533) | Lost 0-2 | -181526 |
| 3sealed | 218 | Marti, Enric (1751) | Lost 1-2 | -141512 |
| 4sealed | 250 | Silva, Hugo (1466) | Won 2-0 | +171529 |
| 5sealed | 231 | Oliveira, Samuel (1500) | Won 2-0 | +171546 |
| 6sealed | 170 | Schmidt, Daniel (1521) | Won 2-1 | +181564 |
| 7sealed | 138 | Inerot, Niclas (1447) | Won 2-1 | +161580 |
| 8sealed | 56 | Canavesi, Daniele (1850) | Lost 1-2 | -131567 |
| 9sealed | 79 | Larsen, Soren (1648) | Lost 0-2 | -171550 |
| top | average opponent: 1590record: 4-4 | new rating: 1550 | ||
| Grand Prix Bochum 2010 (SOM limited) | starting rating: 1582 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 553 | Moorman, Rick (1470) | Lost 0-2 | -201562 |
| 3sealed | 788 | Attlfellner, Stefan (1550) | Lost 0-2 | -181544 |
| top | average opponent: 1510record: 0-2 | new rating: 1544 | ||
| Grand Prix Hanover 2009 (extended) | starting rating: 1475 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 18 | Surynek, Tomas T (1593) | Won 2-1 | +201495 |
| 3extended | 78 | Drewes, David (1411) | Won 2-0 | +161511 |
| 4extended | 53 | Willems, Sjoerd (1745) | Won 0-0 | +221533 |
| 5extended | 2 | Eckschlager, Markus (1573) | Won 2-1 | +191552 |
| 6extended | 1 | Ruiz, Carlos [ESP] (1566) | Lost 0-2 | -181534 |
| 7extended | 30 | Porojan, Raul (1852) | Won 2-1 | +241558 |
| 8extended | 10 | Schmidt, Jan (1618) | Won 2-0 | +191577 |
| 9extended | 7 | Jell, Philipp (1653) | Won 2-1 | +191596 |
| 10extended | 6 | Gregoir, Christophe (1771) | Lost 1-2 | -141582 |
| 11extended | 19 | Chiarel, Federico (1631) | Lost 0-2 | -171565 |
| 12extended | 39 | Schultz-Nielsen, Martin (1580) | Lost 0-2 | -181547 |
| 13extended | 50 | Charvat, Jiri (1390) | Won 2-0 | +151562 |
| 14extended | 36 | Schulmerich, Felix (1679) | Won 2-1 | +201582 |
| 15extended | 29 | Vavra, Nikola (1690) | ID | 01582 |
| top | average opponent: 1625record: 9-4-1 | new rating: 1582 | ||
| Grand Prix Vienna 2008 (extended) | starting rating: 1497 | |||
| round | table | opponent (rating) | result | Δrating |
| 4extended | 39 | Fischer, Stefan (1778) | Lost 0-2 | -131484 |
| 5extended | 58 | Cerofolini, Lorenzo (1546) | Won 2-0 | +191503 |
| 6extended | 23 | Corbera Bellalta, Marc (1645) | Lost 0-2 | -151488 |
| 7extended | 98 | Jaeger, Jens (1523) | Lost 1-2 | -171471 |
| 8extended | 114 | Klemm, Matthis (1542) | Won 2-1 | +191490 |
| 9extended | 79 | Loeb, Davy (1635) | Lost 1-2 | -151475 |
| top | average opponent: 1612record: 2-4 | new rating: 1475 | ||
| Grand Prix Krakow 2007 (LRW standard) | starting rating: 1521 | |||
| round | table | opponent (rating) | result | Δrating |
| 4standard | 504 | Magri, Saverio (1666) | Lost 0-2 | -161505 |
| 5standard | 574 | Bucher, Manuel (1727) | Lost 1-2 | -141491 |
| 6standard | 578 | Abramczyk, Patryk (1521) | Won 2-1 | +191510 |
| 7standard | 548 | Lemoine, Vincent (1823) | Lost 1-2 | -131497 |
| top | average opponent: 1684record: 1-3 | new rating: 1497 | ||
| Grand Prix Stockholm 2007 (FUT limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 96 | Hasslar, Goran (1500) | Won 2-0 | +181518 |
| 2sealed | 142 | Persson, Fredrik (1517) | Lost 0-2 | -181500 |
| 3sealed | 153 | Gudbrandsson, Geir (1632) | Lost 1-2 | -161484 |
| 4sealed | 321 | Marcel, Sascha Oliver (1482) | Won 2-1 | +181502 |
| 5sealed | 217 | Kallstro, Markus M (1500) | Won 2-0 | +181520 |
| 6sealed | 192 | Wernecke, Andreas (1519) | Won 2-1 | +181538 |
| 7sealed | 81 | Wechsel, Alexander (1560) | Lost 0-0 | -171521 |
| top | average opponent: 1530record: 4-3 | new rating: 1521 | ||