Vlach, Josef
Current rating: 1633
Record: 35-28-3
| Grand Prix Prague 2019 (UMA limited) | starting rating: 1582 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 466 | Tuzzolo, Federico (1500) | Won 2-1 | +161598 |
| 2sealed | 430 | Paciocco, Andrea (1601) | Won 2-0 | +181616 |
| 3sealed | 509 | Calzolari, Lorenzo (1575) | Won 2-0 | +171633 |
| 4sealed | 127 | Janzer, Marcel (1734) | Draw 1-1 | +21635 |
| 5sealed | 138 | Paragi, Zoltan (1594) | Won 2-1 | +181653 |
| 6sealed | 71 | Oostveen, Victor (1584) | Won 2-0 | +161669 |
| 7sealed | 32 | Varga, Tomas (1731) | Lost 0-2 | -171652 |
| 8sealed | 119 | Haas, Julian (1593) | Lost 0-2 | -191633 |
| top | average opponent: 1614record: 5-2-1 | new rating: 1633 | ||
| Grand Prix Prague 2017 (AER limited) | starting rating: 1616 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 276 | Connan, Argan (1506) | Lost 0-2 | -201596 |
| 3sealed | 675 | Grund, Florian (1662) | Won 2-0 | +191615 |
| 4sealed | 533 | Steiner, Alexander (1515) | Lost 0-2 | -201595 |
| 5sealed | 544 | Tetera, Filip (1533) | Won 2-1 | +171612 |
| 6sealed | 466 | Linkes, Juraj (1563) | Won 2-1 | +171629 |
| 7sealed | 299 | Levy, Olivier (1917) | Lost 1-2 | -131616 |
| 8sealed | 372 | Leroy, Yannick (1753) | Lost 1-2 | -151601 |
| 9sealed | 443 | Queralt Martin, Albert (1529) | Lost 1-2 | -191582 |
| top | average opponent: 1622record: 3-5 | new rating: 1582 | ||
| Grand Prix Prague 2015 (ORI standard) | starting rating: 1604 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 168 | Ferguson, Marc (1573) | Lost 1-2 | -191585 |
| 4standard | 436 | Kouffeld, Michael (1504) | Lost 0-2 | -191566 |
| 5standard | 546 | Konopko, Lukasz (1417) | Won 2-0 | +151581 |
| 6standard | 288 | Vrana, Michal (1522) | Won 2-0 | +171598 |
| 7standard | 280 | Del Nero, Stefano (1757) | Won 2-0 | +211619 |
| 8standard | 159 | Scibor-Rylski, Michal (1519) | Won 2-1 | +161635 |
| 9standard | 77 | Cascella, Tommaso (1574) | Lost 1-2 | -191616 |
| top | average opponent: 1552record: 4-3 | new rating: 1616 | ||
| Grand Prix Prague 2014 (modern) | starting rating: 1634 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 166 | Gerth, Christopher (1562) | Won 2-0 | +171651 |
| 4modern | 135 | Weber, Patrick (1495) | Lost 0-2 | -211630 |
| 5modern | 178 | Clemente, Luca (1610) | Lost 0-2 | -181612 |
| 6modern | 364 | Bjorklund, Charles (1475) | Draw 1-1 | -31609 |
| 7modern | 327 | Cooman, Andy (1584) | Won 2-0 | +181627 |
| 8modern | 237 | Heinemann, Stefan (1466) | Draw 1-1 | -31624 |
| 9modern | 257 | Cislaghi, Giacomo (1517) | Lost 0-2 | -201604 |
| top | average opponent: 1530record: 2-3-2 | new rating: 1604 | ||
| Grand Prix Prague 2013 (M14 limited) | starting rating: 1513 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 257 | Bueschgens, Manuel (1574) | Won 2-1 | +191532 |
| 3sealed | 376 | Versari, Matteo (1837) | Won 2-1 | +241556 |
| 4sealed | 3 | Zalusky, Dominik (1556) | Lost 1-2 | -181538 |
| 5sealed | 215 | Bieniek, Lukasz (1537) | Won 2-0 | +181556 |
| 6sealed | 77 | Radloff, Tobias (1596) | Lost 0-2 | -171539 |
| 7sealed | 245 | Reil, Christian (1502) | Won 2-1 | +171556 |
| 8sealed | 175 | Heigerer, Stefan (1696) | Won 2-1 | +201576 |
| 9sealed | 150 | Kistler, Martin (1535) | Won 2-0 | +181594 |
| 10draft | 78 | Asubaev, Amir (1674) | Won 2-0 | +191613 |
| 11draft | 71 | Berze, Richard (1659) | Won 2-0 | +191632 |
| 12draft | 23 | Enduraev, Pavel (1674) | Lost 0-2 | -171615 |
| 13draft | 62 | Stuckler, Thomas (1683) | Won 2-1 | +191634 |
| 14draft | 52 | Gross, Moritz (1608) | Lost 0-2 | -191615 |
| 15draft | 19 | Salvade, Luca (1652) | Won 2-0 | +191634 |
| top | average opponent: 1627record: 10-4 | new rating: 1634 | ||
| Grand Prix Prague 2011 (NPH limited) | starting rating: 1551 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 512 | Schmuck, Maximilian (1485) | Lost 1-2 | -191532 |
| 3sealed | 647 | Cepl, Jaroslav (1514) | Lost 0-2 | -191513 |
| top | average opponent: 1499record: 0-2 | new rating: 1513 | ||
| Grand Prix Prague 2009 (M10 limited) | starting rating: 1545 | |||
| round | table | opponent (rating) | result | Δrating |
| 4sealed | 63 | Bannwinkler, Benjamin (1430) | Lost 0-2 | -201525 |
| 5sealed | 123 | Janik, Maciej (1518) | Won 2-0 | +181543 |
| 6sealed | 49 | Polasek, Filip (1641) | Lost 1-2 | -161527 |
| 7sealed | 122 | Meertens, Job (1617) | Won 2-1 | +191546 |
| 8sealed | 110 | Jacob, Jeremie (1561) | Won 2-0 | +191565 |
| 9sealed | 73 | Bohny, Nico (1798) | Lost 1-2 | -141551 |
| top | average opponent: 1594record: 3-3 | new rating: 1551 | ||
| Grand Prix Prague 2003 (LGN limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 76 | Hassler, Oliver (1246) | Won 2-1 | +131513 |
| 2sealed | 80 | Bartik, Martin (1517) | Won 2-1 | +191532 |
| 3sealed | 31 | Lebeda, Jiri (1535) | Won 2-0 | +181550 |
| 4sealed | 54 | Wiegersma, Jelger (1992) | Lost 0-2 | -111539 |
| 5sealed | 153 | Smutek, Juergen (1528) | Won 2-0 | +181557 |
| 6sealed | 96 | Zidek, Arnost (1531) | Won 2-1 | +171574 |
| 7sealed | 55 | Bezdomnikov, David (1575) | Won 2-0 | +181592 |
| 8sealed | 20 | Horemans, Michiel (1583) | Won 2-0 | +181610 |
| 9sealed | 10 | Mazzurco, Carlo (1647) | ID | 01610 |
| 10draft | 4 | Bayer, Patrick (1681) | Lost 0-2 | -161594 |
| 11draft | 16 | Loeb, Davy (1654) | Won 2-0 | +191613 |
| 12draft | 13 | Heeswijk, Roel (1632) | Lost 0-2 | -181595 |
| 13draft | 16 | Hajnisz, Aleksander (1675) | Lost 1-2 | -161579 |
| 14draft | 10 | Canavesi, Emanuele (1634) | Lost 0-2 | -171562 |
| 15draft | 15 | Kruschel, Andreas (1652) | Lost 1-2 | -171545 |
| top | average opponent: 1605record: 8-6-1 | new rating: 1545 | ||