Vapenik, Karel
Current rating: 1416
Record: 24-33-3
| Grand Prix Prague 2019 (UMA limited) | starting rating: 1443 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 739 | Morth, Florian (1500) | Lost 0-2 | -171426 |
| 2sealed | 1380 | Robinson, Frank (1636) | Won 2-0 | +221448 |
| 3sealed | 1000 | Paciocco, Andrea (1583) | Lost 0-2 | -161432 |
| 4sealed | 820 | Vondracek, Zdenek (1503) | Lost 0-2 | -161416 |
| top | average opponent: 1555record: 1-3 | new rating: 1416 | ||
| Grand Prix Copenhagen 2017 (modern) | starting rating: 1434 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 38 | Snellingen, Simen (1543) | Won 2-1 | +201454 |
| 3modern | 192 | Kromann, Christian (1500) | Lost 1-2 | -181436 |
| 4modern | 487 | Lygre Hoff, Stale (1513) | Lost 1-2 | -161420 |
| 5modern | 625 | Berg, Magnus (1478) | Won 2-1 | +191439 |
| 6modern | 547 | De Zeeuw, Donald (1434) | Lost 0-2 | -181421 |
| 7modern | 516 | Bjerknes, Erik (1501) | Won 2-1 | +191440 |
| 8modern | 496 | Jonassen, Thomas Vink (1469) | Won 2-0 | +191459 |
| 9modern | 351 | Thomsen, Asger Ehrenreich (1587) | Lost 1-2 | -161443 |
| top | average opponent: 1503record: 4-4 | new rating: 1443 | ||
| Grand Prix Prague 2017 (AER limited) | starting rating: 1480 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 134 | Robertson, Stephen (1600) | Lost 1-2 | -161464 |
| 3sealed | 483 | Kulesza, Damian (1472) | Won 2-0 | +181482 |
| 4sealed | 453 | Minin, Andrey (1523) | Lost 1-2 | -171465 |
| 5sealed | 564 | Van Heck, Ruben (1521) | Lost 1-2 | -171448 |
| 6sealed | 680 | Mauguin, Thomas (1650) | Lost 0-2 | -141434 |
| top | average opponent: 1553record: 1-4 | new rating: 1434 | ||
| Grand Prix Prague 2016 (legacy) | starting rating: 1509 | |||
| round | table | opponent (rating) | result | Δrating |
| 3legacy | 209 | Bohm, Philip (1429) | Won 2-1 | +161525 |
| 4legacy | 46 | Vlcek, Tomas (1697) | Lost 1-2 | -151510 |
| 5legacy | 190 | Pchelkin, Andrey (1607) | Lost 0-2 | -161494 |
| 6legacy | 295 | Kaukoranta, Ville (1659) | Lost 0-2 | -151479 |
| 7legacy | 378 | Feher, Attila (1528) | Won 2-1 | +191498 |
| 8legacy | 301 | Bochmann, Michael (1499) | Lost 1-2 | -181480 |
| top | average opponent: 1570record: 2-4 | new rating: 1480 | ||
| Grand Prix Prague 2015 (ORI standard) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 351 | Almadi, Balazs (1500) | Won 2-0 | +181500 |
| 2standard | 252 | Kowarzyk, Marta (1440) | Lost 0-2 | -191481 |
| 3standard | 559 | Gerbersdorf, Viktor (1724) | Lost 1-2 | -131468 |
| 4standard | 639 | van de Noort, Tim (1477) | Won 2-0 | +181486 |
| 5standard | 440 | Kleiner, Sebastian (1647) | Won 2-0 | +211507 |
| 6standard | 406 | Swierczynski, Michal (1598) | Lost 1-2 | -171490 |
| 7standard | 362 | Popescu, Tiberiu (1441) | Won 2-0 | +171507 |
| 8standard | 280 | Grabnar, Tomaz (1560) | Lost 0-2 | -171490 |
| 9standard | 271 | Ray, Stephane (1502) | Won 2-0 | +191509 |
| top | average opponent: 1543record: 5-4 | new rating: 1509 | ||
| Grand Prix Copenhagen 2015 (modern) | starting rating: 1450 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 264 | Friis, Jacob (1452) | Lost 1-2 | -181432 |
| 2modern | 349 | Dreier, Soren (1483) | Lost 0-2 | -171415 |
| 3modern | 597 | Olesen, Casper Maersk (1465) | Won 2-0 | +191434 |
| 4modern | 505 | Larsen, Marie (1482) | Won 2-0 | +191453 |
| 5modern | 493 | Flaatten, Dan Espen (1509) | Won 2-0 | +191472 |
| 6modern | 244 | Patel, Kayure (1679) | Won 2-0 | +221494 |
| 7modern | 278 | Hjembaek, Jesper (1672) | Lost 0-2 | -151479 |
| 8modern | 280 | Knab, Julian (1634) | Lost 0-2 | -151464 |
| 9modern | 237 | Partinen, Simo (1468) | Won 2-0 | +181482 |
| top | average opponent: 1538record: 5-4 | new rating: 1482 | ||
| Grand Prix Prague 2011 (NPH limited) | starting rating: 1417 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 571 | Breit, Bernhard (1750) | Lost 1-2 | -121405 |
| 2sealed | 711 | Soukupova, Petra (1498) | Draw 1-1 | +11406 |
| 3sealed | 724 | Kalamarz, Lukasz (1485) | Won 2-1 | +201426 |
| 4sealed | 686 | Oswald, Radek (1504) | Won 2-1 | +191445 |
| 5sealed | 631 | Kostal, Zdenek (1518) | Won 2-0 | +191464 |
| 6sealed | 585 | Longoni, Raphael (1684) | Lost 0-2 | -141450 |
| top | average opponent: 1573record: 3-2-1 | new rating: 1450 | ||
| Grand Prix Prague 2009 (M10 limited) | starting rating: 1448 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 18 | Cekal, Jakub (1500) | Won 2-1 | +181466 |
| 2sealed | 44 | Goerres, Falko (1455) | Lost 0-2 | -181448 |
| 3sealed | 242 | Kec, Miroslav (1501) | Lost 0-2 | -171431 |
| 4sealed | 323 | Slavik, Radovan (1481) | Lost 0-2 | -171414 |
| 5sealed | 308 | Kolar, Pavel (1464) | Won 2-0 | +191433 |
| 6sealed | 257 | Opata, Jan (1482) | Draw 1-1 | +11434 |
| 7sealed | 214 | Sofinski, Patryk (1477) | Lost 1-2 | -171417 |
| top | average opponent: 1480record: 2-4-1 | new rating: 1417 | ||
| Grand Prix Vienna 2008 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 159 | Rickards, Daniel (1522) | Draw 1-1 | 01500 |
| 2extended | 149 | Soyka, Paul (1500) | Won 2-0 | +181518 |
| 3extended | 103 | Skrbec, Ziga (1575) | Lost 0-2 | -171501 |
| 4extended | 196 | Greil, Alexander (1500) | Lost 1-2 | -181483 |
| 5extended | 227 | Bertinelli, Riccardo (1466) | Lost 0-2 | -181465 |
| 6extended | 222 | Pilat, Rikus (1490) | Lost 0-2 | -171448 |
| top | average opponent: 1509record: 1-4-1 | new rating: 1448 | ||