Bocak, Petr
Current rating: 1428
Record: 15-22-1
| Grand Prix Atlanta 2019 (legacy) | starting rating: 1372 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 260 | Mcclure, Sean (1500) | Won 2-0 | +211393 |
| 2legacy | 6 | Werner, Nicholas (1646) | Lost 0-2 | -141379 |
| 3legacy | 277 | Gottfried, Jacob (1593) | Lost 0-2 | -141365 |
| 4legacy | 432 | Larsen, Albert (1406) | Won 2-0 | +191384 |
| 5legacy | 259 | Riggs, Matthew (1581) | Lost 1-2 | -151369 |
| 6legacy | 318 | Salzberg, Benjamin (1431) | Won 2-0 | +191388 |
| 7legacy | 283 | Beard, Shane (1462) | Won 2-0 | +201408 |
| 8legacy | 165 | Borges, David (1512) | Won 2-1 | +201428 |
| top | average opponent: 1516record: 5-3 | new rating: 1428 | ||
| Grand Prix Prague 2016 (legacy) | starting rating: 1418 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 107 | Jahn, Stephan (1500) | Lost 1-2 | -171401 |
| 2legacy | 523 | Schweighofer, Daniel (1469) | Lost 0-2 | -161385 |
| 3legacy | 629 | Thorsted, Rasmus (1465) | Won 2-0 | +191404 |
| 4legacy | 575 | Laub, Niclas (1486) | Lost 0-2 | -161388 |
| 5legacy | 661 | Ponikelsky, Jiri (1461) | Won 2-0 | +191407 |
| 6legacy | 581 | Holmquist, Anders (1486) | Lost 0-2 | -171390 |
| 7legacy | 529 | Van Hove, Joris (1388) | Lost 0-2 | -181372 |
| top | average opponent: 1465record: 2-5 | new rating: 1372 | ||
| Grand Prix Amsterdam 2011 (legacy) | starting rating: 1467 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 860 | Boere, Joren (1533) | Lost 1-2 | -171450 |
| 2legacy | 858 | Hausmann, Sebastian (1365) | Lost 1-2 | -191431 |
| 3legacy | 948 | Chapelle, Sebastien (1484) | Won 2-1 | +191450 |
| 4legacy | 938 | Ginter, Markus (1524) | Won 2-0 | +191469 |
| 5legacy | 838 | Heggo, Even (1554) | Lost 0-2 | -161453 |
| 6legacy | 910 | Vesely, Tomas (1401) | Lost 1-2 | -191434 |
| 7legacy | 901 | Varady, Balazs (1557) | Lost 0-2 | -161418 |
| top | average opponent: 1488record: 2-5 | new rating: 1418 | ||
| Grand Prix Paris 2008 (ALA limited) | starting rating: 1460 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 191 | Awielien, Jubault (1500) | Won 2-0 | +191479 |
| 2sealed | 52 | Youssef, Younes (1552) | Won 2-0 | +191498 |
| 3sealed | 80 | Bellamy, Gregory (1536) | Lost 0-2 | -171481 |
| 4sealed | 276 | Saenz de Urturi, Alejandro (1585) | Won 2-1 | +191500 |
| 5sealed | 125 | Plagge, Julian (1481) | Lost 1-2 | -181482 |
| 6sealed | 212 | Lamy, Jerome (1651) | Lost 0-2 | -151467 |
| top | average opponent: 1551record: 3-3 | new rating: 1467 | ||
| Grand Prix Vienna 2008 (extended) | starting rating: 1472 | |||
| round | table | opponent (rating) | result | Δrating |
| 4extended | 59 | Schiano, Diego (1452) | Lost 0-2 | -181454 |
| 5extended | 59 | Heigl, Franz (1519) | Won 2-0 | +191473 |
| 6extended | 37 | Kofler, Kurt (1632) | Draw 1-1 | +31476 |
| 7extended | 50 | Penko, Matic (1588) | Lost 0-2 | -161460 |
| top | average opponent: 1548record: 1-2-1 | new rating: 1460 | ||
| Grand Prix Krakow 2007 (LRW standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 46 | Mygh, Sebastian (1597) | Won 2-0 | +201520 |
| 4standard | 47 | Renevier, Jerome (1545) | Lost 1-2 | -181502 |
| 5standard | 67 | Jautakis, Andrius (1665) | Won 2-1 | +211523 |
| 6standard | 20 | Kadavy, Petr (1631) | Lost 1-2 | -161507 |
| 7standard | 50 | Lubarr, Robin (1522) | Lost 1-2 | -181489 |
| 8standard | 90 | Bitner, Krzysztof (1523) | Lost 0-2 | -171472 |
| top | average opponent: 1581record: 2-4 | new rating: 1472 | ||