Volker, Jan
Current rating: 1449
| Grand Prix Copenhagen 2019 (MH1 limited) | starting rating: 1489 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 281 | Orekhanov, Dmitrii (1500) | Lost 0-2 | -181471 |
| 2sealed | 346 | Fossberg, Marc (1393) | Lost 0-2 | -191452 |
| 3sealed | 613 | Okkerstrom, Claus (1473) | Won 2-0 | +181470 |
| 4sealed | 489 | Archer, Julien (1309) | Lost 1-2 | -211449 |
| top | average opponent: 1419record: 1-3 | new rating: 1449 | ||
| Grand Prix Bologna 2017 (AKH limited) | starting rating: 1527 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 326 | Schrag, Yann (1500) | Lost 0-2 | -181509 |
| 2sealed | 462 | Sciale, Francesco (1481) | Lost 1-2 | -191490 |
| 3sealed | 730 | Ruggeri, Luca (1463) | Won 2-0 | +181508 |
| 4sealed | 732 | Passerini, Andrea (1355) | Won 2-1 | +151523 |
| 5sealed | 513 | Ben Aribi, Fathi (1620) | Lost 1-2 | -161507 |
| 6sealed | 690 | Mestroni, Stefano (1501) | Lost 1-2 | -181489 |
| top | average opponent: 1487record: 2-4 | new rating: 1489 | ||
| Grand Prix Prague 2017 (AER limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 526 | Urban, Tamas (1699) | Lost 1-2 | -141486 |
| 2sealed | 542 | Hoerbinger, Daniel (1438) | Lost 0-2 | -191467 |
| 3sealed | 940 | Irons, Nancy (1407) | Won 2-1 | +171484 |
| 4sealed | 695 | Vojta, David (1570) | Won 2-1 | +191503 |
| 5sealed | 743 | Kanibolotska, Kateryna (1497) | Won 2-0 | +181521 |
| 6sealed | 569 | Kovarik, Ondrej (1476) | Won 2-0 | +171538 |
| 7sealed | 337 | Tozzo, Nicolas (1484) | Won 2-1 | +171555 |
| 8sealed | 263 | Wiktorzak, Piotr (1657) | Won 2-0 | +201575 |
| 9sealed | 122 | Vejdelek, Roman (1631) | Lost 1-2 | -171558 |
| 10draft | 64 | Marenz, Daniel (1664) | Lost 0-2 | -161542 |
| 11draft | 192 | Vanek, Jiri (1731) | Lost 0-2 | -151527 |
| top | average opponent: 1569record: 6-5 | new rating: 1527 | ||