Jahn, Stephan
Current rating: 1371
| Grand Prix Prague 2019 (UMA limited) | starting rating: 1438 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 497 | Utermark, Janno (1486) | Lost 0-2 | -181420 |
| 2sealed | 1114 | Welehorski, Dominik (1429) | Lost 0-2 | -171403 |
| 3sealed | 1110 | Casanova, Carlos (1699) | Lost 0-2 | -131390 |
| 4sealed | 1115 | Desmet, Thomas (1339) | Lost 1-2 | -191371 |
| top | average opponent: 1488record: 0-4 | new rating: 1371 | ||
| Grand Prix Prague 2018 (modern) | starting rating: 1473 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 198 | Anzile, Andrea (1409) | Lost 0-2 | -191454 |
| 2modern | 683 | Stuhler, Johannes (1484) | Lost 0-2 | -171437 |
| 3modern | 882 | Roiss, Stefan (1464) | Won 2-1 | +181455 |
| 4modern | 862 | Fujs, Aleksander (1482) | Lost 0-2 | -171438 |
| top | average opponent: 1460record: 1-3 | new rating: 1438 | ||
| Grand Prix Prague 2016 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 107 | Bocak, Petr (1418) | Won 2-1 | +171517 |
| 2legacy | 121 | Anttila, Markku (1581) | Lost 0-2 | -171500 |
| 3legacy | 393 | Kure, Mathias (1502) | Lost 0-2 | -181482 |
| 4legacy | 554 | Schultze, Max (1701) | Won 2-0 | +221504 |
| 5legacy | 385 | Kuchta, Tomas (1834) | Lost 0-2 | -131491 |
| 6legacy | 577 | Hugon, Lionel (1475) | Lost 0-2 | -181473 |
| top | average opponent: 1585record: 2-4 | new rating: 1473 | ||