Sommer, Eugen
Current rating: 1446
Record: 13-17-2
| Grand Prix Prague 2018 (modern) | starting rating: 1455 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 520 | Krivanek, Jan (1500) | Lost 0-2 | -171438 |
| 2modern | 531 | Straub, Adrian (1483) | Lost 0-2 | -171421 |
| 3modern | 875 | Kolberg, Frank (1443) | Won 2-1 | +181439 |
| 4modern | 747 | Heider, Marc (1581) | Won 2-0 | +211460 |
| 5modern | 589 | Prosek, Daniel (1694) | Lost 0-2 | -141446 |
| top | average opponent: 1540record: 2-3 | new rating: 1446 | ||
| Grand Prix Prague 2016 (legacy) | starting rating: 1516 | |||
| round | table | opponent (rating) | result | Δrating |
| 3legacy | 37 | Pigott, Mark (1506) | Lost 1-2 | -181498 |
| 4legacy | 365 | Bezin, Jean-Baptiste (1435) | Won 2-0 | +171515 |
| 5legacy | 237 | Chandler, Vincent (1441) | Lost 1-2 | -201495 |
| 6legacy | 240 | Rutkowski, Tomasz (1517) | Lost 0-2 | -171478 |
| 7legacy | 373 | Fischer, Juliane (1242) | Lost 0-2 | -231455 |
| top | average opponent: 1428record: 1-4 | new rating: 1455 | ||
| Grand Prix Prague 2013 (M14 limited) | starting rating: 1514 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 193 | Eriksson, Andre (1508) | Lost 1-2 | -181496 |
| 2sealed | 391 | Fontaine, Marc (1658) | Lost 0-2 | -151481 |
| 3sealed | 698 | Shatalin, Anton (1429) | Won 2-1 | +171498 |
| 4sealed | 684 | Peterson, William (1418) | Won 2-0 | +171515 |
| 5sealed | 439 | Moravcsik, Zsolt (1455) | Won 2-1 | +171532 |
| 6sealed | 445 | Sevcik, Lukas (1486) | Won 2-0 | +171549 |
| 7sealed | 170 | Kawalec, Jiri (1538) | Lost 1-2 | -181531 |
| 8sealed | 261 | Wilbrand, Robert (1710) | Lost 0-2 | -151516 |
| top | average opponent: 1525record: 4-4 | new rating: 1516 | ||
| Grand Prix Bochum 2012 (RTR standard) | starting rating: 1494 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 547 | Aelbrecht, Jimmy (1516) | Draw 0-0 | 01494 |
| 2standard | 708 | Persaud, Arun (1394) | Won 2-1 | +161510 |
| 3standard | 639 | Bigorne, Aurelien (1424) | Draw 1-1 | -11509 |
| 4standard | 765 | Holzler, Franz (1537) | Lost 0-2 | -181491 |
| 5standard | 825 | Muller, Andre (1786) | Won 2-0 | +231514 |
| top | average opponent: 1531record: 2-1-2 | new rating: 1514 | ||
| Grand Prix Prague 2011 (NPH limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 25 | Illich, Tomas (1500) | Won 2-0 | +181518 |
| 2sealed | 12 | Jandrasits, Marco (1575) | Won 2-1 | +191537 |
| 3sealed | 37 | Ruess, Jan (1676) | Lost 0-2 | -151522 |
| 4sealed | 97 | Nosowicz, Karol (1808) | Lost 0-2 | -131509 |
| 5sealed | 158 | Tichy, Martin (1457) | Lost 1-2 | -191490 |
| 6sealed | 181 | Korinek, Petr (1482) | Lost 1-2 | -181472 |
| 7sealed | 167 | Smrcek, David (1464) | Won 2-0 | +171489 |
| 8sealed | 131 | Pechacek, Vladimir (1536) | Won 2-1 | +191508 |
| 9sealed | 102 | Ferretti, Elie (1697) | Lost 0-2 | -141494 |
| top | average opponent: 1577record: 4-5 | new rating: 1494 | ||