Sommer, Jan
Current rating: 1546
Record: 8-5-3
| Grand Prix Birmingham 2019 (modern) | starting rating: 1511 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 80 | White, Dave (1500) | Won 2-0 | +181529 |
| 2modern | 152 | Davis, Lewis (1517) | Won 2-0 | +181547 |
| 3modern | 141 | Fishwick, Shaun (1511) | Won 2-0 | +171564 |
| 4modern | 30 | Walsh, Steven (1526) | Lost 1-2 | -191545 |
| 5modern | 90 | Hyttel, Lucas (1763) | Lost 0-2 | -141531 |
| 6modern | 258 | Berseth, Quentin (1518) | Lost 0-2 | -181513 |
| 7modern | 221 | Nicholl, Finbar (1434) | Won 2-0 | +171530 |
| 8modern | 179 | Smy, Reuben (1435) | Won 2-0 | +161546 |
| average opponent: 1526record: 5-3 | new rating: 1546 | |||
| Grand Prix Prague 2018 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 19 | Cofek, Vito (1500) | Lost 0-2 | -181482 |
| 2modern | 612 | Kumstyr, Josef (1482) | Won 2-1 | +181500 |
| 3modern | 603 | Nowak, Michael (1503) | Won 2-1 | +181518 |
| 4modern | 476 | Toufar, Dalibor (1503) | Draw 1-1 | 01518 |
| 5modern | 426 | Kubicek, Jan-Michael (1516) | Won 2-0 | +181536 |
| 6modern | 287 | Demelmayr, Michael (1378) | Draw 1-1 | -31533 |
| 7modern | 422 | Mederly, Martin (1431) | Draw 1-1 | -21531 |
| 8modern | 459 | Baldinelli, Simone (1431) | Lost 0-2 | -201511 |
| average opponent: 1468record: 3-2-3 | new rating: 1511 | |||