Sorensen, Derek
Current rating: 1452
Record: 3-6
| Grand Prix Washington DC 2014 (JOU limited) | starting rating: 1467 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 44 | Gisch, Preston (1500) | Won 2-1 | +191486 |
| 2sealed | 198 | Elliott, Garth (1511) | Lost 0-2 | -181468 |
| 3sealed | 488 | Butzin, David (1479) | Lost 1-2 | -171451 |
| 4sealed | 521 | Thomas, Elijah (1488) | Won 2-0 | +181469 |
| 5sealed | 469 | Boccardo, John (1497) | Lost 0-2 | -171452 |
| average opponent: 1495record: 2-3 | new rating: 1452 | |||
| Grand Prix Oakland 2013 (M14 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 129 | du Mee, Ian (1500) | Lost 1-2 | -181482 |
| 2sealed | 536 | Howe, Joshua (1669) | Lost 0-2 | -151467 |
| 3sealed | 671 | Swanson, Matthew (1465) | Lost 0-2 | -181449 |
| 4sealed | 664 | Choy, Bryan (1446) | Won 2-0 | +181467 |
| average opponent: 1520record: 1-3 | new rating: 1467 | |||