Sommerfeld, Randolph
Current rating: 1483
Record: 8-9
| Grand Prix Seattle 2018 (legacy) (legacy) | starting rating: 1521 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 371 | Marucci, Joe (1545) | Lost 0-2 | -181503 |
| 2legacy | 633 | Parker, Travis (1507) | Won 2-1 | +181521 |
| 3legacy | 560 | Dreyer, Patrick (1659) | Lost 0-2 | -151506 |
| 4legacy | 581 | Black, Seth (1378) | Lost 0-2 | -201486 |
| 5legacy | 661 | Brunswick, Phillip (1463) | Won 2-0 | +171503 |
| 6legacy | 489 | Porchas, Justin (1407) | Lost 0-2 | -201483 |
| average opponent: 1493record: 2-4 | new rating: 1483 | |||
| Grand Prix Vancouver 2017 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 2257 | Riendeau, Brian (1490) | Won 2-1 | +181518 |
| 2modern | 2057 | Mense, Dylan (1559) | Won 2-0 | +191537 |
| 3modern | 2271 | Henderson, Steven (1430) | Lost 0-2 | -201517 |
| 4modern | 2463 | Wood, Michael (1472) | Lost 0-2 | -191498 |
| 5modern | 2447 | Marshall, Liam (1550) | Won 2-1 | +191517 |
| 6modern | 2388 | Fontaine, Yannick (1454) | Won 2-0 | +171534 |
| 7modern | 2188 | W, Addi (1519) | Won 2-0 | +171551 |
| 8modern | 2196 | Tsang, Garrett (1565) | Won 2-1 | +191570 |
| 9modern | 2132 | Simard, Jason (1661) | Lost 1-2 | -171553 |
| 10modern | 2129 | McClenaghan, David (1643) | Lost 0-2 | -161537 |
| 11modern | 2195 | Turchansky, Zak (1643) | Lost 1-2 | -161521 |
| average opponent: 1544record: 6-5 | new rating: 1521 | |||