Yowell, William B
Current rating: 1519
Record: 6-5
| Grand Prix Houston 2010 (extended) | starting rating: 1555 | |||
| round | table | opponent (rating) | result | Δrating |
| 3extended | 48 | Keith, Jody (1571) | Lost 0-2 | -171538 |
| 4extended | 127 | Smith, Mark S (1518) | Lost 1-2 | -191519 |
| average opponent: 1545record: 0-2 | new rating: 1519 | |||
| Grand Prix Dallas 2007 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 78 | Dio, Michael V (1500) | Lost 1-2 | -181482 |
| 2extended | 253 | Nguyen, Tin (1448) | Won 2-0 | +171499 |
| 3extended | 190 | Kincaid, Tim (1502) | Lost 0-0 | -181481 |
| 4extended | 277 | Taulbee, Aj (1464) | Won 2-1 | +181499 |
| 5extended | 251 | Napoli, Phillip (1638) | Lost 1-2 | -151484 |
| 6extended | 229 | Guy, Damion (1482) | Won 2-0 | +181502 |
| 7extended | 156 | Winger, Michael (1514) | Won 2-0 | +181520 |
| 8extended | 101 | hastain, greg (1549) | Won 2-0 | +181538 |
| 9extended | 71 | Martinez, Peter (1477) | Won 2-0 | +171555 |
| average opponent: 1508record: 6-3 | new rating: 1555 | |||