Winfree, Charles P
Current rating: 1464
Record: 2-4
| Grand Prix Portland 2010 (M11 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 473 | wiesenfeld, jesse (1458) | Lost 1-2 | -191481 |
| 2sealed | 419 | Phillips, Chris (1482) | Won 2-0 | +181499 |
| 3sealed | 477 | Ostash, Keith (1518) | Lost 1-2 | -171482 |
| 4sealed | 419 | Vinson, David (1482) | Lost 1-2 | -181464 |
| 5sealed | 478 | Cook, Casey (1464) | Won 2-1 | +181482 |
| 6sealed | 362 | Thompson, David (1484) | Lost 1-2 | -181464 |
| average opponent: 1481record: 2-4 | new rating: 1464 | |||