Peng, William
Current rating: 1463
Record: 1-3
| Grand Prix Boston 2009 (M10 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 40 | McLaughlin, Charles (1416) | Lost 0-2 | -201480 |
| 2sealed | 255 | Hughes, Michael (1482) | Won 2-1 | +191499 |
| 3sealed | 217 | Gilbert, Nicholas (1500) | Lost 0-2 | -181481 |
| 4sealed | 246 | Kobayashi, Matthew H (1481) | Lost 1-2 | -181463 |
| average opponent: 1470record: 1-3 | new rating: 1463 | |||