Butterfield, Peter
Current rating: 1520
Record: 6-5
| Grand Prix Charlotte 2016 (modern) | starting rating: 1521 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 141 | Williams, Randall (1519) | Won 2-0 | +181539 |
| 2modern | 166 | Barchus, Ian (1577) | Won 2-0 | +191558 |
| 3modern | 337 | Milanes, Eddie (1522) | Lost 0-2 | -191539 |
| 4modern | 180 | Brodie, Jeremy (1502) | Lost 1-2 | -191520 |
| average opponent: 1530record: 2-2 | new rating: 1520 | |||
| Grand Prix Charlotte 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 1143 | Smith, Joshua (1608) | Won 2-1 | +201520 |
| 2sealed | 959 | Barden, Chris (1518) | Lost 0-2 | -181502 |
| 3sealed | 1096 | Price, Pat (1696) | Won 2-1 | +211523 |
| 4sealed | 938 | Nestico, Adrian (1417) | Won 2-1 | +161539 |
| 5sealed | 810 | Misko, Sean (1540) | Won 2-0 | +191558 |
| 6sealed | 820 | Firebaugh, Jeremy (1556) | Lost 0-2 | -191539 |
| 7sealed | 876 | Harris, Edwin (1505) | Lost 0-2 | -181521 |
| average opponent: 1549record: 4-3 | new rating: 1521 | |||