Petit, Derek
Current rating: 1526
Record: 9-8
| Grand Prix Madison 2015 (BFZ limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 1048 | Roltsch, Allan (1500) | Lost 0-2 | -181482 |
| 2sealed | 1046 | Grams, Marshall (1481) | Won 2-0 | +181500 |
| 3sealed | 1031 | Propson, Stephen (1588) | Won 2-0 | +191519 |
| 4sealed | 1039 | Mironovich, Andrew (1646) | Won 2-1 | +201539 |
| 5sealed | 1014 | Bellak, Justin (1547) | Lost 0-2 | -171522 |
| 6sealed | 1035 | So, Gary (1605) | Won 2-0 | +191541 |
| 7sealed | 1018 | Moore, CJ (1588) | Lost 0-2 | -171524 |
| 8sealed | 1023 | Schafer, Gregory (1638) | Lost 0-2 | -161508 |
| 9sealed | 1020 | Miedema, Mark (1504) | Won 2-0 | +181526 |
| average opponent: 1566record: 5-4 | new rating: 1526 | |||
| Grand Prix Chicago 2012 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 308 | Henrigillis, Nathan (1502) | Lost 1-2 | -181482 |
| 2modern | 341 | Schneider, Daniel (1546) | Won 2-0 | +191501 |
| 3modern | 375 | Patterson, Terry (1506) | Lost 0-2 | -181483 |
| 4modern | 462 | Huang, Kevin (1478) | Lost 0-2 | -181465 |
| 5modern | 466 | Yoblonski, David (1466) | Won 2-0 | +181483 |
| 6modern | 358 | Kelly, Frank (1420) | Lost 1-2 | -191464 |
| 7modern | 354 | Mann, Steve (1464) | Won 2-0 | +181482 |
| 8modern | 297 | Curran, Riley (1453) | Won 2-0 | +181500 |
| average opponent: 1479record: 4-4 | new rating: 1500 | |||