Petersen, Sam
Current rating: 1390
Record: 2-8
| Grand Prix Phoenix 2018 (modern) | starting rating: 1462 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 220 | Inscho, Trevor (1500) | Lost 1-2 | -181444 |
| 2modern | 423 | Sperling, Chris (1353) | Won 2-0 | +171461 |
| 3modern | 508 | Vegso, Brian (1448) | Lost 0-2 | -181443 |
| 4modern | 506 | Cooper, Ryan (1470) | Lost 1-2 | -181425 |
| 5modern | 558 | Penrod, Jacob (1478) | Lost 0-2 | -171408 |
| 6modern | 491 | Harlan, Nicholas (1412) | Won 2-0 | +181426 |
| 7modern | 387 | Churchill, Michael (1450) | Lost 1-2 | -171409 |
| 8modern | 355 | Roberson, John (1383) | Lost 0-2 | -191390 |
| average opponent: 1437record: 2-6 | new rating: 1390 | |||
| Grand Prix Los Angeles 2016 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 716 | Ridlen, Christopher (1469) | Lost 0-2 | -191481 |
| 3modern | 985 | Davies, Michael (1390) | Lost 1-2 | -191462 |
| average opponent: 1429record: 0-2 | new rating: 1462 | |||