Petersen, Sean
Current rating: 1526
| Grand Prix Milwaukee 2018 (GRN standard) | starting rating: 1470 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 379 | Krusemark, Cole (1500) | Won 2-1 | +181488 |
| 2standard | 13 | Schang, Owen (1536) | Won 2-1 | +191507 |
| 3standard | 65 | Kizuka, Jeremy (1582) | Won 2-0 | +201527 |
| 4standard | 21 | Orange, Gregory (2007) | Lost 1-2 | -101517 |
| 5standard | 193 | Neumann, Thayne (1539) | Won 2-0 | +181535 |
| 6standard | 149 | Johnson, Alex (1846) | Lost 0-2 | -121523 |
| 7standard | 250 | Moreno, Matthew (1506) | Won 2-0 | +171540 |
| 8standard | 181 | Watts, Matthew (1742) | Lost 0-2 | -141526 |
| top | average opponent: 1657record: 5-3 | new rating: 1526 | ||
| Grand Prix Milwaukee 2016 (KLD limited) | starting rating: 1486 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 185 | Parchem, Casey (1500) | Lost 1-2 | -171469 |
| 2sealed | 352 | Sams, Walter (1481) | Won 2-1 | +181487 |
| 3sealed | 437 | Freeman, Steven (1500) | Won 2-1 | +181505 |
| 4sealed | 302 | Rockweit, Anthony (1525) | Won 2-1 | +191524 |
| 5sealed | 129 | Gutierrez, Rob (1467) | Lost 0-2 | -191505 |
| 6sealed | 278 | Wynn, Eric (1492) | Lost 1-2 | -191486 |
| 7sealed | 303 | Johnson, Devin (1505) | Won 2-0 | +191505 |
| 8sealed | 301 | Schirling, Alex (1547) | Lost 0-2 | -181487 |
| 9sealed | 284 | James, Colin (1505) | Lost 0-2 | -171470 |
| top | average opponent: 1502record: 4-5 | new rating: 1470 | ||
| Grand Prix Chicago 2014 (JOU standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 638 | Muys, Michael (1500) | Won 2-1 | +181518 |
| 2standard | 597 | Medanic, Steve (1485) | Lost 0-2 | -191499 |
| 3standard | 764 | Padgett, Megan (1502) | Won 2-0 | +181517 |
| 4standard | 660 | Schafer, Gregory (1665) | Lost 1-2 | -151502 |
| 5standard | 801 | Smith, Joseph (1539) | Won 2-0 | +191521 |
| 6standard | 589 | Joseph, Adam (1618) | Lost 0-2 | -161505 |
| 7standard | 707 | Muffitt, Michael (1500) | Lost 0-2 | -191486 |
| top | average opponent: 1544record: 3-4 | new rating: 1486 | ||