Peterson, Mark
Current rating: 1494
| Grand Prix Las Vegas 2018 (limited) (DOM limited) | starting rating: 1489 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 154 | Sohn, Michael (1496) | Won 2-1 | +181507 |
| 2sealed | 386 | Baick, Alex (1482) | Won 2-1 | +181525 |
| 3sealed | 161 | [anonymous] | Lost 1-2 | -121513 |
| 4sealed | 352 | La Rocco, Victor (1437) | Lost 1-2 | -191494 |
| 5sealed | 475 | Fenseca, Oscar (1496) | Won 2-1 | +181512 |
| 6sealed | 271 | Velez Jo, Gil (1497) | Lost 1-2 | -181494 |
| top | average opponent: 1552record: 3-3 | new rating: 1494 | ||
| Grand Prix Hartford 2018 (modern) | starting rating: 1446 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 14 | Ether, Nicholas (1500) | Lost 0-2 | -171429 |
| 2modern | 540 | Scaramuzzi, Joseph (1413) | Won 2-1 | +181447 |
| 3modern | 491 | Grahn, Matt (1500) | Lost 1-2 | -171430 |
| 4modern | 684 | Roper, Mark (1483) | Won 2-1 | +191449 |
| 5modern | 596 | Moore, William (1446) | Won 2-1 | +181467 |
| 6modern | 383 | Jones, Zachary (1526) | Won 2-0 | +191486 |
| 7modern | 365 | Nines, Lance (1517) | Won 2-0 | +181504 |
| 8modern | 168 | Zhang, Yue (1666) | Lost 0-2 | -151489 |
| top | average opponent: 1506record: 5-3 | new rating: 1489 | ||
| Grand Prix San Diego 1999 (MMQ limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 67 | Stenger, Christa (1500) | Lost 0-0 | -181482 |
| 2sealed | 92 | Moore, John (1482) | Lost 0-0 | -181464 |
| 3sealed | 133 | Potter, Jason (1467) | Lost 0-2 | -181446 |
| top | average opponent: 1483record: 0-3 | new rating: 1446 | ||