Corbin, Joshua
Current rating: 1410
| Grand Prix Seattle-Tacoma 2015 (legacy) | starting rating: 1433 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 143 | Livengood, Shawn (1500) | Lost 1-2 | -171416 |
| 2legacy | 507 | Wiles, Taelor (1624) | Lost 1-2 | -141402 |
| 3legacy | 872 | Xiong, Xiaobo (1464) | Won 2-0 | +191421 |
| 4legacy | 643 | Lewis, Mike (1647) | Lost 1-2 | -141407 |
| 5legacy | 760 | Klemic, Michael (1507) | Won 2-0 | +201427 |
| 6legacy | 672 | Leon Jr, Luciano (1485) | Lost 0-2 | -171410 |
| top | average opponent: 1538record: 2-4 | new rating: 1410 | ||
| Grand Prix Las Vegas 2015 (1) (MM2 limited) | starting rating: 1447 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 32 | Thurber, Jessica (1522) | Won 2-0 | +191466 |
| 2sealed | 56 | Dillon, Jefferson (1465) | Lost 1-2 | -181448 |
| 3sealed | 201 | Buono, Robert (1398) | Won 2-1 | +171465 |
| 4sealed | 153 | Lopez Luna, Javier (1521) | Lost 1-2 | -171448 |
| 5sealed | 225 | Kossonogi, Ori (1584) | Lost 0-2 | -151433 |
| top | average opponent: 1498record: 2-3 | new rating: 1433 | ||
| Grand Prix Seattle 2000 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 39 | Nickell, Jesse (1500) | Lost 0-0 | -181482 |
| 2extended | 96 | Moody, Shawn (1482) | Won 0-0 | +181500 |
| 3extended | 96 | Blackwell, Trevor (1600) | Lost 0-0 | -161484 |
| 4extended | 125 | Best, Willie (1482) | Lost 0-0 | -181466 |
| 5extended | 114 | Hogfoss, Jayson (1482) | Won 0-0 | +181484 |
| 6extended | 110 | Houser, Michael (1447) | Lost 0-0 | -191465 |
| 7extended | 98 | Garfein, Geoffrey (1446) | Lost 0-0 | -181447 |
| top | average opponent: 1491record: 2-5 | new rating: 1447 | ||