Koerber, Kasey
Current rating: 1448
| Grand Prix Portland 2010 (M11 limited) | starting rating: 1420 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 496 | Kubin, Ryan (1502) | Won 2-0 | +191439 |
| 2sealed | 334 | Lochridge, Jeremey (1500) | Lost 0-2 | -171422 |
| 3sealed | 286 | Tapia, Steven (1486) | Won 2-0 | +201442 |
| 4sealed | 164 | Le, Anthony (1502) | Won 2-0 | +191461 |
| 5sealed | 109 | Hatch, Gregory (1754) | Lost 0-2 | -131448 |
| top | average opponent: 1549record: 3-2 | new rating: 1448 | ||
| Grand Prix Oakland 2010 (extended) | starting rating: 1465 | |||
| round | table | opponent (rating) | result | Δrating |
| 4extended | 1 | Gregson, Shaun (1536) | Lost 1-2 | -171448 |
| 5extended | 137 | Vidal, Aurelien (1537) | Lost 0-2 | -161432 |
| 6extended | 131 | Stark, Ben S (1780) | Lost 0-2 | -121420 |
| top | average opponent: 1618record: 0-3 | new rating: 1420 | ||
| Grand Prix Seattle 2009 (ARB standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 165 | Bingham, Tyrel (1522) | Lost 0-2 | -181482 |
| 2standard | 424 | Twitchell, Aaron C (1482) | Lost 0-2 | -181464 |
| 3standard | 452 | McGrath, Luke (1464) | Won 2-0 | +181482 |
| 4standard | 408 | Boren, Terry (1503) | Draw 1-1 | +11483 |
| 5standard | 429 | Walsh, Matthew H (1484) | Lost 1-2 | -181465 |
| top | average opponent: 1491record: 1-3-1 | new rating: 1465 | ||