Perry, Karston
Current rating: 1429
Record: 2-6-1
| Grand Prix Dallas-Fort Worth 2011 (MBS standard) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 70 | Black, Adam (1500) | Won 2-0 | +191483 |
| 2standard | 122 | Partlow, Drew (1518) | Lost 0-2 | -181465 |
| 3standard | 326 | Arrowsmith, Michael (1429) | Lost 1-2 | -181447 |
| 4standard | 467 | Stoute, Terry (1480) | Lost 1-2 | -181429 |
| average opponent: 1482record: 1-3 | new rating: 1429 | |||
| Grand Prix Houston 2010 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 51 | Espinoza, Khristian (1500) | Draw 1-1 | 01500 |
| 2extended | 153 | Harris, Alden (1522) | Lost 0-2 | -181482 |
| 3extended | 225 | Kerr, Robert C (1448) | Lost 1-2 | -181464 |
| 4extended | 283 | Dhanens, Joshua M (1464) | Lost 1-2 | -181446 |
| 5extended | 268 | Flores, Rita (1464) | Won 2-0 | +181464 |
| average opponent: 1480record: 1-3-1 | new rating: 1464 | |||