Clark, Roger O
Current rating: 1503
Record: 3-3
| Grand Prix Washington DC 2010 (ROE standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 872 | Rawson, Ken (1572) | Won 2-0 | +191519 |
| 2standard | 679 | Bagenov, Andy (1518) | Lost 1-2 | -181501 |
| 3standard | 828 | Bennett, Doug (1502) | Lost 0-2 | -181483 |
| 4standard | 996 | Wolf, Steve (1481) | Won 2-1 | +181501 |
| 5standard | 915 | Lutz, Aaron (1499) | Won 2-1 | +181519 |
| 6standard | 818 | Qadir, Aadil (1599) | Lost 0-2 | -161503 |
| average opponent: 1528record: 3-3 | new rating: 1503 | |||