Watson, Derek R
Current rating: 1518
Record: 8-7
| Grand Prix Columbus 2010 (legacy) | starting rating: 1521 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 9 | Daily, Alex (1460) | Won 1-0 | +171538 |
| 2legacy | 136 | Johnson, Peter J (1578) | Lost 1-2 | -171521 |
| 3legacy | 114 | Potter, Daniel G (1483) | Lost 0-2 | -191502 |
| 4legacy | 266 | Kring, David (1481) | Won 2-1 | +181520 |
| 5legacy | 162 | Robbins, Randall (1465) | Won 2-0 | +171537 |
| 6legacy | 165 | Coleman, Allison (1518) | Won 2-1 | +171554 |
| 7legacy | 85 | Bledsoe, Doyle (1535) | Lost 1-2 | -181536 |
| 8legacy | 108 | Tanner, Joe (1520) | Lost 1-2 | -181518 |
| average opponent: 1505record: 4-4 | new rating: 1518 | |||
| Grand Prix Washington DC 2010 (ROE standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 644 | RUMBEL, CARL D (1500) | Won 2-1 | +181518 |
| 2standard | 704 | Kelahan, Ciaran (1518) | Lost 1-2 | -181500 |
| 3standard | 859 | Hayes, Isabel (1500) | Won 2-0 | +181518 |
| 4standard | 791 | Gieseler, Rob (1518) | Won 2-0 | +181536 |
| 5standard | 775 | Wetzel, Aaron (1593) | Won 2-1 | +191555 |
| 6standard | 666 | Dictus, Mark (1728) | Lost 1-2 | -151540 |
| 7standard | 697 | Gray, Jeremy (1490) | Lost 1-2 | -191521 |
| average opponent: 1549record: 4-3 | new rating: 1521 | |||