Marshall, William
Current rating: 1539
Record: 5-3
| Grand Prix Manchester 2012 (DKA limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 137 | Engiert, Grzegorz (1548) | Won 2-0 | +191519 |
| 2sealed | 107 | Carvajal, Jorge [PRT] (1571) | Lost 1-2 | -171502 |
| 3sealed | 125 | Murray, Ed (1498) | Won 2-1 | +181520 |
| 4sealed | 105 | Barbari, Andrea (1502) | Won 2-0 | +171537 |
| 5sealed | 124 | Van Der Sman, Caspar (1540) | Won 2-0 | +181555 |
| 6sealed | 75 | Pichon, Elie (1843) | Won 2-1 | +241579 |
| 7sealed | 14 | Noormagi, Ants-Erik (1549) | Lost 1-2 | -191560 |
| 8sealed | 50 | Hoydonckx, Yves (1363) | Lost 1-2 | -211539 |
| average opponent: 1552record: 5-3 | new rating: 1539 | |||