Williamson, Martin A
Current rating: 1464
Record: 0-2
| Grand Prix Pittsburgh 2011 (M12 standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 285 | Wilson, Mike W (1504) | Lost 0-2 | -181482 |
| 2standard | 478 | Rudd, Jon (1482) | Lost 0-2 | -181464 |
| average opponent: 1493record: 0-2 | new rating: 1464 | |||