Marranzini, Joseph
Current rating: 1503
Record: 3-3
| Grand Prix Boston-Worcester 2012 (M13 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 454 | Clark, Scott (1418) | Won 2-1 | +171517 |
| 2sealed | 250 | Brown, Alex (1574) | Won 2-1 | +191536 |
| 3sealed | 179 | Nguyen, Richard (1736) | Lost 0-2 | -151521 |
| 4sealed | 477 | Tepper, James (1525) | Won 2-0 | +181539 |
| 5sealed | 203 | Raz, Lemuel (1533) | Lost 1-2 | -181521 |
| 6sealed | 334 | Anderson, William (1488) | Lost 0-2 | -181503 |
| average opponent: 1546record: 3-3 | new rating: 1503 | |||