Petrosillo, Alex A
Current rating: 1494
| Grand Prix Boston-Worcester 2012 (M13 limited) | starting rating: 1490 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 234 | Gaudette, Trey (1500) | Won 2-0 | +181508 |
| 2sealed | 433 | Heitker, Gabe M (1500) | Won 2-0 | +181526 |
| 3sealed | 85 | Santone, Gregory (1536) | Lost 1-2 | -181508 |
| 4sealed | 502 | Fisher, Droo (1516) | Won 2-0 | +181526 |
| 5sealed | 403 | Jackson, John (1504) | Lost 1-2 | -181508 |
| 6sealed | 313 | Kramer, Daniel (1719) | Lost 1-2 | -141494 |
| top | average opponent: 1546record: 3-3 | new rating: 1494 | ||
| Grand Prix Washington DC 2010 (ROE standard) | starting rating: 1481 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 620 | Gore, Emmett (1500) | Won 2-0 | +181499 |
| 2standard | 678 | Wilson, Wayne G (1518) | Won 2-1 | +191518 |
| 3standard | 646 | Himes, Chad (1504) | Won 2-0 | +181536 |
| 4standard | 705 | Damo da Rosa, Paulo Vitor (2020) | Lost 0-2 | -101526 |
| 5standard | 758 | Michael, Kevin (1524) | Lost 0-2 | -181508 |
| 6standard | 805 | Hutchens, Kyle (1514) | Lost 1-2 | -181490 |
| top | average opponent: 1597record: 3-3 | new rating: 1490 | ||
| Grand Prix Boston 2009 (M10 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 42 | Post, Steven (1500) | Lost 1-2 | -181482 |
| 2sealed | 268 | Shea, Don (1482) | Won 2-1 | +181500 |
| 3sealed | 280 | Griffin, Blair (1479) | Lost 1-2 | -181482 |
| 4sealed | 288 | Scheier, Garrett C (1450) | Won 2-0 | +171499 |
| 5sealed | 238 | Chin, Richard (1501) | Lost 0-2 | -181481 |
| top | average opponent: 1482record: 2-3 | new rating: 1481 | ||