Madonia, John
Current rating: 1531
Record: 5-4
| Grand Prix Toronto 2012 (modern) | starting rating: 1467 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 8 | DiCocco, Anthony (1500) | Won 2-1 | +191486 |
| 2modern | 8 | Berry, Craig (1629) | Lost 0-2 | -161470 |
| 3modern | 242 | Boswell, Andrew (1625) | Won 2-1 | +211491 |
| 4modern | 213 | Lansche, Derek (1530) | Won 2-1 | +191510 |
| 5modern | 112 | Wand, Ian (1535) | Won 2-1 | +181528 |
| 6modern | 81 | Deir, Shane (1552) | Won 2-0 | +191547 |
| 7modern | 82 | Leon Valencia, Francisco (1689) | Lost 1-2 | -161531 |
| average opponent: 1580record: 5-2 | new rating: 1531 | |||
| Grand Prix Boston 2009 (M10 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 125 | Lewis, Jonathan D (1467) | Lost 0-2 | -191481 |
| 3sealed | 201 | Berrios, Stephen (1681) | Lost 0-2 | -141467 |
| average opponent: 1574record: 0-2 | new rating: 1467 | |||