Irby, John
Current rating: 1618
Record: 11-5
| Grand Prix Philadelphia 2012 (RTR limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 817 | Davis, Thomas (1467) | Won 0-0 | +171517 |
| 2sealed | 723 | Hatch, Bryan (1518) | Won 2-1 | +181535 |
| 3sealed | 560 | Lundblad, Erik (1525) | Won 2-0 | +181553 |
| 4sealed | 570 | McDougal, Shaun (1500) | Won 2-0 | +171570 |
| 5sealed | 510 | Guild, Jacob (1612) | Lost 1-2 | -171553 |
| 6sealed | 624 | Tessitore, Jimmy (1493) | Won 2-1 | +171570 |
| 7sealed | 558 | Corrigan, Griffin (1643) | Won 2-0 | +191589 |
| 8sealed | 512 | Finefield, Mark (1536) | Won 2-1 | +171606 |
| 9sealed | 526 | Martell, Tom (2037) | Won 2-0 | +261632 |
| 10sealed | 19 | Mullin, Zack (1547) | Won 2-0 | +161648 |
| 11draft | 91 | Tse, Jay (1719) | Lost 0-2 | -171631 |
| 12draft | 45 | Becker, Jonathan (1759) | Won 2-1 | +211652 |
| 13draft | 23 | Wdowiasz, Jonathan (1593) | Lost 0-2 | -191633 |
| 14draft | 57 | Spencer, James (1624) | Lost 1-2 | -181615 |
| 15draft | 29 | Adams, Lucas (1621) | Won 2-1 | +181633 |
| 16draft | 34 | Rowe, Jonathan (1838) | Lost 0-2 | -151618 |
| average opponent: 1627record: 11-5 | new rating: 1618 | |||