Birchall, John
Current rating: 1439
| Grand Prix Providence 2011 (legacy) | starting rating: 1450 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 406 | Joslin, Scott P (1500) | Draw 1-1 | +11451 |
| 2legacy | 543 | Nesrallah, Moses (1467) | Won 2-1 | +181469 |
| 3legacy | 492 | Verdoni, Ugo (1518) | Lost 0-2 | -171452 |
| 4legacy | 588 | Machado, Kyle (1556) | Won 2-0 | +201472 |
| 5legacy | 536 | Gareau, Philippe (1510) | Lost 0-2 | -171455 |
| 6legacy | 581 | Aleksandravicius, John (1590) | Lost 1-2 | -161439 |
| top | average opponent: 1523record: 2-3-1 | new rating: 1439 | ||
| Grand Prix Atlanta 2011 (extended) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 526 | Hill, Andrew (1503) | Won 2-1 | +181500 |
| 2extended | 418 | Graves, Robert (1679) | Lost 1-2 | -141486 |
| 3extended | 598 | Passaro, Johnathan E (1503) | Lost 0-2 | -181468 |
| 4extended | 624 | King, Jonathan (1466) | Lost 0-2 | -181450 |
| top | average opponent: 1538record: 1-3 | new rating: 1450 | ||
| Grand Prix Tampa 2009 (ZEN limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 97 | Martinez, Peter (1460) | Lost 1-2 | -191481 |
| 2sealed | 277 | Reschke, Justin D (1482) | Won 2-0 | +181499 |
| 3sealed | 269 | Trice, Obie (1500) | Won 2-1 | +181517 |
| 4sealed | 188 | Ley, Isaiah (1507) | Lost 0-2 | -181499 |
| 5sealed | 277 | Tremblay, Sebastien (1550) | Lost 0-2 | -171482 |
| top | average opponent: 1500record: 2-3 | new rating: 1482 | ||