Atkinson, John
Current rating: 1604
Record: 22-17
| Grand Prix Detroit 2019 (M20 limited) | starting rating: 1567 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 66 | Nevling, Alex (1501) | Lost 1-2 | -191548 |
| 2sealed | 192 | Swisher, Nathan (1428) | Won 2-0 | +161564 |
| 3sealed | 211 | Burtka, Brian (1502) | Won 2-1 | +171581 |
| 4sealed | 98 | Kilmer, Micah (1509) | Won 2-0 | +171598 |
| 5sealed | 74 | Mitchell, Zane (1864) | Won 2-1 | +221620 |
| 6sealed | 76 | Perez Jr., Raymond (1748) | Lost 0-2 | -151605 |
| 7sealed | 90 | Westermann, W. Scott (1537) | Won 2-0 | +161621 |
| 8sealed | 41 | Doherty, Shawn (1649) | Lost 0-2 | -171604 |
| top | average opponent: 1592record: 5-3 | new rating: 1604 | ||
| Grand Prix Toronto 2018 (modern) | starting rating: 1529 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 444 | Spinelli, Franco (1500) | Won 2-1 | +171546 |
| 2modern | 325 | Joyall, Vincent (1432) | Won 2-0 | +161562 |
| 3modern | 154 | Brierley, Michael (1824) | Lost 0-2 | -131549 |
| 4modern | 448 | Lapalme, Michael (1483) | Won 2-0 | +171566 |
| 5modern | 232 | Li, Donald (1544) | Lost 0-2 | -191547 |
| 6modern | 452 | Neveu, Pierre Antoine (1655) | Lost 0-2 | -161531 |
| 7modern | 450 | McAlister, Nick (1502) | Won 2-0 | +181549 |
| 8modern | 254 | Wong-Tremblay, Charles (1582) | Won 2-0 | +181567 |
| top | average opponent: 1565record: 5-3 | new rating: 1567 | ||
| Grand Prix Montreal 2016 (EMN limited) | starting rating: 1504 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 2134 | Casselman, Christopher (1527) | Won 2-1 | +181522 |
| 2sealed | 2233 | Beauchemin, Samuel (1596) | Lost 1-2 | -161506 |
| 3sealed | 2392 | Petronzio, Nicolas (1534) | Won 0-0 | +181524 |
| 4sealed | 2249 | Beland, Nicolas (1599) | Lost 1-2 | -161508 |
| 5sealed | 2429 | Harkness, Dylan (1519) | Lost 1-2 | -181490 |
| 6sealed | 2455 | Pejic, Pavo (1366) | Won 2-0 | +161506 |
| 7sealed | 2811 | Wagenhoffer, Malcolm (1441) | Won 2-1 | +161522 |
| 8sealed | 2196 | Vachon, Jonathan (1614) | Won 0-0 | +201542 |
| 9sealed | 2138 | Thibeault, Vincent (1809) | Lost 0-2 | -131529 |
| top | average opponent: 1556record: 5-4 | new rating: 1529 | ||
| Grand Prix Toronto 2016 (SOI standard) | starting rating: 1505 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 438 | Linton, Owen (1500) | Lost 0-2 | -181487 |
| 2standard | 445 | Roberts, Elisha (1480) | Won 2-0 | +181505 |
| 3standard | 617 | Harrison, Nick (1471) | Lost 0-2 | -181487 |
| 4standard | 643 | Farrell, Brett (1482) | Won 2-0 | +181505 |
| 5standard | 429 | Bloomingdale, Andrew (1511) | Won 2-0 | +181523 |
| 6standard | 397 | Nolan, Sean (1534) | Won 2-0 | +181541 |
| 7standard | 301 | Chui, Kevin (1541) | Lost 1-2 | -181523 |
| 8standard | 318 | Mackey, Jay (1473) | Lost 0-2 | -191504 |
| top | average opponent: 1499record: 4-4 | new rating: 1504 | ||
| Grand Prix Indianapolis 2015 (BFZ standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 123 | MacKenzie, Charles (1482) | Lost 1-2 | -181482 |
| 2standard | 402 | Evanoff, Derek (1464) | Won 2-1 | +171499 |
| 3standard | 424 | Hicks, Ezra (1498) | Lost 1-2 | -181481 |
| 4standard | 430 | Gregory, Evan (1486) | Won 2-0 | +181499 |
| 5standard | 329 | Powers, Zachary (1375) | Won 2-0 | +161515 |
| 6standard | 221 | Majors, Michael (2010) | Lost 0-2 | -101505 |
| top | average opponent: 1552record: 3-3 | new rating: 1505 | ||