Cohn, Zachery
Current rating: 1530
Record: 15-13-2
| Grand Prix Quebec City 2015 (BFZ standard) | starting rating: 1534 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 163 | Lepine, Jeremie (1500) | Won 2-0 | +181552 |
| 2standard | 131 | Beaulieu, Marc (1483) | Lost 1-2 | -201532 |
| 3standard | 291 | Desroches, Jean-Raphael (1498) | Won 2-1 | +181550 |
| 4standard | 129 | Pineault, Mark (1492) | Lost 0-2 | -191531 |
| 5standard | 205 | Araujo, Ryan (1466) | Draw 0-0 | -11530 |
| top | average opponent: 1488record: 2-2-1 | new rating: 1530 | ||
| Grand Prix Toronto 2015 (DTK standard) | starting rating: 1534 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 373 | McIlveen, Johnny (1500) | Won 2-1 | +171551 |
| 2standard | 336 | Sommerville, Duncan (1518) | Won 2-1 | +171568 |
| 3standard | 174 | Walker, Joshua (1500) | Lost 1-2 | -191549 |
| 4standard | 444 | Demestrio, Joe (1801) | Won 2-0 | +231572 |
| 5standard | 322 | Valenzuela, Luis (1542) | Lost 0-2 | -191553 |
| 6standard | 350 | Millard, Quin (1507) | Lost 0-2 | -191534 |
| top | average opponent: 1561record: 3-3 | new rating: 1534 | ||
| Grand Prix Ottawa 2014 (KTK limited) | starting rating: 1558 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 266 | Bradbury, Wayne (1517) | Lost 0-2 | -181540 |
| 2sealed | 427 | Ogden, Cameron (1482) | Won 2-1 | +171557 |
| 3sealed | 475 | Hilson, Ian (1464) | Lost 1-2 | -201537 |
| 4sealed | 449 | Smith, Braedon (1480) | Won 2-0 | +171554 |
| 5sealed | 360 | Morozov, Kirill (1433) | Lost 0-2 | -201534 |
| top | average opponent: 1475record: 2-3 | new rating: 1534 | ||
| Grand Prix New Jersey 2014 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 1134 | Loke, Jun Yin (1419) | Won 2-1 | +161516 |
| 2legacy | 999 | Dobrzanski, Christopher (1535) | Won 2-0 | +191535 |
| 3legacy | 760 | Signorini, Daniel (1903) | Lost 1-2 | -121523 |
| 4legacy | 868 | Craven, Samuel (1451) | Lost 1-2 | -191504 |
| 5legacy | 871 | Decker, Mike (1581) | Won 2-0 | +191523 |
| 6legacy | 760 | Hall-Eastman, Jonathan (1472) | Lost 1-2 | -191504 |
| 7legacy | 897 | Justice, Matthew (1482) | Won 2-0 | +181522 |
| 8legacy | 761 | Ingram, Michael A (1416) | Won 2-0 | +161538 |
| 9legacy | 708 | Collins, Jason (1666) | Won 2-0 | +201558 |
| top | average opponent: 1547record: 6-3 | new rating: 1558 | ||
| Grand Prix Toronto 2013 (THS limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 135 | Bianchi, Josh (1500) | Won 2-0 | +181518 |
| 2sealed | 221 | Alvarez, Vincente (1500) | Lost 0-2 | -181500 |
| 3sealed | 363 | Weymouth, Mark (1478) | Won 2-0 | +171517 |
| 4sealed | 318 | Eady, Brent (1550) | Lost 0-2 | -171500 |
| 5sealed | 405 | Sharpe, Kenneth (1502) | Draw 1-1 | 01500 |
| top | average opponent: 1506record: 2-2-1 | new rating: 1500 | ||