Duchene, Zachary
Current rating: 1565
| Grand Prix Toronto 2016 (SOI standard) | starting rating: 1613 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 180 | Cai, Eric (1598) | Won 2-1 | +181631 |
| 2standard | 104 | Robinson, Duncan (1482) | Lost 1-2 | -211610 |
| 3standard | 539 | Waterson, Aaron (1466) | Lost 0-2 | -211589 |
| 4standard | 626 | Redhead, Sean (1484) | Lost 0-2 | -191570 |
| 5standard | 643 | Hall, Alexander [CAN] (1462) | Won 2-0 | +161586 |
| 6standard | 483 | Tsiligiannis, Evangelos (1429) | Lost 0-2 | -211565 |
| top | average opponent: 1487record: 2-4 | new rating: 1565 | ||
| Grand Prix Toronto 2015 (DTK standard) | starting rating: 1518 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 356 | Lake, Christopher (1517) | Lost 0-2 | -181500 |
| 3standard | 576 | Wang, Kevin (1498) | Won 2-1 | +181518 |
| 4standard | 425 | Rapien, Taylor (1518) | Lost 1-2 | -181500 |
| 5standard | 582 | Fisher, Chris A (1576) | Won 2-1 | +191519 |
| 6standard | 253 | Jung, Steven (1487) | Won 2-0 | +171536 |
| 7standard | 254 | Ellsworth, Owen (1623) | Won 2-1 | +201556 |
| 8standard | 168 | Laskar, David (1557) | Won 2-1 | +181574 |
| 9standard | 132 | Ting-A-Kee, Andrew (1839) | Won 2-1 | +231597 |
| 10standard | 42 | Belanger, Maxim (1744) | Won 2-1 | +201617 |
| 11standard | 33 | Boswell, Andrew (1981) | Lost 1-2 | -111606 |
| 12standard | 56 | Hewitt, Chris (1610) | Won 2-1 | +181624 |
| 13standard | 38 | Bokser, Rory (1713) | Lost 0-2 | -171607 |
| 14standard | 62 | Manfield, Seth (2083) | Lost 0-2 | -101597 |
| 15standard | 69 | Hennick, Michael (1464) | Won 2-1 | +161613 |
| top | average opponent: 1658record: 9-5 | new rating: 1613 | ||
| Grand Prix Toronto 2013 (THS limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 171 | Dare, Ivan (1519) | Won 2-1 | +181518 |
| 3sealed | 6 | RONG, JAMES (1536) | Won 2-0 | +191537 |
| 4sealed | 1 | Sidhu, Jesse (1553) | Lost 1-2 | -181519 |
| 5sealed | 224 | Myatt, Jason (1477) | Won 2-1 | +171536 |
| 6sealed | 95 | Genna, Peter (1502) | Won 2-0 | +181554 |
| 7sealed | 33 | Xu, Gang (1556) | Lost 1-2 | -181536 |
| 8sealed | 194 | Mallette-Vanier, Guillaume (1530) | Lost 0-2 | -181518 |
| top | average opponent: 1525record: 4-3 | new rating: 1518 | ||