McDuff, Michael
Current rating: 1574
Record: 10-7
| Grand Prix Toronto 2018 (modern) | starting rating: 1553 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 254 | Lorrey, Mike (1482) | Won 2-1 | +171570 |
| 3modern | 310 | Fung, Kenny KB (1533) | Lost 1-2 | -191551 |
| 4modern | 290 | Noworaj, Andrew (1668) | Won 2-0 | +211572 |
| 5modern | 194 | Xing, Jiahang (1545) | Won 2-1 | +171589 |
| 6modern | 206 | Nickolai, Matthew (1837) | Lost 0-2 | -141575 |
| 7modern | 213 | Coats, Michael (1467) | Lost 1-2 | -201555 |
| 8modern | 306 | Chatel, Cedric (1578) | Won 2-1 | +191574 |
| average opponent: 1587record: 4-3 | new rating: 1574 | |||
| Grand Prix Montreal 2017 (AKH standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 2173 | Ioannou, Peter (1471) | Won 2-0 | +171517 |
| 2standard | 2017 | Cusson, Marc-Olivier (1547) | Won 2-0 | +191536 |
| 3standard | 2036 | Labelle, Alexandre (1554) | Won 2-0 | +181554 |
| 4standard | 2097 | Wasson, John (1913) | Won 2-0 | +251579 |
| 5standard | 2054 | Cheng, Ian (1578) | Won 2-0 | +181597 |
| 6standard | 2013 | Reynolds, Patrick (1832) | Won 2-1 | +221619 |
| 7standard | 2012 | Echevarria, Tyler (1519) | Lost 0-2 | -201599 |
| 8standard | 2011 | Hayne, Alexander (2124) | Lost 0-2 | -91590 |
| 9standard | 2086 | Axtell, Matthew (1486) | Lost 0-2 | -201570 |
| 10standard | 2080 | LaPlante, Ryan (1651) | Lost 0-2 | -171553 |
| average opponent: 1668record: 6-4 | new rating: 1553 | |||