Lachance-Poitras, David
Current rating: 1441
Record: 7-11
| Grand Prix Montreal 2019 (ELD limited) | starting rating: 1428 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 261 | Burrows-Johnson, Andrew (1645) | Won 2-1 | +221450 |
| 2sealed | 294 | Desbiens, Philippe (1709) | Lost 0-2 | -131437 |
| 3sealed | 305 | Griffioen, Derrek (1302) | Won 2-1 | +151452 |
| 4sealed | 172 | Marmorato, Matthew (1550) | Lost 0-2 | -161436 |
| 5sealed | 187 | Pageau, Eric (1465) | Won 2-1 | +191455 |
| 6sealed | 136 | Bekmesian, Chris (1707) | Lost 1-2 | -141441 |
| top | average opponent: 1563record: 3-3 | new rating: 1441 | ||
| Grand Prix Montreal 2014 (BNG limited) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 250 | Stewart, Kevin (1455) | Lost 1-2 | -181446 |
| 2sealed | 496 | Lefrancois-Jutras, Fred (1483) | Lost 0-2 | -181428 |
| top | average opponent: 1469record: 0-2 | new rating: 1428 | ||
| Grand Prix Montreal 2011 (M12 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 364 | Tyson, Bryant (1501) | Lost 0-2 | -181482 |
| 2sealed | 533 | Berube, Julien (1463) | Won 2-1 | +181500 |
| 3sealed | 505 | Villeneuve, Sebastien (1500) | Lost 0-2 | -181482 |
| 4sealed | 559 | Tay, Bruce (1484) | Lost 1-2 | -181464 |
| top | average opponent: 1487record: 1-3 | new rating: 1464 | ||
| Grand Prix Montreal 2007 (Time Spiral block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 33 | Hamelin, Patrick (1500) | Won 2-1 | +181518 |
| 2block | 130 | Miller, Brent (1517) | Won 2-1 | +181536 |
| 3block | 51 | Estell, Brock (1534) | Lost 0-2 | -181518 |
| 4block | 139 | Muir, Jeremy (1486) | Lost 1-2 | -191499 |
| 5block | 252 | De Villa, Sebastian (1499) | Won 2-0 | +181517 |
| 6block | 154 | Dunning, Edward (1551) | Lost 1-2 | -171500 |
| top | average opponent: 1515record: 3-3 | new rating: 1500 | ||