Lachance, Jonathan
Current rating: 1427
| Grand Prix Montreal 2015 (DTK limited) | starting rating: 1412 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 110 | Yoo, Edmond (1500) | Draw 1-1 | +21414 |
| 2sealed | 284 | Johnston, Chad (1526) | Won 2-0 | +201434 |
| 3sealed | 251 | Thibeau, Jeremy (1555) | Lost 1-2 | -161418 |
| 4sealed | 372 | Ip, Jonathan (1537) | Won 2-0 | +201438 |
| 5sealed | 252 | Fequet, Louis (1519) | Lost 1-2 | -161422 |
| 6sealed | 331 | Dufour, Jimmy (1646) | Won 2-1 | +221444 |
| 7sealed | 244 | Taggett, Jacob (1516) | Lost 0-2 | -171427 |
| top | average opponent: 1543record: 3-3-1 | new rating: 1427 | ||
| Grand Prix Montreal 2014 (BNG limited) | starting rating: 1446 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 203 | Monette, Hugo-Olivier (1500) | Lost 1-2 | -171429 |
| 2sealed | 203 | Manios, Timothy (1480) | Lost 1-2 | -171412 |
| top | average opponent: 1490record: 0-2 | new rating: 1412 | ||
| Grand Prix Montreal 2011 (M12 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 56 | Pileggi, Riccardo (1574) | Lost 0-2 | -171483 |
| 2sealed | 157 | Hayward, Michael (1483) | Lost 1-2 | -181465 |
| 3sealed | 228 | Tessier, Adam (1412) | Lost 0-2 | -191446 |
| top | average opponent: 1490record: 0-3 | new rating: 1446 | ||