Lach, Sigismond
Current rating: 1505
Record: 19-21-4
| Grand Prix Montreal 2019 (ELD limited) | starting rating: 1496 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 229 | Campagnie, Fanny (1500) | Won 2-1 | +181514 |
| 2sealed | 140 | Hooper, Andy (1517) | Draw 1-1 | 01514 |
| 3sealed | 173 | Berriel, Alejandro (1500) | Draw 1-1 | 01514 |
| 4sealed | 248 | Innes, Tanner (1508) | Won 2-1 | +181532 |
| 5sealed | 159 | Duke, Reid (2204) | Lost 0-2 | -81524 |
| 6sealed | 222 | Ordaz Juarez, Victor Ricardo (1449) | Lost 0-2 | -191505 |
| top | average opponent: 1613record: 2-2-2 | new rating: 1505 | ||
| Grand Prix Montreal 2018 (GRN limited) | starting rating: 1494 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 69 | Pepin, Mathieu (1429) | Won 2-1 | +161510 |
| 2sealed | 186 | Dussier, Alexys (1516) | Won 2-1 | +191529 |
| 3sealed | 198 | Sun, Allen (1670) | Lost 0-2 | -161513 |
| 4sealed | 229 | Bellefleur, Raphael (1525) | Draw 1-1 | 01513 |
| 5sealed | 236 | Genuario, Robert (1536) | Lost 0-2 | -171496 |
| top | average opponent: 1535record: 2-2-1 | new rating: 1496 | ||
| Grand Prix Montreal 2017 (AKH standard) | starting rating: 1453 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 2176 | Conrad, Cory (1514) | Lost 0-2 | -171436 |
| 2standard | 2250 | Lavoie, Philippe (1483) | Won 2-1 | +181454 |
| 3standard | 2324 | Benedict, Matthew (1679) | Won 2-0 | +231477 |
| 4standard | 2294 | Cooper, Travis (1637) | Won 2-0 | +201497 |
| 5standard | 2068 | Morun, Bogdan (1572) | Won 2-0 | +201517 |
| 6standard | 2077 | Bilodeau, Sebastian (1728) | Lost 1-2 | -141503 |
| 7standard | 2106 | Hill, Tyler (2047) | Lost 0-2 | -91494 |
| top | average opponent: 1666record: 4-3 | new rating: 1494 | ||
| Grand Prix Montreal 2016 (EMN limited) | starting rating: 1466 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 2293 | Bowker, Sam (1481) | Lost 1-2 | -171449 |
| 2sealed | 2356 | Lavoie Lauzon, Vincent (1483) | Won 2-0 | +181467 |
| 3sealed | 2453 | Vachon, Jonathan (1602) | Lost 0-0 | -151452 |
| 4sealed | 2548 | Tsontakis, Strato (1400) | Won 2-0 | +171469 |
| 5sealed | 2285 | Bourque, David (1508) | Won 2-0 | +181487 |
| 6sealed | 2216 | Huot, Jonathan (1526) | Lost 1-2 | -171470 |
| 7sealed | 2326 | Berk, Joshua (1488) | Lost 0-2 | -171453 |
| top | average opponent: 1498record: 3-4 | new rating: 1453 | ||
| Grand Prix Quebec City 2015 (BFZ standard) | starting rating: 1504 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 205 | Brzezinski, Pavel (1500) | Lost 0-2 | -181486 |
| 2standard | 211 | Lallier, Oscar (1409) | Draw 1-1 | -11485 |
| 3standard | 321 | Cherrier, Stephane (1465) | Lost 0-2 | -191466 |
| 4standard | 359 | McElrath, Matthew (1465) | Lost 0-1 | -181448 |
| 5standard | 334 | Roussel, Julien (1445) | Won 2-0 | +181466 |
| top | average opponent: 1457record: 1-3-1 | new rating: 1466 | ||
| Grand Prix Montreal 2015 (DTK limited) | starting rating: 1523 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 252 | Robert, Marie-Eve (1436) | Lost 0-2 | -201503 |
| 2sealed | 395 | Rioux, Martin (1481) | Lost 0-2 | -181485 |
| 3sealed | 530 | Fortier, Michael (1403) | Won 2-1 | +161501 |
| 4sealed | 395 | Evangelho, Ricardo (1599) | Lost 0-2 | -161485 |
| 5sealed | 448 | Bourgoin, Stephane (1481) | Won 2-0 | +181503 |
| 6sealed | 359 | Martineau, Robert (1586) | Won 2-1 | +191522 |
| 7sealed | 267 | Nolette, Michael (1520) | Lost 1-2 | -181504 |
| top | average opponent: 1501record: 3-4 | new rating: 1504 | ||
| Grand Prix Montreal 2014 (BNG limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 448 | Lessard, Etienne (1500) | Lost 1-2 | -181482 |
| 2sealed | 691 | Crowley, Kevin (1518) | Won 2-1 | +191501 |
| 3sealed | 597 | Fink, Erik (1501) | Lost 1-2 | -181483 |
| 4sealed | 504 | Simard, Raphael (1481) | Won 2-0 | +181501 |
| 5sealed | 432 | Buduroi, Nicolas (1486) | Won 2-1 | +171518 |
| 6sealed | 355 | Watters, Ryan (1521) | Won 2-0 | +181536 |
| 7sealed | 273 | Rowe, Jonathan (1770) | Lost 1-2 | -131523 |
| top | average opponent: 1540record: 4-3 | new rating: 1523 | ||