Marshall, Samuel
Current rating: 1539
| Grand Prix Montreal 2018 (GRN limited) | starting rating: 1517 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 91 | Halsey, Stephen (1647) | Won 2-1 | +201537 |
| 2sealed | 32 | Grenier, Tommy (1467) | Won 2-0 | +171554 |
| 3sealed | 88 | Bernier, Francis (1563) | Won 2-0 | +181572 |
| 4sealed | 72 | DiMaio, JT (1488) | Lost 1-2 | -201552 |
| 5sealed | 155 | Fulger, Joshua (1653) | Won 2-1 | +201572 |
| 6sealed | 78 | Mazur, Spencer (1683) | Lost 1-2 | -161556 |
| 7sealed | 166 | Jurkovic, Stanley (1616) | Lost 0-2 | -171539 |
| top | average opponent: 1588record: 4-3 | new rating: 1539 | ||
| Grand Prix Montreal 2016 (EMN limited) | starting rating: 1507 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 2316 | Wheatley, Michael (1465) | Won 2-1 | +171524 |
| 2sealed | 2032 | Brierley, Michael (1748) | Lost 0-2 | -141510 |
| 3sealed | 2421 | Kiss, Roland (1514) | Won 0-0 | +191529 |
| 4sealed | 2224 | Langevin, Marjorie (1461) | Won 2-1 | +161545 |
| 5sealed | 2081 | Orts, Zachary (1653) | Lost 0-2 | -161529 |
| 6sealed | 2320 | Chen, Chao (1829) | Lost 0-2 | -121517 |
| top | average opponent: 1612record: 3-3 | new rating: 1517 | ||
| Grand Prix Montreal 2014 (BNG limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 606 | Shiels, Brian (1721) | Lost 1-2 | -141486 |
| 2sealed | 170 | Darlow, Ari (1481) | Lost 0-2 | -181468 |
| 3sealed | 652 | Meilleur, Jonathan (1464) | Won 2-1 | +181486 |
| 4sealed | 593 | Nevarko, Serguei (1473) | Won 2-1 | +181504 |
| 5sealed | 145 | Berube, Andre (1635) | Won 2-1 | +201524 |
| 6sealed | 278 | Garant-Rousseau, Guillaume (1593) | Lost 0-2 | -171507 |
| top | average opponent: 1561record: 3-3 | new rating: 1507 | ||