De Sousa, Mathew
Current rating: 1481
Record: 11-13
| Grand Prix Niagara Falls 2019 (legacy) | starting rating: 1437 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 261 | Restemyer, Samuel (1500) | Lost 0-2 | -161421 |
| 2legacy | 338 | Harlan, Peter (1499) | Won 2-0 | +191440 |
| 3legacy | 377 | Newyear, Keith (1550) | Won 2-0 | +201460 |
| 4legacy | 142 | Ciarkowski, Andrew (1416) | Lost 1-2 | -191441 |
| 5legacy | 323 | Lentz, Connor (1570) | Won 2-0 | +201461 |
| 6legacy | 167 | Zdrojewski, Ian (1596) | Lost 1-2 | -151446 |
| 7legacy | 256 | Hennig, Eric (1423) | Won 2-1 | +171463 |
| 8legacy | 153 | Kikta, Mark (1425) | Won 2-0 | +181481 |
| top | average opponent: 1497record: 5-3 | new rating: 1481 | ||
| Grand Prix Toronto 2019 (modern) | starting rating: 1429 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 417 | Cook, Kyle (1424) | Won 2-0 | +181447 |
| 2modern | 199 | Thwaites, Mark (1484) | Won 2-1 | +191466 |
| 3modern | 250 | Dube, Jean-Francois (1539) | Won 2-0 | +191485 |
| 4modern | 14 | Arquette, James (1535) | Won 2-1 | +191504 |
| 5modern | 19 | Yam, Richard (1561) | Lost 0-2 | -171487 |
| 6modern | 145 | Maguire, Doug (1599) | Lost 1-2 | -161471 |
| 7modern | 251 | Li, Jonathan [CAN] (1617) | Lost 1-2 | -151456 |
| 8modern | 235 | Cordingley, Trevor (1431) | Lost 0-2 | -191437 |
| top | average opponent: 1524record: 4-4 | new rating: 1437 | ||
| Grand Prix Toronto 2018 (modern) | starting rating: 1502 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 540 | Vandermuren, Adam (1471) | Lost 1-2 | -191483 |
| 2modern | 417 | Joligon, Mark (1524) | Lost 0-2 | -171466 |
| 3modern | 791 | Carter, Dakota (1416) | Lost 1-2 | -191447 |
| 5modern | 694 | Viersen, Xavier (1466) | Lost 0-2 | -181429 |
| top | average opponent: 1469record: 0-4 | new rating: 1429 | ||
| Grand Prix Toronto 2017 (HOU limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 172 | Bulnes, Armando (1601) | Lost 0-2 | -161484 |
| 2sealed | 486 | Ward, Tamara (1482) | Won 2-0 | +181502 |
| 3sealed | 466 | Hanenberg, Scott (1498) | Won 2-1 | +181520 |
| 4sealed | 187 | Scribi, Scott (1514) | Lost 0-2 | -181502 |
| top | average opponent: 1524record: 2-2 | new rating: 1502 | ||