Cummings, Sam
Current rating: 1537
| Grand Prix Portland 2018 (modern) | starting rating: 1511 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 325 | Hagen, Jack (1481) | Won 2-1 | +171528 |
| 2modern | 356 | Gomez, Douglas (1643) | Won 2-1 | +211549 |
| 3modern | 207 | Taylor, Chad (1603) | Lost 1-2 | -171532 |
| 4modern | 522 | Borthwick, Noah (1620) | Won 2-1 | +191551 |
| 5modern | 277 | Barlog, David (1610) | Won 2-1 | +191570 |
| 6modern | 112 | Nguyen, Daniel (1735) | Lost 1-2 | -151555 |
| 7modern | 181 | Hewitt, Thomas (1544) | Lost 0-2 | -181537 |
| top | average opponent: 1605record: 4-3 | new rating: 1537 | ||
| Grand Prix Portland 2017 (XLN standard) | starting rating: 1483 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 58 | Onagan, Chris (1446) | Won 2-1 | +171500 |
| 2standard | 85 | Emery, Joshua (1437) | Lost 1-2 | -191481 |
| 3standard | 613 | Cayan, Grant (1501) | Won 2-0 | +191500 |
| 4standard | 449 | Belmontez, Luis (1521) | Won 2-1 | +181518 |
| 5standard | 245 | Sato, Rei (1950) | Lost 1-2 | -111507 |
| 6standard | 427 | Senger, Dustin (1520) | Lost 0-2 | -171490 |
| 7standard | 454 | Weert, Levi (1498) | Won 2-0 | +181508 |
| 8standard | 301 | Smith, Ian (1531) | Won 2-0 | +181526 |
| 9standard | 211 | Francis, Mitchell (1577) | Won 2-1 | +191545 |
| 10standard | 154 | Leach, William (1584) | Won 2-0 | +191564 |
| 11standard | 139 | Fleenor, Gordon (1591) | Lost 1-2 | -181546 |
| 12standard | 124 | Barbee, Derek (1582) | Lost 1-2 | -171529 |
| 13standard | 141 | Randall, Raymond (1548) | Won 2-1 | +181547 |
| 14standard | 118 | Odom, Dylan (1561) | Lost 1-2 | -171530 |
| 15standard | 131 | Blasy, Craig (1498) | Lost 0-2 | -191511 |
| top | average opponent: 1556record: 8-7 | new rating: 1511 | ||
| Grand Prix Portland 2016 (EMN standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 437 | Blank, Gabriel (1500) | Lost 1-2 | -181482 |
| 2standard | 635 | Abner, Gabriel (1486) | Lost 0-2 | -181464 |
| 3standard | 749 | Bishop, Lucas (1464) | Won 2-1 | +181482 |
| 4standard | 653 | Gurisko, Kyle (1480) | Won 2-0 | +181500 |
| 5standard | 389 | Gipson, Jordan (1554) | Lost 0-2 | -171483 |
| top | average opponent: 1497record: 2-3 | new rating: 1483 | ||