Duncan, Luke
Current rating: 1556
Record: 9-6
| Grand Prix Strasbourg 2019 (RNA limited) | starting rating: 1522 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 469 | Wong, Tony (1450) | Won 2-1 | +171539 |
| 2sealed | 177 | Pedone, Sebastien (1376) | Won 2-0 | +151554 |
| 3sealed | 249 | Schatz, Markus (1588) | Won 2-0 | +181572 |
| 4sealed | 101 | Adams, Olaf (1503) | Lost 0-2 | -191553 |
| 5sealed | 261 | Barth, Konstantin (1485) | Lost 0-2 | -191534 |
| 6sealed | 260 | Chababi, Selim (1586) | Won 2-0 | +191553 |
| 7sealed | 310 | Eggenschwiler, Etienne (1755) | Lost 1-2 | -151538 |
| 8sealed | 255 | Olpp, Daniel (1528) | Won 2-1 | +181556 |
| average opponent: 1534record: 5-3 | new rating: 1556 | |||
| Grand Prix Sacramento 2018 (M19 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 129 | Kelly, Sean 695 (1464) | Won 2-1 | +171517 |
| 2sealed | 160 | Cuevas, Alex 974 (1497) | Won 2-1 | +181535 |
| 3sealed | 79 | Cheng, Aaron (1730) | Lost 0-2 | -141521 |
| 4sealed | 182 | Lam, Jason (1673) | Won 2-0 | +201541 |
| 5sealed | 112 | Tran, William (1543) | Lost 1-2 | -181523 |
| 6sealed | 361 | Meade, Larry (1454) | Lost 1-2 | -191504 |
| 7sealed | 278 | Verdugo, Mark (1497) | Won 2-0 | +181522 |
| average opponent: 1551record: 4-3 | new rating: 1522 | |||