Duvall, James
Current rating: 1556
Record: 9-7
| Grand Prix Las Vegas 2018 (modern) (modern) | starting rating: 1521 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 99 | Cox, Andrew (1374) | Won 2-1 | +161537 |
| 2modern | 424 | Becker, Shawn (1630) | Won 2-0 | +191556 |
| top | average opponent: 1502record: 2-0 | new rating: 1556 | ||
| Grand Prix Las Vegas 2017 (modern) (modern) | starting rating: 1551 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 2 | Khare, Anand (2000) | Lost 1-2 | -101541 |
| 4modern | 451 | Clausen, Joe (1520) | Won 2-0 | +171558 |
| 5modern | 414 | Chatel, Cedric (1456) | Lost 1-2 | -191539 |
| 6modern | 590 | Razzaboni, Mark (1582) | Lost 1-2 | -181521 |
| top | average opponent: 1640record: 1-3 | new rating: 1521 | ||
| Grand Prix Los Angeles 2016 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 516 | Calvin, Nathan (1640) | Won 2-1 | +211521 |
| 2modern | 161 | Mann, Elliot (1518) | Won 2-0 | +171538 |
| 3modern | 324 | Raugstad, Oddvar (1671) | Lost 1-2 | -151523 |
| 4modern | 363 | Jones, Oscar (1693) | Won 2-0 | +211544 |
| 5modern | 439 | Nguyen, Joe (1629) | Won 2-0 | +201564 |
| 6modern | 234 | Goslar, Matthew (1654) | Won 2-0 | +191583 |
| 7modern | 138 | Bui, Alex (1560) | Won 2-1 | +181601 |
| 8modern | 96 | Carson, Erik (1808) | Lost 1-2 | -151586 |
| 9modern | 97 | Garcia, Scott (1573) | Lost 0-2 | -181568 |
| 10modern | 291 | Abong, Jason (1619) | Lost 0-2 | -171551 |
| top | average opponent: 1637record: 6-4 | new rating: 1551 | ||