Duke, Mark
Current rating: 1506
Record: 5-5
| Grand Prix Los Angeles 2016 (modern) | starting rating: 1480 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 44 | Mixon, Eric (1604) | Lost 1-2 | -151465 |
| 2modern | 656 | Barajas, Jose (1482) | Lost 0-2 | -181447 |
| 3modern | 1069 | Berumen, Adolfo (1463) | Won 2-0 | +181465 |
| 4modern | 811 | Vargas, Jonathan (1466) | Won 2-1 | +181483 |
| 5modern | 806 | Brophy, Shawn (1500) | Won 2-1 | +191502 |
| 6modern | 393 | Obejas, Ammi (1717) | Lost 1-2 | -151487 |
| 7modern | 572 | Lerer, Josef (1503) | Lost 0-2 | -171470 |
| 8modern | 606 | Epstein, Cal (1482) | Won 2-0 | +181488 |
| 9modern | 514 | Lopez, Jeffrey (1501) | Won 2-0 | +181506 |
| average opponent: 1524record: 5-4 | new rating: 1506 | |||
| Grand Prix Los Angeles 2014 (KTK standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 153 | Garcia, Angel (1407) | Lost 0-2 | -201480 |
| record: 0-1 | new rating: 1480 | |||