Duncan, Frederick
Current rating: 1597
Record: 22-16
| Grand Prix Las Vegas 2018 (modern) (modern) | starting rating: 1601 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 415 | Wilmot, Jeremy (1442) | Won 2-1 | +151616 |
| 2modern | 439 | Macias, Mason (1418) | Won 2-0 | +151631 |
| 3modern | 264 | Smyth, Jason (1806) | Lost 0-2 | -151616 |
| 4modern | 687 | Chatham, Charles (1565) | Lost 0-2 | -191597 |
| top | average opponent: 1558record: 2-2 | new rating: 1597 | ||
| Grand Prix Los Angeles 2016 (modern) | starting rating: 1566 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 235 | Baumgartner, Wolfgang (1500) | Lost 1-2 | -191547 |
| 2modern | 599 | Gee, Steven (1481) | Won 2-1 | +171564 |
| 3modern | 518 | Magdaleno, Mike (1556) | Won 2-0 | +181582 |
| 4modern | 587 | Hunter, James (1518) | Won 2-1 | +171599 |
| 5modern | 437 | Brito, Devon (1481) | Won 2-0 | +161615 |
| 6modern | 174 | Eckhoff, Trevor (1650) | Lost 1-2 | -181597 |
| 7modern | 418 | Batinich, Andrew (1629) | Won 2-1 | +191616 |
| 8modern | 194 | Atienza, Edgar (1558) | Won 2-1 | +171633 |
| 9modern | 165 | McShea, Kevin (1887) | Lost 0-2 | -141619 |
| 10modern | 162 | Boyd, Nathan (1619) | Lost 0-2 | -181601 |
| top | average opponent: 1588record: 6-4 | new rating: 1601 | ||
| Grand Prix Las Vegas 2015 (1) (MM2 limited) | starting rating: 1573 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 15 | Doumit, Drake (1500) | Lost 0-2 | -191554 |
| 2sealed | 189 | Boccardo, John (1479) | Won 2-1 | +161570 |
| 3sealed | 184 | Cowan, Dennis (1482) | Won 2-1 | +171587 |
| 4sealed | 84 | Cruz, Rene (1501) | Won 2-1 | +161603 |
| 5sealed | 107 | Matthews, Mark (1607) | Won 2-1 | +181621 |
| 6sealed | 56 | Powell, Jason (1545) | Lost 0-2 | -191602 |
| 7sealed | 80 | Mondello, Jake (1789) | Lost 1-2 | -151587 |
| 8sealed | 101 | Abernathy, Cole (1440) | Lost 0-2 | -211566 |
| top | average opponent: 1543record: 4-4 | new rating: 1566 | ||
| Grand Prix Portland 2013 (modern) | starting rating: 1535 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 245 | Lopez, Damien (1495) | Won 2-1 | +171552 |
| 2modern | 129 | Koessel, Noah (1748) | Lost 0-2 | -141538 |
| 3modern | 245 | Cressy, Brandon (1521) | Won 2-0 | +181556 |
| 4modern | 176 | Landweber, Joseph (1484) | Lost 0-2 | -201536 |
| 5modern | 255 | Mortensen, Dan (1501) | Won 2-1 | +181554 |
| 6modern | 115 | Stehman, Cole (1524) | Won 2-0 | +171571 |
| 7modern | 126 | Layher, Kris (1537) | Won 2-1 | +171588 |
| 8modern | 81 | Bertiou, Simon (1725) | Lost 0-2 | -151573 |
| top | average opponent: 1567record: 5-3 | new rating: 1573 | ||
| Grand Prix Seattle-Tacoma 2012 (DKA limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 80 | Andrassy, D'Artagnon (1500) | Lost 0-2 | -181482 |
| 2sealed | 378 | Sangha, Manvir (1505) | Lost 1-2 | -181464 |
| 3sealed | 455 | Williams, Liam (1466) | Won 2-1 | +181482 |
| 4sealed | 500 | JONGEWARD, DANIEL J (1482) | Won 2-1 | +181500 |
| 5sealed | 344 | Carl, Derek A (1499) | Won 2-1 | +181518 |
| 6sealed | 266 | Brokenshire, Emelee (1520) | Won 2-0 | +181536 |
| 7sealed | 119 | Martell, Matthew (1535) | Won 2-1 | +181554 |
| 8sealed | 87 | Zheng, Alan (1482) | Lost 0-2 | -191535 |
| top | average opponent: 1499record: 5-3 | new rating: 1535 | ||