Duke, Zachary
Current rating: 1439
| Grand Prix Charlotte 2015 (modern) | starting rating: 1433 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 388 | Mitra, Shomya G (1500) | Won 2-0 | +191452 |
| 2modern | 305 | Croft, Thomas E (1515) | Won 2-0 | +191471 |
| 3modern | 343 | Cochran, Hunter (1575) | Lost 1-2 | -161455 |
| 4modern | 380 | Bowyer, Jackson (1467) | Won 2-1 | +181473 |
| 5modern | 314 | Wells, Joshua (1536) | Lost 1-2 | -171456 |
| 6modern | 431 | Gihorski, Zachary (1484) | Lost 1-2 | -171439 |
| top | average opponent: 1513record: 3-3 | new rating: 1439 | ||
| Grand Prix Orlando 2014 (KTK limited) | starting rating: 1486 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 868 | Taliancich, Tony (1500) | Lost 1-2 | -181468 |
| 2sealed | 1218 | Sobieraj, Andrew (1482) | Lost 0-2 | -181450 |
| 3sealed | 513 | Mohaideen, Hassan (1463) | Lost 1-2 | -171433 |
| top | average opponent: 1482record: 0-3 | new rating: 1433 | ||
| Grand Prix Atlanta 2014 (JOU limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 430 | Peck, Benjamin (1500) | Won 2-0 | +181518 |
| 2sealed | 432 | Eaton, Ryan (1617) | Won 2-1 | +201538 |
| 3sealed | 436 | Chanaberry, William (1487) | Won 2-0 | +171555 |
| 4sealed | 360 | Newman, Nicholas (1589) | Lost 1-2 | -171538 |
| 5sealed | 397 | Boveda, Jose (1527) | Lost 1-2 | -191519 |
| 6sealed | 487 | Smith, Charles (1495) | Lost 0-2 | -181501 |
| 7sealed | 541 | Koepke, Devin (1665) | Lost 0-2 | -151486 |
| top | average opponent: 1554record: 3-4 | new rating: 1486 | ||