Harduvel, John
Current rating: 1534
Record: 7-6-1
| Grand Prix Los Angeles 2016 (modern) | starting rating: 1551 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 80 | Samson, Jacob (1485) | Won 2-0 | +171568 |
| 2modern | 328 | Martinez, Michael (1438) | Lost 0-2 | -201548 |
| 3modern | 805 | Cardenas, Osvaldo (1589) | Lost 0-2 | -181530 |
| 4modern | 938 | McClain, Johnathan (1481) | Won 2-1 | +181548 |
| 5modern | 823 | Hu, Jonathan (1768) | Won 2-1 | +221570 |
| 6modern | 406 | Saunders, Peter (1651) | Lost 0-2 | -171553 |
| 7modern | 547 | Clark, Greg (1521) | Lost 0-2 | -191534 |
| average opponent: 1562record: 3-4 | new rating: 1534 | |||
| Grand Prix New Jersey 2014 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 3legacy | 747 | Mitchell, Billy (1539) | Won 2-1 | +191519 |
| 4legacy | 774 | Moldowsky, Jake (1598) | Won 2-0 | +191538 |
| 5legacy | 589 | Taylor, Harry (1574) | Won 2-0 | +191557 |
| 6legacy | 560 | Crist, Jason (1595) | Lost 0-2 | -171540 |
| 7legacy | 601 | Guevara, Franz (1707) | Won 2-0 | +211561 |
| 8legacy | 580 | Tsao, Dennis (1703) | Draw 1-1 | +21563 |
| 9legacy | 586 | Gottlieb, Bryan (1917) | Lost 1-2 | -121551 |
| average opponent: 1662record: 4-2-1 | new rating: 1551 | |||