Tuell, David
Current rating: 1473
Record: 4-6
| Grand Prix Richmond 2014 (modern) | starting rating: 1509 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 419 | Redas, Jeff (1500) | Lost 1-2 | -181491 |
| 2modern | 473 | Biever, Marshall (1535) | Won 2-1 | +191510 |
| 3modern | 334 | Sherwood, Nicholas (1500) | Lost 0-2 | -191491 |
| 4modern | 542 | Lipinski, Stanley (1482) | Lost 0-2 | -181473 |
| average opponent: 1504record: 1-3 | new rating: 1473 | |||
| Grand Prix Washington DC 2010 (ROE standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 839 | Fitzgerald, Zachary (1500) | Lost 1-2 | -181482 |
| 2standard | 955 | Perkins, Andrew (1542) | Won 2-1 | +191501 |
| 3standard | 914 | Baker, JC (1500) | Won 2-0 | +181519 |
| 4standard | 826 | Leitzinger, Gerald (1589) | Won 2-1 | +191538 |
| 5standard | 770 | King, Stephen (1897) | Lost 1-2 | -111527 |
| 6standard | 810 | Ripley, Peter (1545) | Lost 0-2 | -181509 |
| average opponent: 1595record: 3-3 | new rating: 1509 | |||