Mamrak, Jeffrey
Current rating: 1518
Record: 3-2-1
| Grand Prix Washington DC 2010 (ROE standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 898 | Hixson, Travis S (1500) | Draw 1-1 | 01500 |
| 2standard | 848 | Prioletti, Anthony D (1499) | Lost 0-2 | -181482 |
| 3standard | 955 | Corcoran, Daniel (1481) | Won 2-1 | +181500 |
| 4standard | 893 | Horne, Devon (1499) | Won 2-0 | +181518 |
| 5standard | 801 | Helms, Sterling (1518) | Won 2-0 | +181536 |
| 6standard | 723 | Gress, David (1537) | Lost 0-2 | -181518 |
| average opponent: 1506record: 3-2-1 | new rating: 1518 | |||