Barrett, Matthew
Current rating: 1392
| Grand Prix Indianapolis 2017 (HOU limited) | starting rating: 1444 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 23 | Heidorn, Greg (1500) | Lost 1-2 | -171427 |
| 2sealed | 405 | Clark, Michael (1411) | Lost 0-2 | -181409 |
| 3sealed | 504 | Pujols, Joshua (1466) | Lost 0-2 | -171392 |
| top | average opponent: 1459record: 0-3 | new rating: 1392 | ||
| Grand Prix Pittsburgh 2013 (GTC limited) | starting rating: 1518 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 223 | Derrick, Samuel (1473) | Lost 0-2 | -191499 |
| 2sealed | 649 | [anonymous] | Lost 1-2 | -181481 |
| 3sealed | 675 | Novakowski, George (1448) | Lost 0-2 | -191462 |
| 4sealed | 695 | Ellenberger, Nathan (1444) | Lost 0-2 | -181444 |
| top | average opponent: 1463record: 0-4 | new rating: 1444 | ||
| Grand Prix Orlando 2012 (ISD standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 85 | Binsky, Joshua (1500) | Won 2-0 | +181518 |
| 2standard | 125 | Gilbert, Timothy L (1498) | Lost 0-2 | -181500 |
| 3standard | 257 | Hayek, George (1523) | Won 2-1 | +181518 |
| 4standard | 188 | Hendricks, Ryan (1628) | Lost 1-2 | -161502 |
| 5standard | 314 | Longhurst, Kenneth (1499) | Won 2-0 | +181520 |
| 6standard | 283 | Foster, Jeph (1463) | Won 2-1 | +171537 |
| 7standard | 107 | Sprouse, Joseph (1483) | Won 2-1 | +171554 |
| 8standard | 114 | Henry, Jake E (1556) | Lost 1-2 | -181536 |
| 9standard | 171 | Creighton, Ralph (1542) | Lost 0-2 | -181518 |
| top | average opponent: 1521record: 5-4 | new rating: 1518 | ||