Barker, Robert H
Current rating: 1455
| Grand Prix Miami 2013 (DGM standard) | starting rating: 1450 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 11 | Fernandez, Jose (1483) | Lost 1-2 | -181432 |
| 2standard | 321 | Simpson-Black, Mark (1472) | Won 2-0 | +191451 |
| 3standard | 417 | Caito, Steven (1500) | Lost 1-2 | -171434 |
| 4standard | 540 | Lear, Patrick (1500) | Won 2-0 | +191453 |
| 5standard | 335 | Connor, Andrew (1578) | Won 2-0 | +211474 |
| 6standard | 228 | Serradell, Juan (1416) | Lost 0-2 | -191455 |
| top | average opponent: 1492record: 3-3 | new rating: 1455 | ||
| Grand Prix Atlanta 2012 (legacy) | starting rating: 1463 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 180 | Peck, Jordan (1500) | Won 2-0 | +191482 |
| 2legacy | 29 | Vincent, Adam (1496) | Lost 0-2 | -181464 |
| 3legacy | 182 | Fondren, Roger (1493) | Won 2-1 | +191483 |
| 4legacy | 281 | Bauer, David (1619) | Lost 1-2 | -161467 |
| 5legacy | 351 | Brewster, John (1498) | Lost 1-2 | -171450 |
| top | average opponent: 1521record: 2-3 | new rating: 1450 | ||
| Grand Prix Orlando 2012 (ISD standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 73 | Foster, Ryland E (1500) | Lost 0-2 | -181482 |
| 2standard | 315 | Ward, David (1482) | Won 2-0 | +181500 |
| 3standard | 277 | Brickey, Christopher (1483) | Lost 1-2 | -181482 |
| 4standard | 371 | Suarez, Ruben A (1464) | Lost 0-2 | -191463 |
| top | average opponent: 1482record: 1-3 | new rating: 1463 | ||