Brown, Mark S
Current rating: 1477
Record: 4-6
| Grand Prix Orlando 2014 (KTK limited) | starting rating: 1463 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 75 | Blelloch, David N (1540) | Won 2-0 | +191482 |
| 4sealed | 92 | Tanner, Charles (1645) | Lost 0-0 | -151467 |
| 5sealed | 174 | Nicholson, Ewan (1536) | Lost 1-2 | -171450 |
| 6sealed | 161 | Coursey, Benjamin (1571) | Won 2-1 | +211471 |
| 7sealed | 156 | Roberts, William R (1551) | Won 2-0 | +191490 |
| 8sealed | 90 | Saporito, Thiago (1757) | Lost 0-2 | -131477 |
| average opponent: 1600record: 3-3 | new rating: 1477 | |||
| Grand Prix Miami 2013 (DGM standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 269 | Guglielmo, Mario (1466) | Won 2-0 | +171517 |
| 2standard | 58 | Velando, Luis M (1482) | Lost 1-2 | -181499 |
| 3standard | 327 | Welch, Chris (1500) | Lost 1-2 | -181481 |
| 4standard | 454 | Ambert, Lou Erik (1483) | Lost 1-2 | -181463 |
| average opponent: 1483record: 1-3 | new rating: 1463 | |||