Parkhurst, Mark
Current rating: 1477
Record: 8-10-2
| Grand Prix Baltimore 2014 (KTK limited) | starting rating: 1477 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 114 | Llodra, Juan Pablo (1467) | Draw 1-1 | 01477 |
| 2sealed | 290 | Luellen, Matthew (1572) | Draw 1-1 | +21479 |
| 3sealed | 498 | Wobig, Damien (1465) | Lost 1-2 | -181461 |
| 4sealed | 525 | Schneider, Thomas (1361) | Won 2-1 | +161477 |
| top | average opponent: 1466record: 1-1-2 | new rating: 1477 | ||
| Grand Prix New Jersey 2014 (legacy) | starting rating: 1473 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 1743 | Rosenkrans, David (1500) | Lost 1-2 | -181455 |
| 2legacy | 1810 | Fatale, Joey (1462) | Won 2-0 | +181473 |
| 3legacy | 1919 | Hansen, Chase (1657) | Lost 0-2 | -141459 |
| 4legacy | 1865 | Thatch, Jonathan (1538) | Won 2-0 | +191478 |
| 5legacy | 1725 | Given, Zach (1502) | Won 2-1 | +181496 |
| 6legacy | 1706 | Wise, Peter (1437) | Lost 0-2 | -191477 |
| top | average opponent: 1516record: 3-3 | new rating: 1477 | ||
| Grand Prix Washington DC 2014 (JOU limited) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 214 | Povio, Vincent (1500) | Won 2-0 | +191483 |
| 2sealed | 147 | Istfan, Raeef (1657) | Won 2-0 | +211504 |
| 3sealed | 179 | Barnett, Tyler (1556) | Lost 1-2 | -171487 |
| 4sealed | 281 | Clark, Dan (1641) | Lost 0-2 | -151472 |
| 5sealed | 349 | Nikoula, Mark (1508) | Won 2-1 | +181490 |
| 6sealed | 341 | Kumor, Patrick (1514) | Lost 1-2 | -171473 |
| top | average opponent: 1563record: 3-3 | new rating: 1473 | ||
| Grand Prix Washington DC 2010 (ROE standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 91 | Finney, Dell (1500) | Lost 0-2 | -181482 |
| 2standard | 289 | Haurie, Sam (1482) | Won 2-0 | +181500 |
| 3standard | 275 | Janiga, Joseph (1500) | Lost 0-2 | -181482 |
| 4standard | 334 | King, Anthony (1479) | Lost 0-2 | -181464 |
| top | average opponent: 1490record: 1-3 | new rating: 1464 | ||