Guess, Brian
Current rating: 1473
Record: 18-24
| Grand Prix Atlanta 2017 (XLN standard) | starting rating: 1473 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 421 | Kiser, Nathan (1500) | Lost 1-2 | -181455 |
| 2standard | 461 | Bracken, Ashley (1481) | Won 2-1 | +191474 |
| 3standard | 416 | Slone, William (1502) | Won 2-0 | +181492 |
| 4standard | 346 | Usman, Nick (1609) | Won 2-0 | +211513 |
| 5standard | 290 | Sears, Rob (1538) | Lost 0-2 | -181495 |
| 6standard | 357 | Kassis, Eli (2093) | Lost 1-2 | -81487 |
| 7standard | 328 | Wade, Brian (1731) | Lost 0-2 | -141473 |
| top | average opponent: 1636record: 3-4 | new rating: 1473 | ||
| Grand Prix Louisville 2017 (legacy) | starting rating: 1377 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 359 | Smith, Derrik (1542) | Won 2-0 | +211398 |
| 2legacy | 628 | West, Zachary (1593) | Won 2-0 | +211419 |
| 3legacy | 624 | Lloyd, Andrew (1412) | Won 2-1 | +181437 |
| 4legacy | 464 | Nelson, Brad (2008) | Lost 0-2 | -81429 |
| 5legacy | 575 | Rouse, Bobby (1454) | Won 2-0 | +181447 |
| 6legacy | 415 | Peters, Kyle (1843) | Lost 0-2 | -111436 |
| 7legacy | 574 | Chen, Zhemin (1663) | Won 2-0 | +221458 |
| 8legacy | 473 | McAleer, Jeff (1653) | Won 2-1 | +211479 |
| 9legacy | 390 | Rice, Jason (1503) | Won 2-0 | +191498 |
| 10legacy | 1058 | Hand, Josh (1582) | Lost 1-2 | -171481 |
| 11legacy | 1151 | Clark, Taylor (1676) | Won 2-1 | +221503 |
| 12legacy | 1070 | Parshall, William (1581) | Lost 0-2 | -171486 |
| 13legacy | 1118 | O'Bryant, Christopher (1748) | Lost 1-2 | -131473 |
| top | average opponent: 1635record: 8-5 | new rating: 1473 | ||
| Grand Prix Charlotte 2016 (modern) | starting rating: 1439 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 499 | Wentz, Jake (1470) | Lost 1-2 | -181421 |
| 4modern | 113 | McKay, Zachary (1597) | Lost 1-2 | -141407 |
| 5modern | 563 | Perel, Erik (1431) | Lost 1-2 | -181389 |
| 6modern | 330 | Niece, Lee (1716) | Lost 0-2 | -121377 |
| top | average opponent: 1554record: 0-4 | new rating: 1377 | ||
| Grand Prix New Jersey 2014 (legacy) | starting rating: 1470 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 1540 | Polvino, Matthew (1644) | Lost 1-2 | -151455 |
| 2legacy | 1798 | Diaz, Alan (1482) | Lost 0-2 | -171438 |
| 3legacy | 2005 | Aba, Christopher (1464) | Won 2-1 | +181456 |
| 4legacy | 1912 | Vernon, Jared (1482) | Lost 0-2 | -171439 |
| top | average opponent: 1518record: 1-3 | new rating: 1439 | ||
| Grand Prix Atlanta 2011 (extended) | starting rating: 1469 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 101 | Henkel, Matt R (1500) | Won 2-1 | +181487 |
| 2extended | 50 | Shields, Jharick (1494) | Lost 1-2 | -181469 |
| 3extended | 124 | Kieper, Jeff (1499) | Won 2-0 | +191488 |
| 4extended | 111 | Griffin, Matthew [USA] (1472) | Lost 1-2 | -181470 |
| 5extended | 175 | Tucker, Bo (1483) | Won 2-1 | +181488 |
| 6extended | 167 | Samson, Daniel (1509) | Lost 0-2 | -181470 |
| top | average opponent: 1493record: 3-3 | new rating: 1470 | ||
| Grand Prix Tampa 2009 (ZEN limited) | starting rating: 1466 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 122 | Wall, Douglas (1500) | Won 2-0 | +181484 |
| 2sealed | 66 | Krug, Andrew (1510) | Lost 0-2 | -171467 |
| 3sealed | 162 | Galloway, Kevin (1502) | Lost 0-2 | -181449 |
| 4sealed | 276 | suhl, donald r (1484) | Won 2-1 | +191468 |
| 5sealed | 256 | Benson, Mike (1485) | Won 2-1 | +181486 |
| 6sealed | 192 | Peters, Douglas (1505) | Lost 1-2 | -171469 |
| top | average opponent: 1498record: 3-3 | new rating: 1469 | ||
| Grand Prix Atlanta 2008 (ALA limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 156 | Brady, Michael (1589) | Lost 0-2 | -161484 |
| 2sealed | 260 | Ortiz, Gus (1483) | Lost 0-2 | -181466 |
| top | average opponent: 1536record: 0-2 | new rating: 1466 | ||