Powers, Marvin
Current rating: 1544
Record: 7-5-1
| Grand Prix Austin 2012 (ISD limited) | starting rating: 1462 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 222 | HART, JON (1500) | Won 2-0 | +191481 |
| 2sealed | 46 | Ramos, Ray (1553) | Lost 0-2 | -171464 |
| 3sealed | 182 | BLUNK, JASON T (1482) | Won 2-0 | +191483 |
| 4sealed | 333 | Bilodeau, Powers (1500) | Draw 1-1 | 01483 |
| 5sealed | 239 | Wilson, Jacob [USA] (1521) | Won 2-0 | +191502 |
| 6sealed | 158 | McNeely, Aaron (1671) | Won 2-1 | +211523 |
| 7sealed | 94 | Sanders, Sam (1639) | Won 2-1 | +201543 |
| 8sealed | 62 | Magelssen, Josh (1574) | Lost 0-2 | -171526 |
| 9sealed | 110 | ADAMS, JERED E (1558) | Won 2-0 | +181544 |
| average opponent: 1555record: 6-2-1 | new rating: 1544 | |||
| Grand Prix Dallas-Fort Worth 2011 (MBS standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 61 | Toups, Robert (1416) | Lost 1-2 | -201480 |
| 2standard | 397 | McPherson, Justin (1482) | Won 2-0 | +191499 |
| 3standard | 297 | Petersen, Chase (1496) | Lost 1-2 | -191480 |
| 4standard | 512 | Nicholson, Connor (1482) | Lost 0-2 | -181462 |
| average opponent: 1469record: 1-3 | new rating: 1462 | |||