Powell, Ethan
Current rating: 1472
| Grand Prix Indianapolis 2015 (BFZ standard) | starting rating: 1470 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 300 | Ramsey, Rebekah (1544) | Won 2-1 | +191489 |
| 2standard | 46 | NePerud, Drew (1546) | Lost 0-2 | -171472 |
| 3standard | 368 | Beach, Lucas (1498) | Lost 0-2 | -171455 |
| 4standard | 385 | Donnelly, Justin (1480) | Won 2-0 | +181473 |
| 5standard | 280 | Falk, Andy (1485) | Won 2-1 | +181491 |
| 6standard | 266 | Voorhies, Franklyn (1439) | Lost 1-2 | -191472 |
| top | average opponent: 1499record: 3-3 | new rating: 1472 | ||
| Grand Prix Pittsburgh 2011 (M12 standard) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 146 | Richmond, Jonathan (1503) | Lost 0-2 | -181446 |
| 2standard | 543 | Brown, Nate (1482) | Lost 0-2 | -171429 |
| 3standard | 605 | Agirre, Mykeal (1463) | Won 2-0 | +191448 |
| 4standard | 533 | Pickens, Joshua (1478) | Won 2-1 | +181466 |
| 5standard | 350 | Ngo, Kiet (1637) | Won 2-0 | +211487 |
| 6standard | 234 | Gifford, Sean (1517) | Lost 1-2 | -171470 |
| top | average opponent: 1513record: 3-3 | new rating: 1470 | ||
| Grand Prix Nashville 2010 (SOM limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 103 | Burrows, Skott (1500) | Lost 1-2 | -181482 |
| 2sealed | 204 | Benningfield, Eric M (1482) | Lost 0-2 | -181464 |
| 3sealed | 288 | Olson, Alex R (1465) | Won 2-1 | +181482 |
| 4sealed | 291 | Sander, Jeffery M (1465) | Lost 1-2 | -181464 |
| top | average opponent: 1478record: 1-3 | new rating: 1464 | ||