Cowell, Andrew
Current rating: 1484
| Grand Prix Detroit 2019 (M20 limited) | starting rating: 1459 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 43 | Olds, Patrick (1573) | Lost 1-2 | -161443 |
| 2sealed | 255 | Kirin, Michael (1444) | Won 2-0 | +181461 |
| 3sealed | 222 | Corte, Donald (1513) | Lost 1-2 | -171444 |
| 4sealed | 295 | Beernink, Riley (1504) | Lost 0-2 | -171427 |
| 5sealed | 272 | Marshall, Jake (1465) | Won 2-0 | +191446 |
| 6sealed | 210 | Wagner, Bob (1566) | Draw 1-1 | +21448 |
| 7sealed | 178 | Schultz, Lucas (1486) | Won 2-1 | +191467 |
| 8sealed | 134 | Stettler, Justin (1403) | Won 2-0 | +171484 |
| top | average opponent: 1494record: 4-3-1 | new rating: 1484 | ||
| Grand Prix Indianapolis 2016 (modern) | starting rating: 1471 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 83 | Cubenas, Chris (1618) | Won 2-0 | +211492 |
| 2modern | 277 | Tang, Jonathan (1482) | Lost 1-2 | -181474 |
| 3modern | 691 | Johns, Sebastian (1500) | Lost 0-2 | -181456 |
| 4modern | 861 | Ferguson, Scott (1514) | Won 2-0 | +191475 |
| 5modern | 641 | Barbel, Noah (1499) | Won 2-1 | +191494 |
| 6modern | 308 | Alfarah, Michael (1620) | Won 2-1 | +201514 |
| 7modern | 324 | Eckard, Devin (1491) | Lost 0-2 | -181496 |
| 8modern | 503 | Blankespoor, Mitch (1517) | Lost 1-2 | -181478 |
| 9modern | 428 | Kroeger, Brett (1419) | Lost 1-2 | -191459 |
| top | average opponent: 1518record: 4-5 | new rating: 1459 | ||
| Grand Prix Detroit 2016 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 507 | Ganger, John (1657) | Lost 1-2 | -151485 |
| 2modern | 920 | Harry, Nick (1508) | Won 2-1 | +181503 |
| 3modern | 692 | DiLoreto, Christopher (1502) | Lost 0-2 | -181485 |
| 4modern | 1098 | Palmer, Ryan (1486) | Won 2-0 | +181503 |
| 5modern | 652 | Pait, Chris (1779) | Lost 0-2 | -131490 |
| 6modern | 811 | Wilson, Billie (1377) | Won 2-1 | +161506 |
| 7modern | 670 | Moss, Rodger (1524) | Lost 0-2 | -181488 |
| 8modern | 705 | Vasil, Jeremy (1540) | Lost 0-2 | -171471 |
| top | average opponent: 1547record: 3-5 | new rating: 1471 | ||