Cook, Ethan
Current rating: 1555
Record: 11-9
| Grand Prix Memphis 2019 (RNA standard) | starting rating: 1579 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 50 | Lewsader, Dave (1572) | Lost 0-2 | -191560 |
| 2standard | 310 | Bishop, Elijah (1528) | Won 2-0 | +181578 |
| 3standard | 303 | Costner, Gary (1500) | Lost 0-2 | -201558 |
| 4standard | 431 | Rayborn, Landon (1483) | Won 2-0 | +171575 |
| 5standard | 336 | Ranney, Ryan (1455) | Lost 0-2 | -201555 |
| average opponent: 1508record: 2-3 | new rating: 1555 | |||
| Grand Prix Memphis 2018 (RIX standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 126 | Meade, Chauncey (1504) | Won 2-1 | +181518 |
| 2standard | 146 | Porges, Charles (1476) | Lost 0-2 | -191499 |
| 3standard | 304 | Crone, Jacob (1500) | Won 2-0 | +181517 |
| 4standard | 138 | Lynch, Corey (1577) | Won 2-1 | +191536 |
| 5standard | 211 | Parmer, Brandon (1626) | Won 2-0 | +201556 |
| 6standard | 140 | Froehlich, Athena (1705) | Won 2-0 | +211577 |
| 7standard | 55 | Neris, Jose (1808) | Won 2-1 | +221599 |
| 8standard | 13 | Lewis, Matthew [USA] (1566) | Lost 0-2 | -191580 |
| 9standard | 104 | Blankenship, Arthur (1883) | Won 2-1 | +241604 |
| 10standard | 68 | Yeh, Chih-Cheng (1978) | Lost 1-2 | -121592 |
| 11standard | 77 | Soorani, Shaheen (1988) | Lost 1-2 | -111581 |
| 12standard | 82 | O'Hollearn, Zachary (1576) | Lost 0-2 | -181563 |
| 13standard | 91 | Powell, Shelton (1476) | Won 2-0 | +161579 |
| 14standard | 78 | Chiang, Will (1546) | Won 2-0 | +181597 |
| 15standard | 69 | Chaves, Rodrigo (1585) | Lost 1-2 | -181579 |
| average opponent: 1653record: 9-6 | new rating: 1579 | |||