Showell, Nathan
Current rating: 1536
Record: 10-8
| Grand Prix Portland 2018 (modern) | starting rating: 1546 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 299 | Brooks, JoVanni (1370) | Won 2-1 | +151561 |
| 2modern | 177 | McArtor, Brad (1492) | Won 2-1 | +171578 |
| 3modern | 301 | Grimes, Sean (1488) | Lost 1-2 | -201558 |
| 4modern | 265 | Vinella, John (1523) | Won 2-1 | +171575 |
| 5modern | 246 | Kusiek, James (1464) | Lost 0-2 | -201555 |
| 6modern | 406 | Feuz, John (1504) | Lost 0-2 | -191536 |
| average opponent: 1474record: 3-3 | new rating: 1536 | |||
| Grand Prix Portland 2017 (XLN standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 88 | Zell, Susan (1511) | Lost 1-2 | -181482 |
| 2standard | 550 | Nelson, Ben (1530) | Lost 0-2 | -171465 |
| 3standard | 791 | Gilbert, Tyson (1356) | Won 2-1 | +161481 |
| 4standard | 659 | Kelly, Justin (1457) | Won 2-1 | +181499 |
| 5standard | 386 | Wheelhouse, Alton (1471) | Won 2-0 | +171516 |
| 6standard | 348 | Hawkins, Donald (1497) | Lost 1-2 | -181498 |
| 7standard | 478 | Edwards-Silva, Malcolm (1496) | Won 2-1 | +181516 |
| 8standard | 290 | Gardner, Robert (1516) | Won 2-0 | +181534 |
| 9standard | 269 | Gomez, Douglas (1659) | Won 2-1 | +201554 |
| 10standard | 114 | Nguyen, Kevin (1651) | Won 2-1 | +201574 |
| 11standard | 71 | Pardee, Samuel (2075) | Lost 0-2 | -101564 |
| 12standard | 139 | Tovar, Forrest (1559) | Lost 1-2 | -181546 |
| average opponent: 1565record: 7-5 | new rating: 1546 | |||