Howells, Justin
Current rating: 1460
Record: 9-12-1
| Grand Prix Las Vegas 2019 (modern) (modern) | starting rating: 1511 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 226 | Sutherin, Brian (1500) | Lost 1-2 | -181493 |
| 2modern | 488 | Triplett, Leslie (1376) | Lost 1-2 | -201473 |
| 3modern | 824 | Shattuck, Lawrence (1463) | Won 2-0 | +181491 |
| 4modern | 601 | Panhorst, Livingston (1637) | Lost 1-2 | -161475 |
| 5modern | 696 | Folsom, Riley (1619) | Lost 0-2 | -151460 |
| top | average opponent: 1519record: 1-4 | new rating: 1460 | ||
| Grand Prix Las Vegas 2017 (modern) (modern) | starting rating: 1505 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 590 | Anderson, Austin (1500) | Won 2-0 | +181523 |
| 2modern | 32 | Stahl, Rasmus (1654) | Won 2-1 | +211544 |
| 3modern | 63 | Lincoln, Robert (1552) | Won 2-1 | +181562 |
| 4modern | 250 | Song, Kai (1522) | Lost 0-2 | -191543 |
| 5modern | 630 | Borakove, Steven (1725) | Lost 0-2 | -151528 |
| 6modern | 778 | Mohr, Charles (1586) | Won 2-1 | +191547 |
| 7modern | 469 | Sawatari, Kai (1581) | Lost 0-2 | -171530 |
| 8modern | 727 | Vance, Edward (1483) | Lost 0-2 | -191511 |
| top | average opponent: 1575record: 4-4 | new rating: 1511 | ||
| Grand Prix Denver 2016 (KLD standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 438 | Morales, Mario (1500) | Draw 1-1 | 01500 |
| 2standard | 354 | Robertson, Tate (1487) | Lost 1-2 | -181482 |
| 3standard | 630 | Davies, Karen (1587) | Won 2-1 | +201502 |
| 4standard | 491 | Simms, Frederick (1488) | Won 2-0 | +171519 |
| 5standard | 350 | Smith, Mason (1488) | Won 0-0 | +181537 |
| 6standard | 225 | Hedgpeth, Justin (1573) | Won 2-1 | +191556 |
| 7standard | 138 | Simms, Jason (1709) | Lost 1-2 | -161540 |
| 8standard | 248 | Bulthaup, Bryan (1613) | Lost 1-2 | -161524 |
| 9standard | 313 | Fagan, Christian (1508) | Lost 0-2 | -191505 |
| top | average opponent: 1550record: 4-4-1 | new rating: 1505 | ||