Layton, Mark
Current rating: 1416
Record: 1-6
| Grand Prix Sacramento 2018 (M19 limited) | starting rating: 1450 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 170 | Lin, Yee-Way (1394) | Won 2-1 | +171467 |
| 2sealed | 288 | Salvagione, Rachel (1518) | Lost 1-2 | -171450 |
| 3sealed | 403 | Pereira Calheiros Junior, Ailton (1504) | Lost 1-2 | -171433 |
| 4sealed | 531 | Fu, Justin (1483) | Lost 1-2 | -171416 |
| average opponent: 1475record: 1-3 | new rating: 1416 | |||
| Grand Prix Portland 2017 (XLN standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 80 | Chao, Christopher (1520) | Lost 0-2 | -181482 |
| 2standard | 485 | Durkee, John (1482) | Lost 1-2 | -181464 |
| 3standard | 756 | Goles, Nicolas (1663) | Lost 0-2 | -141450 |
| average opponent: 1555record: 0-3 | new rating: 1450 | |||