Mayes, Simon
Current rating: 1499
| Grand Prix London 2015 (ORI standard) | starting rating: 1513 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 465 | VanMeter, Chris (1876) | Won 2-1 | +241537 |
| 4standard | 99 | Sacco, Sergio (1253) | Lost 1-2 | -231514 |
| 5standard | 187 | Bean, Byron (1547) | Won 2-1 | +191533 |
| 6standard | 115 | Lee, Wen Jie (1646) | Lost 1-2 | -161517 |
| 7standard | 149 | Boyhan, Aaron (1534) | Lost 0-2 | -181499 |
| top | average opponent: 1571record: 2-3 | new rating: 1499 | ||
| Grand Prix Liverpool 2015 (FRF limited) | starting rating: 1545 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 73 | Jackson, Stuart (1454) | Lost 1-2 | -191526 |
| 3sealed | 428 | Hall, William (1547) | Lost 0-2 | -181508 |
| 4sealed | 755 | Morton, David (1481) | Won 2-0 | +181526 |
| 5sealed | 518 | Angeli, Alessio (1807) | Lost 0-2 | -131513 |
| top | average opponent: 1572record: 1-3 | new rating: 1513 | ||
| Grand Prix Manchester 2014 (Theros block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2block | 317 | Watson, Chloe (1463) | Lost 1-2 | -191481 |
| 3block | 441 | Tang, Frederic (1524) | Won 2-0 | +191500 |
| 4block | 349 | Zull, Stephan (1481) | Lost 1-2 | -181482 |
| 5block | 438 | Fletcher, Joel (1501) | Won 2-1 | +181500 |
| 6block | 280 | Powell, David (1515) | Won 2-0 | +181518 |
| 7block | 198 | Kaye, Leo (1535) | Won 2-1 | +191537 |
| 8block | 158 | Voss, Jonathan (1621) | Won 2-1 | +191556 |
| 9block | 268 | Molle, Niels (1669) | Won 2-0 | +201576 |
| 10block | 55 | Coleman, Ben (1634) | Lost 0-2 | -171559 |
| 11block | 65 | Sutcliffe, David (1627) | Lost 0-2 | -161543 |
| 12block | 71 | Greenwood, David (1659) | Won 2-1 | +201563 |
| 13block | 62 | Walton, Alex (1574) | Won 2-1 | +181581 |
| 14block | 45 | Brandt, Sebastian (1588) | Lost 0-2 | -181563 |
| 15block | 62 | Burchett, Autumn (1585) | Lost 1-2 | -181545 |
| top | average opponent: 1570record: 8-6 | new rating: 1545 | ||