Griffiths, Sam
Current rating: 1536
| Grand Prix Manchester 2016 (SOI standard) | starting rating: 1522 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 13 | Harman, Jack (1602) | Won 2-1 | +191541 |
| 2standard | 184 | Williamson, Alistair (1517) | Won 2-0 | +181559 |
| 3standard | 165 | Christiansen, Jeppe Brandt (1487) | Lost 0-2 | -201539 |
| 4standard | 447 | Johnson, Chris [ENG] (1556) | Won 2-0 | +191558 |
| 5standard | 153 | Wightman, Robert (1466) | Draw 1-1 | -21556 |
| 6standard | 256 | Riley, Neil (1456) | Lost 1-2 | -201536 |
| top | average opponent: 1514record: 3-2-1 | new rating: 1536 | ||
| Grand Prix Utrecht 2015 (MM2 limited) | starting rating: 1516 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 2034 | Van Tendeloo, Pim (1500) | Won 2-1 | +171533 |
| 2sealed | 2221 | Ravenshear, Stuart (1620) | Lost 0-2 | -161517 |
| 3sealed | 2335 | Nobre, Carlos (1535) | Won 2-0 | +181535 |
| 4sealed | 2156 | Hinrichsen, Jesper (1575) | Won 2-1 | +191554 |
| 5sealed | 2070 | Klimes, Tomas (1833) | Lost 1-2 | -131541 |
| 6sealed | 2149 | Behm, Dominik (1482) | Lost 1-2 | -191522 |
| top | average opponent: 1591record: 3-3 | new rating: 1522 | ||
| Grand Prix Manchester 2014 (Theros block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 2 | Belcher, Rosie (1500) | Won 2-0 | +181518 |
| 2block | 322 | Johns, Darryl (1466) | Won 2-1 | +171535 |
| 3block | 125 | Royde, Daniel (1625) | Won 2-1 | +201555 |
| 4block | 310 | Rodriguez, Bert (1460) | Lost 0-2 | -201535 |
| 5block | 278 | Powell, Richard (1439) | Won 2-0 | +161551 |
| 6block | 127 | Brown, Daniel [ENG] (1549) | Lost 1-2 | -181533 |
| 7block | 151 | Patel, Kayure (1552) | Lost 0-2 | -171516 |
| top | average opponent: 1513record: 4-3 | new rating: 1516 | ||