Williams, Gareth
Current rating: 1462
| Grand Prix Brussels 2020 (pioneer) | starting rating: 1457 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 252 | Harte, Ruud (1338) | Won 2-1 | +161473 |
| 2pioneer | 272 | Badenberg, Leonhard (1558) | Won 2-1 | +191492 |
| 3pioneer | 31 | Schefter, Valentin (1490) | Lost 1-2 | -181474 |
| 4pioneer | 514 | Verhulsdonk, Jan (1475) | Lost 1-2 | -181456 |
| 5pioneer | 526 | Billondeau, Julien (1494) | Won 2-0 | +191475 |
| 6pioneer | 347 | Meijers, Vincent (1769) | Lost 1-2 | -131462 |
| top | average opponent: 1521record: 3-3 | new rating: 1462 | ||
| Grand Prix Barcelona 2019 (modern) | starting rating: 1469 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 376 | Garabatos Funes, Enzo (1500) | Lost 1-2 | -181451 |
| 2modern | 412 | Puschnik, Sebastian (1487) | Won 2-0 | +191470 |
| 3modern | 504 | Neef, Torben (1501) | Won 2-0 | +181488 |
| 4modern | 448 | Perez, Oscar (1538) | Lost 0-2 | -171471 |
| 5modern | 375 | Jimenez Martinez, Javier (1674) | Lost 1-2 | -141457 |
| top | average opponent: 1540record: 2-3 | new rating: 1457 | ||
| Grand Prix London 2018 (RIX limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 35 | King, Stuart (1572) | Lost 0-2 | -171483 |
| 2sealed | 596 | Lyford-Smith, David (1598) | Lost 0-2 | -161467 |
| 3sealed | 872 | Sharman, David (1535) | Lost 1-2 | -161451 |
| 4sealed | 922 | Chapman, Matt (1446) | Won 2-0 | +181469 |
| top | average opponent: 1538record: 1-3 | new rating: 1469 | ||