Duffin, Thomas
Current rating: 1295
Record: 10-25
| Grand Prix Birmingham 2019 (modern) | starting rating: 1335 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 81 | Martin, David [ENG] (1490) | Lost 0-2 | -151320 |
| 4modern | 81 | Ganz, Andreas (1700) | Lost 1-2 | -121308 |
| 5modern | 81 | Vanhatupa, Juha-Matti (1558) | Lost 0-2 | -131295 |
| top | average opponent: 1583record: 0-3 | new rating: 1295 | ||
| Grand Prix Birmingham 2018 (std) (DOM standard) | starting rating: 1318 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 57 | Taylor, Jamie (1413) | Won 2-0 | +191337 |
| 2standard | 57 | Farrimond, Ryan (1534) | Won 2-1 | +221359 |
| 4standard | 57 | Allen, Tim (1468) | Lost 1-2 | -161343 |
| 5standard | 57 | Eggersgluss, Jarno (1570) | Won 2-1 | +221365 |
| 6standard | 57 | Cowey, Joe (1510) | Lost 0-2 | -151350 |
| 7standard | 57 | Tasselli, Pietro Anselmo (1541) | Lost 0-2 | -151335 |
| top | average opponent: 1506record: 3-3 | new rating: 1335 | ||
| Grand Prix Birmingham 2017 (modern) | starting rating: 1380 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 320 | Carroll, Adam (1500) | Lost 1-2 | -161364 |
| 2modern | 203 | Black, Dylan (1501) | Lost 0-0 | -151349 |
| 4modern | 172 | Shepherd, Mark (1486) | Lost 1-2 | -161333 |
| 5modern | 172 | Coomber, Adam (1469) | Lost 0-2 | -151318 |
| top | average opponent: 1489record: 0-4 | new rating: 1318 | ||
| Grand Prix Manchester 2016 (SOI standard) | starting rating: 1392 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 245 | Hilborne, Peter (1446) | Won 2-0 | +191411 |
| 2standard | 246 | Gordon, Joshua (1482) | Lost 1-2 | -171394 |
| 3standard | 631 | Bose, Timur (1355) | Won 2-0 | +171411 |
| 4standard | 460 | Campbell, Gary (1575) | Lost 0-2 | -151396 |
| 5standard | 618 | Pearson, Zak (1500) | Lost 0-2 | -161380 |
| top | average opponent: 1471record: 2-3 | new rating: 1380 | ||
| Grand Prix London 2015 (ORI standard) | starting rating: 1422 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 32 | Caldeira, Marlon C (1500) | Won 2-0 | +201442 |
| 2standard | 175 | Rushent, Josh (1517) | Lost 0-2 | -171425 |
| 3standard | 250 | Hardacre, Mickey (1468) | Lost 0-2 | -171408 |
| 4standard | 479 | Lockett, James (1499) | Lost 0-2 | -161392 |
| top | average opponent: 1496record: 1-3 | new rating: 1392 | ||
| Grand Prix Liverpool 2015 (FRF limited) | starting rating: 1409 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 345 | Thomas, Adam (1612) | Lost 0-2 | -141395 |
| 2sealed | 575 | Ralston, David (1482) | Won 2-0 | +191414 |
| 3sealed | 648 | Jivabhai, Jaisal (1505) | Won 2-0 | +201434 |
| 4sealed | 509 | Leal Oliva, Ana Maria (1680) | Won 2-1 | +221456 |
| 5sealed | 177 | Levitt, Olivier (1489) | Lost 0-2 | -171439 |
| 6sealed | 346 | Meeson, Richard (1517) | Lost 0-2 | -171422 |
| top | average opponent: 1548record: 3-3 | new rating: 1422 | ||
| Grand Prix Manchester 2014 (Theros block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 367 | Downie, James (1500) | Lost 0-2 | -181482 |
| 2block | 410 | Nguyen, Phi (1565) | Lost 0-2 | -161466 |
| 3block | 600 | Wattel, Olivier (1393) | Lost 0-2 | -201446 |
| 4block | 637 | Murphy, Anthony (1445) | Lost 1-2 | -181428 |
| 5block | 602 | Also, Albert (1427) | Lost 0-2 | -181410 |
| 6block | 28 | Grinstead, Ruth (1349) | Won 2-1 | +171427 |
| 7block | 451 | Miller, Anthony [ENG] (1429) | Lost 1-2 | -181409 |
| top | average opponent: 1444record: 1-6 | new rating: 1409 | ||