Duncan, Jack
Current rating: 1394
| Grand Prix Birmingham 2017 (modern) | starting rating: 1444 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 253 | Lachica, Diogo (1500) | Lost 1-2 | -171427 |
| 2modern | 538 | O'Hagan, Patrick (1437) | Lost 0-0 | -171410 |
| 3modern | 834 | Villalobos, Victor (1556) | Lost 1-2 | -161394 |
| top | average opponent: 1498record: 0-3 | new rating: 1394 | ||
| Grand Prix Manchester 2016 (SOI standard) | starting rating: 1446 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 22 | Mokasdar, Sushrut (1500) | Won 2-0 | +191465 |
| 2standard | 29 | Korevaar, Martijn (1542) | Lost 0-2 | -171448 |
| 3standard | 503 | Krejsa, Tomas (1683) | Lost 0-2 | -131435 |
| 4standard | 626 | Flint, Callum (1589) | Won 2-1 | +201455 |
| 5standard | 563 | White, Robert [ENG] (1507) | Won 2-0 | +191474 |
| 6standard | 320 | Shapiro, James (1559) | Won 2-0 | +201494 |
| 7standard | 275 | Scherpenzeel, Dennis (1721) | Lost 0-2 | -141480 |
| 8standard | 440 | Ballard, Dale (1517) | Lost 0-2 | -171463 |
| 9standard | 374 | Charles, Richard (1458) | Lost 0-2 | -191444 |
| top | average opponent: 1564record: 4-5 | new rating: 1444 | ||
| Grand Prix London 2015 (ORI standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 509 | Roadknight, Adam (1500) | Draw 1-1 | 01500 |
| 2standard | 824 | Brorsson, Harald (1500) | Lost 0-2 | -181482 |
| 3standard | 1012 | Smith, David [ENG] (1480) | Lost 1-2 | -181464 |
| 4standard | 1052 | Copeland, Jacob R (1463) | Lost 0-2 | -181446 |
| top | average opponent: 1486record: 0-3-1 | new rating: 1446 | ||