Jackaman, Joshua
Current rating: 1508
Record: 6-5-4
| Grand Prix Birmingham 2018 (std) (DOM standard) | starting rating: 1550 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 256 | Fisher, Luis (1500) | Won 2-0 | +171567 |
| 2standard | 146 | Melin, Pierre (1677) | Lost 0-2 | -161551 |
| 3standard | 467 | Poxon, Tyler (1511) | Won 2-1 | +171568 |
| 4standard | 224 | Peng, Zer Shiuan (1471) | Lost 0-2 | -201548 |
| 5standard | 421 | Harbich, Nils (1453) | Lost 0-2 | -191529 |
| 6standard | 411 | Fradejas, Diego (1400) | Lost 0-2 | -211508 |
| average opponent: 1502record: 2-4 | new rating: 1508 | |||
| Grand Prix London 2015 (ORI standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 97 | Doe, Rhys-Tomas (1500) | Draw 1-1 | 01500 |
| 2standard | 257 | Lugasi, Piergiorgio (1403) | Draw 1-1 | -21498 |
| 3standard | 459 | Brilling, Friedrich (1481) | Won 2-0 | +181516 |
| 4standard | 341 | Hammarlund Corselli, Michael (1547) | Won 2-1 | +181534 |
| 5standard | 225 | van der Linden, Bob (1581) | Won 2-1 | +191553 |
| 6standard | 140 | Vousden, Jamie (1537) | Lost 1-2 | -181535 |
| 7standard | 229 | Ray, Stephane (1530) | Draw 1-1 | 01535 |
| 8standard | 214 | Amaral da Cruz, Duarte (1380) | Draw 1-1 | -31532 |
| 9standard | 170 | Gray, Jordan (1521) | Won 2-1 | +181550 |
| average opponent: 1498record: 4-1-4 | new rating: 1550 | |||