Roberts, Ian
Current rating: 1547
Record: 9-6-1
| Grand Prix Memphis 2019 (RNA standard) | starting rating: 1575 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 207 | Nix, Christopher (1500) | Lost 0-2 | -201555 |
| 2standard | 330 | Baleda, Carl (1482) | Lost 1-2 | -191536 |
| 3standard | 415 | Gay, Tyler (1441) | Lost 1-2 | -201516 |
| 4standard | 451 | Norris, Collin (1447) | Won 2-0 | +171533 |
| 5standard | 404 | Williams, Cody (1464) | Draw 1-1 | -11532 |
| 6standard | 339 | Wu, Yanfei (1532) | Lost 0-2 | -181514 |
| 7standard | 282 | Sanchez, Homero (1429) | Won 2-1 | +161530 |
| 8standard | 224 | Arbelo, Alexander (1448) | Won 2-0 | +171547 |
| average opponent: 1468record: 3-4-1 | new rating: 1547 | |||
| Grand Prix Birmingham 2004 (DST limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 33 | Chung, Wai-Sing (Jimmy) (1472) | Won 2-1 | +181518 |
| 2sealed | 28 | Ross, Edward (1708) | Lost 0-2 | -151503 |
| 3sealed | 186 | Ogburn, Kate (1446) | Won 2-0 | +171520 |
| 4sealed | 76 | Veeneman, Chris (1569) | Lost 1-2 | -171503 |
| 5sealed | 143 | Cutajar, Kurt (1498) | Won 2-0 | +181521 |
| 6sealed | 103 | Vaughan, Daniel (1520) | Won 2-1 | +181539 |
| 7sealed | 53 | Phillips, Paul A (1543) | Won 2-1 | +181557 |
| 8sealed | 45 | O'Keeffe, Simon P (1547) | Won 2-0 | +181575 |
| average opponent: 1538record: 6-2 | new rating: 1575 | |||