Howes, Callum
Current rating: 1498
Record: 13-15-1
| Regional Championships Sydney 2023 (pioneer) | starting rating: 1506 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 2 | Lucero, Rovilleson (1524) | Lost 1-2 | -171489 |
| 2pioneer | 86 | Bracken, Max (1482) | Won 2-1 | +181507 |
| 3pioneer | 35 | Hughes, Sam (1503) | Lost 0-2 | -181489 |
| 4pioneer | 63 | Lewis-Jonns, Ryan (1691) | Lost 1-2 | -151474 |
| 5pioneer | 65 | Bird, Ethan (1525) | Won 2-0 | +191493 |
| 6pioneer | 46 | Velvin, Richard (1523) | Lost 1-2 | -171476 |
| 7pioneer | 57 | Davey, Ryan (1663) | Draw 0-0 | +31479 |
| 8pioneer | 49 | Gu, Jonny (1512) | Won 2-0 | +191498 |
| top | average opponent: 1553record: 3-4-1 | new rating: 1498 | ||
| Regional Championships Sydney 2022 (pioneer) | starting rating: 1418 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 52 | Hadow, Liam (1500) | Won 2-0 | +191437 |
| 2pioneer | 1 | Clifford, Kyle (1520) | Won 2-1 | +201457 |
| 3pioneer | 10 | Brunton, David (1551) | Won 2-1 | +191476 |
| 4pioneer | 8 | Adams, James [AUS] (1555) | Won 2-0 | +201496 |
| 5pioneer | 2 | Hitchcock, Steven (1552) | Lost 1-2 | -171479 |
| 6pioneer | 5 | Gittins, Calum (1779) | Lost 1-2 | -131466 |
| 7pioneer | 17 | Linabury, Simon (1551) | Won 2-0 | +201486 |
| 8pioneer | 11 | Jones, Riley (1634) | Won 2-0 | +201506 |
| top | average opponent: 1580record: 6-2 | new rating: 1506 | ||
| Grand Prix Melbourne 2018 (GRN limited) | starting rating: 1448 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 248 | Moore, James [AUS] (1500) | Won 2-1 | +191467 |
| 2sealed | 165 | Heng, Jee Siang (1499) | Lost 1-2 | -171450 |
| 3sealed | 308 | Kee, Benjamin (1586) | Lost 1-2 | -161434 |
| 4sealed | 293 | Ferdinands, Chris (1510) | Lost 0-2 | -161418 |
| top | average opponent: 1524record: 1-3 | new rating: 1418 | ||
| Grand Prix Melbourne 2016 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 173 | De Kock, Jonathan (1454) | Lost 0-2 | -191481 |
| 2modern | 320 | Zin, Aung (1482) | Won 2-1 | +181499 |
| 3modern | 258 | Parsons, David (1480) | Lost 1-2 | -181481 |
| 4modern | 405 | Harper, Justin 7150 (1485) | Won 2-0 | +181499 |
| 5modern | 373 | O'Brien, Maxwell (1438) | Lost 1-2 | -191480 |
| 6modern | 399 | Hardy, Chris (1482) | Lost 1-2 | -181462 |
| 7modern | 404 | Wang, Zhuoyang (1594) | Lost 0-2 | -161446 |
| 8modern | 350 | Burge, Tylar (1448) | Won 2-0 | +181464 |
| 9modern | 286 | Wang, Tao-Yi (1580) | Lost 1-2 | -161448 |
| top | average opponent: 1494record: 3-6 | new rating: 1448 | ||