McCallum, Gregory
Current rating: 1503
| Grand Prix Bangkok 2013 (DGM limited) | starting rating: 1521 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 24 | Wongtawon, Suracheat (1485) | Won 2-0 | +171538 |
| 2sealed | 89 | Nakano, Fumiki (1728) | Won 2-0 | +211559 |
| 3sealed | 94 | Lai, Kwong Pang (1487) | Lost 0-2 | -191540 |
| 4sealed | 190 | Kovitkanit, Pichai (1519) | Lost 0-2 | -181522 |
| 5sealed | 292 | Thongsook, Woragon (1499) | Lost 0-2 | -191503 |
| top | average opponent: 1543record: 2-3 | new rating: 1503 | ||
| Grand Prix Bangkok 2007 (LRW limited) | starting rating: 1483 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 11 | Satavon, Jirawat (1500) | Lost 0-2 | -181465 |
| 2sealed | 76 | Tey, Vincent (1482) | Won 2-0 | +191484 |
| 3sealed | 91 | Panitvong, Win (1520) | Lost 1-2 | -181466 |
| 4sealed | 117 | Chongwattanakit, Apich (1482) | Won 2-1 | +191485 |
| 5sealed | 95 | Gan, Victor (1501) | Won 2-0 | +181503 |
| 6sealed | 62 | Thampitee, Kitikun (1470) | Won 2-1 | +171520 |
| 7sealed | 42 | Boonyapongnugoon, Suradate (1543) | Won 2-1 | +191539 |
| 8sealed | 54 | Sirilertvorakul, Veerapat (1537) | Lost 0-2 | -181521 |
| top | average opponent: 1504record: 5-3 | new rating: 1521 | ||
| Grand Prix Hiroshima 2001 (INV limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 26 | Ukai, Ryosuke (1518) | Lost 0-2 | -181482 |
| 3sealed | 143 | Hoshina, Wataru (1499) | Won 2-1 | +191501 |
| 4sealed | 89 | Yamaguchi, Katsuhiro (1521) | Lost 0-2 | -181483 |
| top | average opponent: 1512record: 1-2 | new rating: 1483 | ||