Costales, Glenn S
Current rating: 1483
| Grand Prix Singapore 2009 (extended) | starting rating: 1481 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 89 | Neo, Tao You (1500) | Lost 1-2 | -181463 |
| 2extended | 116 | Goh, Kun Hao Sullivan (1482) | Lost 1-2 | -181445 |
| 3extended | 138 | Tan, Ian Keng Huat (1467) | Lost 0-1 | -171428 |
| 4extended | 176 | Moore, Rudy (1446) | Won 2-0 | +181446 |
| 5extended | 154 | Kang, Gabriel (1534) | Won 2-0 | +201466 |
| 6extended | 134 | Tayao, Konrad (1499) | Lost 1-2 | -181448 |
| 7extended | 127 | Yeow, Zhi Hui Christin (1465) | Won 2-1 | +181466 |
| 8extended | 100 | Neo, Daniel (1403) | Won 2-0 | +171483 |
| top | average opponent: 1475record: 4-4 | new rating: 1483 | ||
| Grand Prix Manila 2008 (Lorwyn block) | starting rating: 1478 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 191 | Fernandez, Eduardo V (1500) | Won 2-1 | +181496 |
| 2block | 109 | Cayanan, Melrick B (1518) | Lost 1-2 | -171479 |
| 3block | 193 | Mogul, Angelo Paulo (1500) | Lost 1-2 | -181461 |
| 4block | 209 | Amowas, Christopher (1482) | Won 2-0 | +181479 |
| 5block | 185 | Soliveres, Roel (1486) | Won 2-0 | +181497 |
| 6block | 89 | Manuel, Frederick (1518) | Lost 0-2 | -171480 |
| 7block | 199 | Tanedo, Boyd Vincent (1501) | Won 2-0 | +181498 |
| 8block | 99 | Regino, Jaime Lorenzo (1517) | Lost 0-2 | -171481 |
| top | average opponent: 1503record: 4-4 | new rating: 1481 | ||
| Grand Prix Singapore 2007 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 109 | Chang, Wai Hou (1500) | Lost 0-2 | -181482 |
| 3extended | 121 | Tan, Wee Meng (1410) | Won 2-0 | +171499 |
| 4extended | 118 | Sangpar, Prakit (1465) | Lost 0-2 | -191480 |
| 5extended | 139 | Chua, Rodger (1416) | Lost 0-2 | -191461 |
| 6extended | 142 | Lew, Wei Wei (1465) | Won 2-0 | +181479 |
| 7extended | 122 | Harith, Gibran (1438) | Lost 1-2 | -191460 |
| 8extended | 110 | Cho, Zheng Heng (1433) | Won 2-0 | +181478 |
| top | average opponent: 1447record: 3-4 | new rating: 1478 | ||