Okubo, Hiroshi
Current rating: 1477
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1441 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 335 | Fujimoto, Takashi (1356) | Won 2-1 | +161457 |
| 2sealed | 134 | Sun, Guolong (1721) | Won 2-1 | +231480 |
| 3sealed | 475 | Hirosawa, Yuuta (1949) | Lost 1-2 | -101470 |
| 4sealed | 358 | Matsuo, Yoshiyuki (1620) | Won 2-1 | +211491 |
| 5sealed | 337 | Son, Kii (1660) | Lost 0-2 | -151476 |
| 6sealed | 599 | Kondo, Masahiro 8757 (1515) | Won 2-0 | +191495 |
| 7sealed | 406 | Konno, Tomoyuki (1511) | Lost 1-2 | -181477 |
| top | average opponent: 1619record: 4-3 | new rating: 1477 | ||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1459 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 220 | Hirouchi, Hideaki (1467) | Lost 0-2 | -181441 |
| top | record: 0-1 | new rating: 1441 | ||
| Grand Prix Kobe 2015 (BFZ standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 554 | Nakamura, Akira (1463) | Lost 1-2 | -191481 |
| 2standard | 650 | Fukui, Kentarou (1463) | Lost 1-2 | -181463 |
| 3standard | 1209 | Fujii, Ami (1333) | Won 2-1 | +161479 |
| 4standard | 1121 | Kaneko, Shun (1377) | Lost 1-2 | -201459 |
| top | average opponent: 1409record: 1-3 | new rating: 1459 | ||