Okubo, Shigetaka
Current rating: 1429
Record: 5-9-2
| Grand Prix Shizuoka 2018 (legacy) (legacy) | starting rating: 1444 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 420 | Marui, Yuki (1563) | Lost 0-2 | -161428 |
| 2legacy | 456 | Inoue, Akira (1482) | Lost 0-2 | -171411 |
| 3legacy | 606 | Furukawa, Yuki (1364) | Won 2-1 | +171428 |
| 4legacy | 586 | Donaldson, Charlie (1524) | Lost 1-2 | -161412 |
| 5legacy | 598 | Inagaki, Yukihiro (1459) | Draw 1-1 | +11413 |
| 6legacy | 540 | Ido, Daiki (1429) | Lost 0-2 | -181395 |
| 7legacy | 498 | Ogino, Genki (1345) | Won 2-1 | +171412 |
| 8legacy | 416 | Ito, Kensuke (1334) | Won 2-1 | +171429 |
| average opponent: 1437record: 3-4-1 | new rating: 1429 | |||
| Grand Prix Kobe 2014 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 165 | Lin, Hsiang Chuan (1500) | Lost 0-2 | -181482 |
| 2modern | 473 | Matsushige, Masataka (1519) | Lost 0-2 | -171465 |
| 3modern | 515 | Kitaoka, Takaaki (1440) | Won 2-1 | +171482 |
| 4modern | 501 | Iwaide, Yoshitaka (1433) | Lost 0-2 | -191463 |
| 5modern | 470 | Mochizuki, Kazuhiro (1420) | Won 2-0 | +181481 |
| 6modern | 386 | Obata, Maiko (1450) | Lost 0-2 | -191462 |
| 7modern | 390 | Furumori, Shota (1462) | Draw 1-1 | 01462 |
| 8modern | 318 | Itou, Takahiro (1455) | Lost 0-2 | -181444 |
| average opponent: 1460record: 2-5-1 | new rating: 1444 | |||