Ohkuma, Atushi
Current rating: 1474
| Grand Prix Kyoto 2019 (RNA standard) | starting rating: 1550 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 55 | Kanbara, Hokuto (1493) | Lost 1-2 | -191531 |
| 2standard | 533 | Shimokawa, Kenzo (1481) | Lost 0-2 | -191512 |
| 3standard | 891 | Fujita, Toshitake (1526) | Won 2-1 | +181530 |
| 4standard | 919 | Kondo, Hiromi (1484) | Lost 1-2 | -191511 |
| 5standard | 894 | Iwata, Noriaki (1466) | Lost 0-2 | -181493 |
| 6standard | 768 | Ito, Takahiro (1450) | Lost 0-2 | -191474 |
| top | average opponent: 1483record: 1-5 | new rating: 1474 | ||
| Grand Prix Shizuoka 2018 (standard) (GRN standard) | starting rating: 1511 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 435 | Tsutiya, Yukihiro (1451) | Won 2-0 | +171528 |
| 2standard | 521 | Umi, Hirokazu (1643) | Won 2-1 | +201548 |
| 3standard | 577 | Suzuki, Syota (1520) | Won 2-1 | +181566 |
| 4standard | 364 | Tanaka, Shun (1515) | Lost 1-2 | -191547 |
| 5standard | 400 | Sakai, Tatsuya (1663) | Won 2-1 | +201567 |
| 6standard | 391 | Konishi, Akio (1563) | Lost 1-2 | -181549 |
| 7standard | 512 | Watanabe, Kyohei (1667) | Lost 1-2 | -161533 |
| 8standard | 563 | Tsuda, Kouki (1481) | Won 2-1 | +171550 |
| top | average opponent: 1563record: 5-3 | new rating: 1550 | ||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 199 | Sugasawa, Tomoyuki (1450) | Won 2-1 | +171517 |
| 2standard | 24 | Endo, Koki (1517) | Won 2-1 | +181535 |
| 3standard | 374 | Igawa, Yuuto (1535) | Lost 1-2 | -181517 |
| 4standard | 880 | Ishii, Kouta (1501) | Lost 0-2 | -181499 |
| 5standard | 1048 | Maeda, Hinata (1499) | Lost 1-2 | -181481 |
| 6standard | 1057 | Horibe, Satoshi (1452) | Won 2-1 | +171498 |
| 7standard | 674 | Nobe, Hiroyuki (1355) | Lost 1-2 | -201478 |
| 8standard | 847 | Taniguchi, Yu (1388) | Won 2-0 | +161494 |
| 9standard | 673 | Tanaka, Kazuhiko (1440) | Won 2-1 | +171511 |
| top | average opponent: 1460record: 5-4 | new rating: 1511 | ||