Koike, Isao
Current rating: 1478
Record: 3-4
| Grand Prix Chiba 2016 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 726 | Iwasaki, Sanshirou (1500) | Lost 1-2 | -181482 |
| 2legacy | 546 | Yazaki, Hirotaka (1448) | Won 2-1 | +171499 |
| 3legacy | 621 | Kawano, Takahiro (1342) | Lost 1-2 | -201479 |
| 4legacy | 951 | Takei, Jun (1455) | Lost 1-2 | -191460 |
| 5legacy | 1019 | Ohshiba, Atsushi (1381) | Won 2-1 | +171477 |
| 6legacy | 830 | Ogyu, Yoshiyuki (1394) | Won 2-1 | +161493 |
| 7legacy | 747 | Murakami, Kazuya3837 (1636) | Lost 1-2 | -151478 |
| average opponent: 1451record: 3-4 | new rating: 1478 | |||