Ito, Koichi
Current rating: 1328
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1393 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 454 | Naito, Yoshiyuki (1464) | Lost 0-2 | -171376 |
| 2sealed | 744 | Ido, Yoshito (1484) | Lost 0-2 | -161360 |
| 3sealed | 1058 | Shibasaki, Jun (1483) | Lost 0-2 | -151345 |
| 4sealed | 1027 | Masayuki, Nishida (1444) | Lost 0-2 | -171328 |
| top | average opponent: 1469record: 0-4 | new rating: 1328 | ||
| Grand Prix Kyoto 2017 (HOU limited) | starting rating: 1483 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 138 | Ookawa, Yuya (1492) | Lost 1-2 | -181465 |
| 2sealed | 645 | Uematsu, Ryou (1428) | Lost 0-2 | -191446 |
| 3sealed | 1026 | Iwasaki, Masayuki (1468) | Lost 0-2 | -171429 |
| 4sealed | 1092 | Ogura, Kentaro (1448) | Lost 0-2 | -181411 |
| 5sealed | 1084 | Miyazaki, Masato (1425) | Lost 0-2 | -181393 |
| top | average opponent: 1452record: 0-5 | new rating: 1393 | ||
| Grand Prix Sendai 2001 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 63 | Takeda, Hideo (1570) | Lost 0-2 | -171483 |
| 3extended | 101 | Yamagami, Isao (1498) | Won 2-1 | +191502 |
| 4extended | 104 | Hatakeyama, Tomoya (1397) | Lost 1-2 | -201482 |
| 5extended | 113 | Miura, Akiyoshi (1552) | Lost 1-2 | -171465 |
| 6extended | 150 | Sato, Akira (1483) | Lost 0-2 | -181447 |
| 7extended | 138 | Nakagawa, Koichi (1397) | Won 2-0 | +171464 |
| 8extended | 106 | Hatsuyama, Kenji (1481) | Won 2-0 | +191483 |
| top | average opponent: 1483record: 3-4 | new rating: 1483 | ||