Yamaguchi, Tatsuhiko
Current rating: 1481
Record: 6-7
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1496 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 139 | Kurihara, Shota (1449) | Won 2-0 | +171513 |
| 2sealed | 69 | Nakamura, Junya (1692) | Lost 0-2 | -151498 |
| 3sealed | 790 | Asai, Shin (1457) | Won 2-0 | +171515 |
| 4sealed | 694 | Shirato, Yutaro (1448) | Lost 1-2 | -191496 |
| 5sealed | 590 | Itou, Kouei (1667) | Lost 0-2 | -151481 |
| average opponent: 1543record: 2-3 | new rating: 1481 | |||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 561 | Wu, Songwei (1770) | Lost 1-2 | -131487 |
| 2sealed | 801 | Jinno, Kaname (1410) | Lost 0-2 | -201467 |
| 3sealed | 1150 | Kaihara, Shunsuke (1493) | Won 2-1 | +191486 |
| 4sealed | 842 | Tanaka, Yoshiyuki 3722 (1487) | Won 2-1 | +181504 |
| 5sealed | 580 | Takeyama, Maya (1396) | Lost 1-2 | -201484 |
| 6sealed | 774 | Ishijima, Kazuya (1410) | Lost 0-2 | -191465 |
| 7sealed | 558 | Morishita, Yoshihisa (1377) | Won 2-1 | +161481 |
| 8sealed | 579 | Toyohara, Eisuke (1304) | Won 2-1 | +151496 |
| average opponent: 1456record: 4-4 | new rating: 1496 | |||