Sakai, Tatsuhiro
Current rating: 1526
Record: 10-10
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1467 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 100 | Miyahara, Shun (1522) | Won 2-1 | +191486 |
| 2sealed | 449 | Kitamura, Ryo (1593) | Lost 1-2 | -161470 |
| 3sealed | 666 | Endo, Tatsuya (1500) | Won 2-1 | +181488 |
| 4sealed | 361 | Watanabe, Yuta 8061 (1559) | Won 2-0 | +201508 |
| 5sealed | 511 | Kabashima, Takuya (1630) | Won 2-1 | +201528 |
| 6sealed | 101 | Horie, Tooru (1758) | Won 2-0 | +221550 |
| 7sealed | 139 | Iso, Toshiharu (1571) | Lost 1-2 | -181532 |
| 8sealed | 214 | Ouchi, Genki (1568) | Won 2-1 | +191551 |
| 9sealed | 91 | Matsubara, Tohru (1787) | Lost 1-2 | -141537 |
| 10draft | 133 | Furusawa, Shu (1877) | Lost 0-2 | -121525 |
| 11draft | 162 | Fujiwara, Naomichi (1538) | Won 2-0 | +191544 |
| 12draft | 96 | Kimura, Tatsuki (1537) | Lost 0-2 | -191525 |
| 13draft | 202 | Yakushi, Hideki (1568) | Won 2-0 | +191544 |
| 14draft | 184 | Nakayama, Masaki (1549) | Lost 0-2 | -181526 |
| average opponent: 1611record: 8-6 | new rating: 1526 | |||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 98 | Okamoto, Jin (1670) | Lost 1-2 | -151485 |
| 2sealed | 696 | Teshima, Hisanori (1542) | Won 2-1 | +191504 |
| 3sealed | 557 | Nakayama, Satoshi (1484) | Lost 0-2 | -181486 |
| 4sealed | 855 | Inoue, Masashi (1501) | Won 2-0 | +181504 |
| 5sealed | 883 | Sakai, Shigeto (1423) | Lost 0-2 | -191485 |
| 6sealed | 827 | Makino, Yuuhei (1509) | Lost 0-2 | -181467 |
| average opponent: 1521record: 2-4 | new rating: 1467 | |||