Sakai, Souichirou
Current rating: 1511
| Grand Prix Shizuoka 2015 (KTK limited) | starting rating: 1544 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 145 | Wang, Chih Ming (1632) | Lost 0-2 | -161528 |
| 4sealed | 202 | Sugimoto, Yuuki (1556) | Lost 0-2 | -181510 |
| 5sealed | 271 | Onoda, Kenji (1548) | Won 2-1 | +191529 |
| 6sealed | 209 | Oosaki, Masakazu (1541) | Lost 0-2 | -181511 |
| top | average opponent: 1569record: 1-3 | new rating: 1511 | ||
| Grand Prix Kobe 2014 (modern) | starting rating: 1480 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 189 | Tsujii, Akiyoshi (1500) | Won 2-1 | +191499 |
| 2modern | 232 | Tatara, Yuichi (1518) | Won 2-0 | +181517 |
| 3modern | 81 | Sakurai, Koki (1522) | Won 2-1 | +181535 |
| 4modern | 29 | Ujihara, Atsushi (1553) | Won 2-0 | +191554 |
| 5modern | 45 | Kimura, Daisuke (1462) | Won 2-1 | +161570 |
| 6modern | 52 | Shiba, Yunosuke (1621) | Won 2-1 | +191589 |
| 7modern | 59 | Kiyonaga, Sho (1678) | Won 2-1 | +191608 |
| 8modern | 53 | Mitsui, Hideo (1599) | Lost 0-2 | -181590 |
| 9modern | 56 | Ishiguro, Youhei (1694) | Lost 0-2 | -161574 |
| 10modern | 75 | Shiota, Fumihiko (1762) | Lost 1-2 | -151559 |
| 11modern | 112 | Tomikawa, Akihisa (1628) | Won 2-1 | +201579 |
| 12modern | 88 | Hirata, Minoru (1718) | Lost 1-2 | -161563 |
| 13modern | 87 | Takao, Akinao (1609) | Lost 1-2 | -171546 |
| 14modern | 103 | Yamano, Tatsuto (1321) | Lost 0-2 | -221524 |
| 15modern | 98 | Ichikawa, Takayoshi (1633) | Won 2-1 | +201544 |
| top | average opponent: 1588record: 9-6 | new rating: 1544 | ||
| Grand Prix Kitakyushu 2013 (M14 standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 48 | Mizutani, Yoshinobu (1485) | Won 2-1 | +181518 |
| 2standard | 1 | Nakayama, Takahito (1518) | Won 2-0 | +181536 |
| 3standard | 184 | Okami, Motoyosi (1500) | Lost 1-2 | -191517 |
| 4standard | 277 | Shinoda, Akito (1493) | Lost 1-2 | -181499 |
| 5standard | 431 | Choi, Seung-Muk (1483) | Lost 1-2 | -191480 |
| top | average opponent: 1496record: 2-3 | new rating: 1480 | ||