Seki, Hirotaka
Current rating: 1603
Record: 21-13-1
| Grand Prix Nagoya 2019 (ELD standard) | starting rating: 1623 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 51 | Higashide, Masato (1500) | Lost 0-2 | -201603 |
| top | record: 0-1 | new rating: 1603 | ||
| Grand Prix Shizuoka 2018 (standard) (GRN standard) | starting rating: 1629 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 657 | Honda, Masaki (1346) | Won 2-0 | +131642 |
| 2standard | 493 | Katakawa, Souta (1657) | Won 2-1 | +181660 |
| 3standard | 267 | Sun, Guolong (1702) | Lost 0-2 | -171643 |
| 4standard | 554 | Sakurai, Itu'Sei (1547) | Lost 1-2 | -201623 |
| top | average opponent: 1563record: 2-2 | new rating: 1623 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1643 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 686 | Mouri, Yusuke (1612) | Lost 0-2 | -191624 |
| 2sealed | 922 | Yoza, Shinichiro (1483) | Lost 1-2 | -201604 |
| 3sealed | 1047 | Koike, Junya (1446) | Won 2-0 | +151619 |
| 4sealed | 832 | Komuro, Kazutoshi (1486) | Won 2-0 | +151634 |
| 5sealed | 659 | Adachi, Ryosuke (1448) | Won 2-0 | +151649 |
| 6sealed | 497 | Watanabe, Shogo5163 (1509) | Lost 0-2 | -201629 |
| top | average opponent: 1497record: 3-3 | new rating: 1629 | ||
| Grand Prix Kyoto 2017 (HOU limited) | starting rating: 1634 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 93 | Uematsu, Ryou (1443) | Won 2-1 | +141648 |
| 2sealed | 435 | Rodriguez, Luis (1549) | Won 2-0 | +171665 |
| 3sealed | 399 | Ramboa, Thierry (1756) | Lost 0-2 | -171648 |
| 4sealed | 535 | Uchino, Jun (1601) | Lost 0-2 | -191629 |
| 5sealed | 724 | Uchida, Tomoya (1496) | Won 2-0 | +161645 |
| 6sealed | 722 | Sano, Kimiaki (1728) | Won 2-1 | +201665 |
| 7sealed | 440 | Jinno, Kaname (1462) | Lost 0-2 | -221643 |
| top | average opponent: 1577record: 4-3 | new rating: 1643 | ||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1665 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 239 | Shimoyama, Kazuma (1411) | Lost 0-2 | -221643 |
| 2standard | 662 | Toki, Kousuke (1488) | Won 2-0 | +151658 |
| 3standard | 1025 | Nakamoto, Kosuke (1660) | Lost 1-2 | -181640 |
| 4standard | 1149 | Utida, Yuki (1495) | Won 2-1 | +151655 |
| 5standard | 650 | Kimoto, Keiya (1471) | Lost 0-2 | -211634 |
| top | average opponent: 1505record: 2-3 | new rating: 1634 | ||
| Grand Prix Nagoya 2016 (OGW limited) | starting rating: 1515 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 455 | Yoshizumi, Tomohiro (1660) | Won 2-0 | +201535 |
| 2sealed | 93 | Atomi, Yuki (1507) | Draw 1-1 | 01535 |
| 3sealed | 595 | Nakagawa, Hirofumi (1448) | Won 2-1 | +161551 |
| 4sealed | 310 | Maruyama, Shouta (1588) | Won 2-0 | +191570 |
| 5sealed | 147 | Takiguchi, Yuta (1593) | Won 2-1 | +181588 |
| 6sealed | 73 | Minami, Masashi (1680) | Won 2-1 | +201608 |
| 7sealed | 38 | Hagiwara, Genta (1779) | Won 2-0 | +211629 |
| 8sealed | 21 | Tominaga, Yuya (1653) | Won 2-1 | +191648 |
| 9sealed | 11 | Nakano, Tatsuhito (1619) | Won 2-0 | +171665 |
| top | average opponent: 1614record: 8-0-1 | new rating: 1665 | ||
| Grand Prix Kobe 2015 (BFZ standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 53 | Miyazaki, Kazuyuki (1079) | Won 2-1 | +111511 |
| 2standard | 74 | Xie, Zhan (1716) | Won 2-0 | +211532 |
| 3standard | 357 | Mitsuyasu, Hidetoshi (1552) | Lost 1-2 | -171515 |
| top | average opponent: 1449record: 2-1 | new rating: 1515 | ||