Seki, Tosio
Current rating: 1530
Record: 20-19
| Grand Prix Nagoya 2019 (ELD standard) | starting rating: 1573 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 66 | Udagawa, Yuuya (1468) | Lost 0-2 | -201553 |
| 2standard | 544 | Mizuno, Takeshi (1437) | Won 2-0 | +161569 |
| 3standard | 648 | Satou, Yuji (1462) | Lost 1-2 | -201549 |
| 4standard | 761 | Hino, Shingo (1483) | Lost 1-2 | -191530 |
| top | average opponent: 1462record: 1-3 | new rating: 1530 | ||
| Grand Prix Kyoto 2019 (RNA standard) | starting rating: 1592 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 528 | Obara, Hiroki (1500) | Lost 0-2 | -191573 |
| top | record: 0-1 | new rating: 1573 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1652 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 606 | Sekiya, Hiroshi (1457) | Lost 1-2 | -221630 |
| 2sealed | 858 | Izumi, Hikaru (1701) | Lost 0-2 | -161614 |
| 3sealed | 1106 | Ito, Kenta (1436) | Lost 1-2 | -221592 |
| top | average opponent: 1532record: 0-3 | new rating: 1592 | ||
| Grand Prix Kyoto 2017 (HOU limited) | starting rating: 1673 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 606 | Kelsey, Garrett (1480) | Lost 0-2 | -211652 |
| top | record: 0-1 | new rating: 1652 | ||
| Grand Prix Kobe 2017 (modern) | starting rating: 1502 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 743 | Shang, Shuwen (1417) | Won 2-0 | +171519 |
| 2modern | 39 | Nitta, Toshiya (1471) | Lost 0-2 | -191500 |
| 3modern | 786 | Melanson, Chris (1456) | Won 2-1 | +171517 |
| 4modern | 665 | Takenaka, Susumu (1396) | Won 2-1 | +161533 |
| 5modern | 208 | Yoshimura, Asuka (1527) | Won 2-1 | +181551 |
| 6modern | 105 | Nishizawa, Taichi (1672) | Lost 1-2 | -161535 |
| 7modern | 471 | Nemoto, Daisuke (1579) | Won 2-0 | +191554 |
| 8modern | 374 | Furusawa, Shu (1565) | Lost 0-2 | -181536 |
| 9modern | 443 | Miyabe, Kouichi (1672) | Won 2-1 | +201556 |
| 10modern | 297 | Chow, Boon Hung (1630) | Won 2-0 | +201576 |
| 11modern | 240 | Morinaka, Fuyuki (1553) | Won 2-0 | +171593 |
| 12modern | 79 | Lagasca, Rafael (1722) | Won 2-0 | +211614 |
| 13modern | 73 | Sakurai, Hiromi (1604) | Won 2-0 | +181632 |
| 14modern | 30 | Ootani, Nobuhiro (1744) | Won 2-1 | +201652 |
| 15modern | 54 | Oomori, Yasutomo (1859) | Won 2-0 | +211673 |
| top | average opponent: 1591record: 12-3 | new rating: 1673 | ||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1445 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 322 | Yamaguchi, Tetsuya (1595) | Won 2-1 | +201465 |
| 2standard | 60 | Kihara, Ryou (1744) | Lost 0-2 | -131452 |
| 3standard | 1057 | Gotoh, Takumi (1500) | Won 2-0 | +191471 |
| 4standard | 540 | Tabata, Yuusuke (1534) | Won 2-0 | +191490 |
| 5standard | 538 | Futagawa, Shinichi (1533) | Lost 1-2 | -171473 |
| 6standard | 487 | Makino, Yuuhei (1469) | Lost 0-2 | -181455 |
| 7standard | 749 | Yokoyama, Takaya (1494) | Won 2-0 | +191474 |
| 8standard | 757 | Kotouge, Tatsuya (1717) | Won 2-1 | +221496 |
| 9standard | 529 | Takeda, Hiroki (1738) | Won 2-1 | +221518 |
| 10standard | 194 | Saeki, Tadatoshi (1623) | Lost 0-2 | -161502 |
| top | average opponent: 1595record: 6-4 | new rating: 1502 | ||
| Grand Prix Kobe 2015 (BFZ standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 45 | Ito, Takuto (1429) | Lost 0-2 | -191481 |
| 2standard | 610 | Tomioka, Yoshihiro (1444) | Lost 1-2 | -191462 |
| 3standard | 1147 | Kunihiro, Mizuho (1479) | Won 2-1 | +181480 |
| 4standard | 1120 | Nakai, Shota (1497) | Lost 1-2 | -171463 |
| 5standard | 1036 | Hiraoka, Yuto (1462) | Lost 1-2 | -181445 |
| top | average opponent: 1462record: 1-4 | new rating: 1445 | ||