Sekine, Takeshi
Current rating: 1558
Record: 25-19
| Grand Prix Shizuoka 2008 (MOR standard) | starting rating: 1616 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 112 | Iwasaki, Yuusuke (1762) | Lost 1-2 | -151601 |
| 4standard | 149 | Michibata, Tatsuya (1513) | Lost 1-2 | -201581 |
| 5standard | 209 | Minami, Tsukasa (1504) | Won 2-1 | +171598 |
| 6standard | 202 | Shiraishi, Tomomi (1489) | Lost 1-2 | -201578 |
| 7standard | 102 | Miyauchi, Makoto (1514) | Lost 0-2 | -191559 |
| 8standard | 115 | Chijimi, Keiichi (1651) | Won 2-0 | +191578 |
| 9standard | 176 | Onoda, Hikaru (1459) | Lost 1-2 | -201558 |
| top | average opponent: 1556record: 2-5 | new rating: 1558 | ||
| Grand Prix Yokohama 2004 (COK limited) | starting rating: 1604 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 108 | Koen, Yusuke (1489) | Lost 1-2 | -201584 |
| 2sealed | 208 | Matsumoto, Hirotoshi (1469) | Won 2-0 | +161600 |
| 3sealed | 239 | Ishikawa, Masayo (1527) | Won 2-1 | +161616 |
| top | average opponent: 1495record: 2-1 | new rating: 1616 | ||
| Grand Prix Yokohama 2003 (Onslaught block) | starting rating: 1664 | |||
| round | table | opponent (rating) | result | Δrating |
| 4block | 12 | Ooura, Shotaro (1578) | Lost 0-2 | -201644 |
| 5block | 112 | Imai, Kimio (1569) | Won 2-1 | +171661 |
| 6block | 27 | Murase, Hiroshi (1515) | Lost 0-2 | -211640 |
| 7block | 106 | Komiya, Tadayoshi (1708) | Lost 1-2 | -161624 |
| 8block | 147 | Takaishi, Yuuri (1517) | Lost 0-2 | -201604 |
| top | average opponent: 1577record: 1-4 | new rating: 1604 | ||
| Grand Prix Kyoto 2003 (LGN limited) | starting rating: 1647 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 244 | Takeuchi, Kazuhiro (1500) | Won 2-0 | +151662 |
| 2sealed | 166 | Aoki, Yousaku (1524) | Lost 1-2 | -211641 |
| 3sealed | 233 | Fukuta, Shingo (1500) | Won 2-1 | +161657 |
| 4sealed | 148 | Doi, Koji (1548) | Won 2-0 | +161673 |
| 5sealed | 113 | Sakamoto, Masaaki (1545) | Lost 1-2 | -201653 |
| 6sealed | 107 | Sakurada, Kouichi (1605) | Lost 0-2 | -191634 |
| 7sealed | 142 | Kawabata, Tomoyuki (1482) | Won 2-0 | +151649 |
| 8sealed | 79 | Tanaka, Noboru (1483) | Won 2-0 | +151664 |
| top | average opponent: 1523record: 5-3 | new rating: 1664 | ||
| Grand Prix Shizuoka 2001 (ODY limited) | starting rating: 1592 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 89 | Satou, Eisuke (1500) | Won 2-0 | +161608 |
| 2sealed | 109 | Motomura, Shigeru (1518) | Won 2-0 | +161624 |
| 3sealed | 44 | Kawaguchi, Nobufumi (1536) | Won 2-0 | +171641 |
| 4sealed | 23 | Kanda, Satoshi (1537) | Won 2-0 | +161657 |
| 5sealed | 2 | Suzuki, Kei (1641) | Lost 1-2 | -181639 |
| 6sealed | 31 | Yasooka, Shota (1512) | Won 2-1 | +151654 |
| 7sealed | 31 | Katayama, Tomoyuki (1588) | Won 2-1 | +171671 |
| 8sealed | 6 | Ikeda, Tsuyoshi (1584) | Won 2-0 | +171688 |
| 9rochester | 11 | Kato, Eiho (1575) | Lost 1-2 | -201668 |
| 10rochester | 17 | Nagaoka, Takayuki (1714) | Lost 0-2 | -181650 |
| 11rochester | 23 | Mitsui, Tokiko (1590) | Won 2-0 | +171667 |
| 12rochester | 16 | Ito, Ken (1595) | Lost 1-2 | -191648 |
| 13rochester | 24 | Kurasawa, Kanto (1666) | Lost 1-2 | -181630 |
| 14rochester | 26 | Honma, Satoshi (1534) | Won 2-0 | +171647 |
| top | average opponent: 1578record: 9-5 | new rating: 1647 | ||
| Grand Prix Kobe 2001 (Invasion block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 3block | 27 | Eto, Shinichiro (1537) | Won 2-0 | +191519 |
| 4block | 5 | Ishida, Atsushi (1504) | Won 2-1 | +171536 |
| 5block | 44 | Sato, Kimihiko (1555) | Won 2-1 | +191555 |
| 6block | 20 | Saito, Kazuto (1604) | Won 2-0 | +191574 |
| 7block | 2 | Cho, Shinichiro (1607) | Won 2-0 | +181592 |
| 8block | 6 | Yuasa, Kentarou (1594) | Won 2-0 | +181610 |
| 9block | 2 | Nagaoka, Takayuki (1582) | Lost 1-2 | -181592 |
| top | average opponent: 1569record: 6-1 | new rating: 1592 | ||