Sumita, Masanobu
Current rating: 1622
Record: 40-28-3
| Grand Prix Kobe 2009 (extended) | starting rating: 1601 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 55 | Sasaki, Kazuma (1500) | Lost 1-2 | -201581 |
| 2extended | 160 | Yokono, Yuusuke (1428) | Lost 1-2 | -211560 |
| 3extended | 217 | Kamizono, Naoki (1466) | Won 2-1 | +161576 |
| 4extended | 182 | Tukamoto, Takuya (1525) | Lost 0-2 | -191557 |
| 5extended | 223 | Horie, Takaaki (1467) | Won 2-1 | +171574 |
| 6extended | 167 | Takatsuki, Ryo (1412) | Won 2-1 | +151589 |
| 7extended | 50 | Sasaki, Yuusuke (Osaka) (1482) | Won 2-0 | +161605 |
| 8extended | 78 | Mizutani, Naoto (1547) | Won 2-0 | +171622 |
| top | average opponent: 1478record: 5-3 | new rating: 1622 | ||
| Grand Prix Okayama 2008 (ALA limited) | starting rating: 1617 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 255 | Tanaka, Ittoku (1487) | Lost 0-0 | -201597 |
| 2sealed | 235 | Adachi, Takeshi (1497) | Lost 1-2 | -201577 |
| 3sealed | 266 | Tsuboyama, Shuta (1471) | Lost 0-2 | -201557 |
| 4sealed | 276 | Curry, Neil (1444) | Won 2-1 | +161573 |
| 5sealed | 243 | Ishimaru, Ken (1597) | Won 2-0 | +191592 |
| 6sealed | 39 | Yamasaki, Ippei (1433) | Won 2-0 | +151607 |
| 7sealed | 150 | Kamei, Toru (1415) | Won 2-0 | +141621 |
| 8sealed | 125 | Ryo, Tomohiro (1485) | Lost 0-2 | -201601 |
| top | average opponent: 1479record: 4-4 | new rating: 1601 | ||
| Grand Prix Shizuoka 2003 (MRD limited) | starting rating: 1605 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 8 | Katuki, Yuuichirou (1485) | Lost 0-2 | -201585 |
| 3sealed | 153 | Goto, Seiji (1343) | Won 2-0 | +131598 |
| 4sealed | 155 | Masumura, Fumiaki (1514) | Won 2-0 | +171615 |
| 5sealed | 52 | Abueg, John (1517) | Won 2-1 | +161631 |
| 6sealed | 45 | Goto, Kiyoaki (1592) | Lost 0-2 | -191612 |
| 7sealed | 80 | Morita, Masahiko (1983) | Lost 0-2 | -111601 |
| 8sealed | 85 | Nagata, Shigeki (1522) | Won 2-0 | +161617 |
| top | average opponent: 1565record: 4-3 | new rating: 1617 | ||
| Grand Prix Yokohama 2003 (Onslaught block) | starting rating: 1625 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 32 | Yasunaka, Ryouhei (1500) | Lost 1-2 | -201605 |
| 2block | 276 | Kobayashi, Akihito (1392) | Won 2-0 | +141619 |
| 3block | 254 | Sagawa, Yuuki (1482) | Lost 0-2 | -201599 |
| 4block | 272 | Nikkuni, Fumihito (1505) | Lost 0-2 | -201579 |
| 5block | 341 | Nakagawa, Tsukasa (1356) | Lost 1-2 | -221557 |
| 6block | 329 | Raymond, Paul-emile (1445) | Won 2-1 | +161573 |
| 7block | 264 | Takahashi, Naoyuki (1465) | Won 2-0 | +161589 |
| 8block | 220 | Kishida, Hirokazu (1459) | Won 2-1 | +161605 |
| top | average opponent: 1451record: 4-4 | new rating: 1605 | ||
| Grand Prix Fukuoka 2002 (TOR limited) | starting rating: 1614 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 18 | Kubouchi, Naoki (1606) | Lost 0-2 | -181596 |
| 4sealed | 97 | Nose, Koji (1471) | Lost 1-2 | -201576 |
| 5sealed | 115 | Hashimoto, Soichiro (1450) | Won 2-1 | +151591 |
| 6sealed | 103 | Sakamoto, Kazuya (1523) | Won 2-1 | +171608 |
| 7sealed | 58 | Wakisaka, Yuusuke (1576) | Won 2-0 | +171625 |
| top | average opponent: 1525record: 3-2 | new rating: 1625 | ||
| Grand Prix Shizuoka 2001 (ODY limited) | starting rating: 1638 | |||
| round | table | opponent (rating) | result | Δrating |
| 4sealed | 17 | Yamazaki, Hiroki (1601) | Lost 0-2 | -191619 |
| 5sealed | 86 | Hina, Kazuhiro (1518) | Won 2-0 | +171636 |
| 6sealed | 39 | Watanabe, Hiroto (1586) | Lost 0-2 | -191617 |
| 7sealed | 104 | Shibuya, Yuuto (1542) | Lost 0-2 | -201597 |
| 8sealed | 103 | Takeuchi, Megumi (1519) | Won 2-0 | +171614 |
| top | average opponent: 1553record: 2-3 | new rating: 1614 | ||
| Grand Prix Kobe 2001 (Invasion block) | starting rating: 1580 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 436 | Murakami, Takanori (1500) | Won 2-1 | +161596 |
| 2block | 301 | Nakajima, Mikihito (1500) | Draw 1-1 | -21594 |
| 3block | 237 | Tanaka, Jun'ichi (1516) | Won 2-1 | +171611 |
| 4block | 149 | Sakai, Kentaro (1518) | Lost 0-2 | -201591 |
| 5block | 291 | Endo, Go (1517) | Won 2-0 | +171608 |
| 6block | 185 | Kato, Ryuji (1535) | Won 2-0 | +171625 |
| 7block | 107 | Hirabayashi, Tatsurou (1499) | Won 2-1 | +151640 |
| 8block | 66 | Kubouchi, Naoki (1594) | Won 2-0 | +171657 |
| 9block | 37 | Kochi, Takashi (1589) | Lost 0-2 | -191638 |
| top | average opponent: 1530record: 6-2-1 | new rating: 1638 | ||
| Grand Prix Hiroshima 2001 (INV limited) | starting rating: 1530 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 23 | Nomura, Eiji (1477) | Lost 0-2 | -191511 |
| 2sealed | 151 | Shimizu, Akihiro (1482) | Won 2-0 | +181529 |
| 3sealed | 131 | Amano, Hideaki (1452) | Lost 0-2 | -201509 |
| 4sealed | 166 | Mukuno, Yuuji (1451) | Won 2-1 | +171526 |
| 5sealed | 91 | Nakamura, Fumihiko (1500) | Won 2-0 | +181544 |
| 6sealed | 73 | Adachi, Shingo (1552) | Won 2-0 | +181562 |
| 7sealed | 34 | Neki, Haruyuki (1544) | Won 2-0 | +181580 |
| top | average opponent: 1494record: 5-2 | new rating: 1580 | ||
| Grand Prix Kyoto 2000 (extended) | starting rating: 1532 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 171 | Akemitsu, Hiroaki (1518) | Won 2-1 | +171549 |
| 3extended | 30 | Nishio, Yoshiaki (1518) | Lost 0-2 | -181531 |
| 4extended | 181 | Sumi, Kazuhiko (1510) | Lost 1-2 | -191512 |
| 5extended | 198 | Shiota, Yasuo (1500) | Won 2-0 | +181530 |
| 6extended | 169 | Kawai, Kazunori (1517) | Lost 1-2 | -181512 |
| 7extended | 170 | Shimura, Yasuhiko (1500) | Won 2-1 | +181530 |
| 8extended | 103 | Biwaki, Toshiaki (1548) | Draw 1-1 | 01530 |
| top | average opponent: 1516record: 3-3-1 | new rating: 1530 | ||
| Grand Prix Sapporo 2000 (PCY limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 44 | Koyama, Shohei (1500) | Draw 1-1 | 01500 |
| 2sealed | 57 | Iwata, Masanori (1500) | Won 2-0 | +181518 |
| 3sealed | 57 | Nomura, Masaki (1518) | Won 2-0 | +181536 |
| 4sealed | 34 | Kon, Yuichi (1499) | Won 2-1 | +171553 |
| 5sealed | 14 | Watanabe, Hiroshi (1450) | Lost 0-2 | -201533 |
| 6sealed | 38 | Terashima, Shinichiro (1535) | Won 2-0 | +181551 |
| 7sealed | 22 | Wada, Naoya (1451) | Lost 0-1 | -191532 |
| top | average opponent: 1493record: 4-2-1 | new rating: 1532 | ||