Matsuo, Keita
Current rating: 1512
Record: 34-40-1
| Grand Prix Yokohama 2013 (GTC limited) | starting rating: 1324 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 1006 | Katsumata, Kosuke (1500) | Won 2-0 | +211345 |
| 2sealed | 740 | Nakamura, Yuichiro (1520) | Won 2-0 | +211366 |
| 3sealed | 677 | Ueno, Takamasa (1542) | Won 2-0 | +221388 |
| 4sealed | 702 | Hirata, Minoru (1680) | Lost 1-2 | -131375 |
| 5sealed | 859 | Haruyama, Hayato (1534) | Won 2-1 | +211396 |
| 6sealed | 699 | Nishikawa, Tomoya (1629) | Won 2-0 | +221418 |
| 7sealed | 712 | Takebayashi, Tomo (1857) | Lost 1-2 | -111407 |
| 8sealed | 910 | Tanaka, Atsushi (1742) | Won 2-1 | +241431 |
| 9sealed | 926 | Suzuki, Mikito (1525) | Won 2-1 | +201451 |
| 10sealed | 119 | Wada, Hiroya (1626) | Won 2-1 | +211472 |
| 11sealed | 67 | Satou, Daichi (1610) | Lost 0-2 | -151457 |
| 12draft | 115 | Imai, Ayato (1773) | Won 2-1 | +231480 |
| 13draft | 14 | K., Koudai (1613) | Lost 0-2 | -151465 |
| 14draft | 18 | Lau, Toby (1605) | Won 2-1 | +201485 |
| 15draft | 31 | Takahashi, Ryou (1512) | Won 2-1 | +191504 |
| 16draft | 2 | K., Ryo (1649) | Lost 1-2 | -161488 |
| 17draft | 53 | Sugiyama, Yuya (1834) | Won 2-1 | +241512 |
| top | average opponent: 1632record: 12-5 | new rating: 1512 | ||
| Grand Prix Yokohama 2012 (modern) | starting rating: 1404 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 71 | Tsuyuki, Kouichi (1427) | Lost 0-2 | -181386 |
| 2modern | 567 | Nakashima, Toshihiko (1420) | Lost 1-2 | -171369 |
| 3modern | 696 | Takeda, Yuya (1463) | Lost 0-2 | -171352 |
| 4modern | 701 | Akama, Kazuya (1448) | Lost 1-2 | -161336 |
| 5modern | 662 | Morishima, Ryouta (1425) | Lost 0-2 | -161320 |
| 6modern | 582 | Hashimoto, Kouichi (1295) | Won 2-0 | +171337 |
| 7modern | 477 | Sakai, Ryuusuke (1430) | Lost 1-2 | -161321 |
| 8modern | 392 | Migishiro, Ayumu (1404) | Won 2-1 | +191340 |
| 9modern | 309 | Suzuki, Masaya (1427) | Lost 0-2 | -161324 |
| top | average opponent: 1415record: 2-7 | new rating: 1324 | ||
| Grand Prix Sendai 2010 (ROE standard) | starting rating: 1433 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 116 | Yamamoto, Sadaaki (1482) | Lost 1-2 | -171416 |
| 2standard | 295 | Yamagishi, Norikazu (1425) | Lost 1-2 | -181398 |
| 3standard | 352 | Nakura, Yuki (1463) | Won 2-0 | +191417 |
| 4standard | 385 | Ishida, Yuuichi (1578) | Lost 1-2 | -151402 |
| 5standard | 356 | Hasegawa, Shigeyuki (1492) | Lost 0-2 | -161386 |
| 6standard | 347 | Okumura, Noriaki (1433) | Won 2-1 | +191405 |
| 7standard | 276 | Kobayashi, Jun (1293) | Won 2-1 | +161421 |
| 8standard | 206 | Umehara, Kei (1473) | Lost 1-2 | -171404 |
| top | average opponent: 1455record: 3-5 | new rating: 1404 | ||
| Grand Prix Yokohama 2010 (extended) | starting rating: 1445 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 188 | Watanabe, Kenji6956 (1500) | Won 2-0 | +191464 |
| 2extended | 181 | Saeki, Tomoya (1531) | Lost 0-2 | -171447 |
| 3extended | 190 | Tsukamoto, Tatsushi (1399) | Lost 1-2 | -191428 |
| 4extended | 419 | Ida, Takamasa (1439) | Lost 1-2 | -181410 |
| 5extended | 411 | Okamoto, Yuuma (1518) | Won 2-1 | +201430 |
| 6extended | 306 | Honda, Masaya (1400) | Won 2-0 | +181448 |
| 7extended | 256 | Oodan, Takeshi (1603) | Lost 1-2 | -151433 |
| 8extended | 138 | Sasaki, Yuusuke (Osaka) (1413) | Lost 1-2 | -191414 |
| 9extended | 155 | Banba, Taiki (1465) | Won 2-0 | +191433 |
| top | average opponent: 1474record: 4-5 | new rating: 1433 | ||
| Grand Prix Shizuoka 2008 (MOR standard) | starting rating: 1501 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 267 | Enatsu, Youhei (1500) | Lost 0-2 | -181483 |
| 2standard | 361 | Takahashi, Ryou (1482) | Won 2-0 | +181501 |
| 3standard | 142 | Takeuchi, Hiroto (1446) | Lost 1-2 | -191482 |
| 4standard | 361 | Okutomi, Shin (1481) | Lost 1-2 | -181464 |
| 5standard | 330 | Yamakawa, Hiroyuki (1416) | Won 2-1 | +171481 |
| 6standard | 268 | Matsumoto, Kazuya (1485) | Lost 1-2 | -181463 |
| 7standard | 145 | Hisaki, Yuu (1435) | Lost 1-2 | -181445 |
| top | average opponent: 1464record: 2-5 | new rating: 1445 | ||
| Grand Prix Yokohama 2004 (COK limited) | starting rating: 1414 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 179 | Syouyama, Youhei (1621) | Won 2-1 | +211435 |
| 2sealed | 106 | Matsui, Kazuki (1518) | Draw 1-1 | +21437 |
| 3sealed | 118 | Katou, Masanari (1561) | Won 2-1 | +201457 |
| 4sealed | 77 | Miwa, Tatsuya (1595) | Won 2-0 | +211478 |
| 5sealed | 42 | Aoyama, Daisuke (1505) | Won 2-1 | +181496 |
| 6sealed | 21 | Sugahara, Hideyuki (1527) | Won 2-0 | +191515 |
| 7sealed | 10 | Nishimura, Sho (1478) | Won 2-0 | +171532 |
| 8sealed | 26 | Morita, Masahiko (1957) | Lost 1-2 | -111521 |
| 9rochester | 14 | Suzuki, Yasutomo (1611) | Won 2-0 | +201541 |
| 10rochester | 22 | Suzuki, Masatsuna (1765) | Lost 1-2 | -141527 |
| 11rochester | 16 | Kaji, Tomohiro (1849) | Lost 0-2 | -121515 |
| 12rochester | 4 | Higashida, Keita (1574) | Won 2-0 | +191534 |
| 13rochester | 28 | Teramoto, Shoji (1610) | Lost 0-2 | -171517 |
| 14rochester | 19 | Nishiwaki, Kazuhisa (1630) | Lost 1-2 | -161501 |
| top | average opponent: 1629record: 8-5-1 | new rating: 1501 | ||
| Grand Prix Yokohama 2003 (Onslaught block) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 2block | 118 | Nakatani, Hiroshi (1573) | Lost 0-2 | -161448 |
| 3block | 303 | Mori, Daisuke (1513) | Lost 0-2 | -171431 |
| 4block | 308 | Hashimoto, Takashi (1464) | Lost 1-2 | -171414 |
| top | average opponent: 1517record: 0-3 | new rating: 1414 | ||
| Grand Prix Utsunomiya 2002 (ONS rochester) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 104 | Shoji, Tatsuro (1500) | Lost 0-2 | -181482 |
| 2sealed | 276 | Ichikawa, Kazuyuki (1482) | Lost 1-2 | -181464 |
| 3sealed | 300 | Nakazato, Takuya (1461) | Won 2-0 | +181482 |
| 4sealed | 229 | Honma, Wataru (1480) | Lost 1-2 | -181464 |
| 5sealed | 232 | Nishikawa, So (1465) | Won 2-0 | +181482 |
| 6sealed | 169 | Katsuta, Souichi (1487) | Lost 0-2 | -181464 |
| 7sealed | 155 | Sawada, Akane (1449) | Lost 1-2 | -181446 |
| 8sealed | 8 | Kamai, Daisuke (1448) | Won 2-0 | +181464 |
| top | average opponent: 1471record: 3-5 | new rating: 1464 | ||