Izumiya, Yoshiaki
Current rating: 1559
Record: 19-17-4
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1504 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 243 | Matsuura, Shuhei (1495) | Draw 1-1 | 01504 |
| 2standard | 610 | Hirooka, Hideki (1439) | Won 2-0 | +171521 |
| 3standard | 691 | Hashizume, Yuuya (1544) | Won 2-1 | +181539 |
| 4standard | 358 | Koyama, Yuji (1750) | Won 2-1 | +221561 |
| 5standard | 178 | Tamura, Youhei (1619) | Draw 1-1 | +11562 |
| 6standard | 390 | Kawakami, Tomonobu (1551) | Lost 0-1 | -181544 |
| 7standard | 608 | Sano, Takumi (1443) | Won 2-1 | +161560 |
| 8standard | 419 | Oono, Takamasa (1557) | Lost 0-2 | -181542 |
| 9standard | 585 | Iwama, Gaku (1523) | Won 2-1 | +171559 |
| top | average opponent: 1547record: 5-2-2 | new rating: 1559 | ||
| Grand Prix Sendai 2010 (ROE standard) | starting rating: 1543 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 135 | SNYDER, DANIEL C (1500) | Lost 0-2 | -191524 |
| 2standard | 359 | Kitani, Ryouta (1467) | Draw 1-1 | -11523 |
| 3standard | 308 | Tsuboyama, Shuta (1468) | Lost 0-2 | -191504 |
| top | average opponent: 1478record: 0-2-1 | new rating: 1504 | ||
| Grand Prix Yokohama 2010 (extended) | starting rating: 1543 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 71 | Take, Toshiharu (1546) | Won 2-1 | +181561 |
| 2extended | 118 | Ohno, Hirofumi (1518) | Lost 1-2 | -191542 |
| 3extended | 365 | Kawakami, Hiroshi (1661) | Lost 1-2 | -151527 |
| 4extended | 357 | Hoshino, Shinsuke (1553) | Won 2-0 | +181545 |
| 5extended | 305 | Ozawa, Takahiro (1667) | Draw 1-1 | +21547 |
| 6extended | 295 | Mizuhara, Yoshitaka (1499) | Won 2-1 | +171564 |
| 7extended | 212 | Nakamichi, Daisuke (1494) | Won 2-0 | +171581 |
| 8extended | 148 | Kobayashi, Tatsuumi (1525) | Lost 0-2 | -191562 |
| 9extended | 130 | Date, Hideyuki (1486) | Lost 0-2 | -191543 |
| top | average opponent: 1550record: 4-4-1 | new rating: 1543 | ||
| Grand Prix Okayama 2008 (ALA limited) | starting rating: 1514 | |||
| round | table | opponent (rating) | result | Δrating |
| 4sealed | 49 | Kumoura, Daisuke (1581) | Won 2-0 | +191533 |
| 5sealed | 29 | Iwasaki, Yuusuke (1900) | Lost 0-2 | -111522 |
| 6sealed | 134 | Ishibashi, Satoshi (1576) | Lost 1-2 | -171505 |
| 7sealed | 131 | Nakamura, Yuichiro (1647) | Won 2-0 | +201525 |
| 8sealed | 112 | Iwai, Tsuyoshi (1519) | Won 2-1 | +181543 |
| top | average opponent: 1645record: 3-2 | new rating: 1543 | ||
| Grand Prix Kobe 2008 (Lorwyn block) | starting rating: 1487 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 127 | Takeshita, Yoshiyasu (1500) | Won 2-0 | +181505 |
| 2block | 144 | Nishihara, Hiroki (1518) | Won 2-0 | +181523 |
| 3block | 28 | Yamashita, Kouhei (1567) | Won 2-0 | +191542 |
| 4block | 81 | Sasahara, Yasufumi (1707) | Lost 1-2 | -151527 |
| 5block | 149 | Yoshinaga, Mitsuteru (1562) | Lost 0-2 | -181509 |
| 6block | 190 | Toyama, Junichiro (1445) | Won 2-1 | +171526 |
| 7block | 94 | Isozaki, Yasuaki (1530) | Lost 1-2 | -181508 |
| 8block | 158 | Kagami, Gen (1627) | Won 2-0 | +201528 |
| 9block | 99 | Imagawa, Hiromasa (1727) | Lost 0-2 | -141514 |
| top | average opponent: 1576record: 5-4 | new rating: 1514 | ||
| Grand Prix Shizuoka 2008 (MOR standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 98 | Kurakami, Shun (1636) | Lost 0-2 | -161484 |
| 3standard | 147 | Ishikawa, Yoshitaka (1499) | Won 2-0 | +191503 |
| 4standard | 132 | Tezuka, Yuuki (1443) | Won 2-0 | +171520 |
| 5standard | 59 | Katayose, Shingo (1655) | Lost 1-2 | -161504 |
| 6standard | 180 | Aoyama, Katsuhiko (1527) | Lost 1-2 | -171487 |
| top | average opponent: 1552record: 2-3 | new rating: 1487 | ||