Tanaka, Ittoku
Current rating: 1529
Record: 14-14-1
| Grand Prix Okayama 2008 (ALA limited) | starting rating: 1487 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 255 | Sumita, Masanobu (1617) | Won 0-0 | +201507 |
| 2sealed | 149 | Ouchi, Akimasa (1487) | Lost 1-2 | -181489 |
| 3sealed | 113 | Yamada, Tsutomu (1480) | Won 2-0 | +181507 |
| 4sealed | 116 | Anan, Kazuyoshi (1505) | Won 2-1 | +181525 |
| 5sealed | 108 | Omori, Tomoaki (1695) | Lost 0-2 | -151510 |
| 6sealed | 19 | Matsunaga, Kazuki (1479) | Won 2-0 | +171527 |
| 7sealed | 128 | Tanaka, Atsushi (1654) | Won 2-1 | +201547 |
| 8sealed | 119 | Shindo, Yoshiya (1524) | Lost 1-2 | -181529 |
| top | average opponent: 1555record: 5-3 | new rating: 1529 | ||
| Grand Prix Sapporo 2002 (Odyssey block) | starting rating: 1466 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 26 | Jinbo, Kazuto (1518) | Draw 1-1 | +11467 |
| 2block | 123 | Takagi, Riichiro (1499) | Won 2-1 | +191486 |
| 3block | 85 | Tsuchida, Shinnosuke (1517) | Won 2-1 | +181504 |
| 4block | 57 | Aita, Hiroki (1518) | Won 2-0 | +181522 |
| 5block | 26 | Kimura, Toru (1477) | Lost 0-2 | -181504 |
| 6block | 66 | Funatou, Tsukasa (1568) | Lost 0-2 | -171487 |
| top | average opponent: 1516record: 3-2-1 | new rating: 1487 | ||
| Grand Prix Hiroshima 2001 (INV limited) | starting rating: 1483 | |||
| round | table | opponent (rating) | result | Δrating |
| 4sealed | 26 | Ando, Rage (1500) | Won 2-1 | +181501 |
| 5sealed | 18 | Fujita, Tsuyoshi (1884) | Lost 1-2 | -111490 |
| 6sealed | 38 | Furujou, Takashi (1553) | Won 2-1 | +191509 |
| 7sealed | 11 | Nakamura, Satoshi (1711) | Won 2-1 | +221531 |
| 8draft | 5 | Murata, Kouji (1639) | Won 2-1 | +201551 |
| 9draft | 6 | Morita, Masahiko (1568) | Lost 0-2 | -181533 |
| 10draft | 8 | Ishida, Itaru (1595) | Lost 0-2 | -171516 |
| 11draft | 17 | Murata, Kouji (1617) | Lost 0-2 | -161500 |
| 12draft | 17 | Kobayashi, Hideki (1557) | Lost 0-2 | -171483 |
| 13draft | 25 | Koura, Masahiro (1544) | Lost 1-2 | -171466 |
| top | average opponent: 1617record: 4-6 | new rating: 1466 | ||
| Grand Prix Kyoto 2000 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 3extended | 15 | Takigawa, Wataru (1518) | Lost 0-2 | -181482 |
| 4extended | 170 | Shikata, Nobuaki (1481) | Won 2-0 | +181500 |
| 5extended | 138 | Kuze, Shouta (1500) | Lost 0-2 | -181482 |
| 6extended | 167 | Yoshimura, Motoki (1517) | Won 2-1 | +191501 |
| 7extended | 72 | Abe, Ryou (1501) | Lost 0-2 | -181483 |
| top | average opponent: 1504record: 2-3 | new rating: 1483 | ||