Tatsumi, Kouji
Current rating: 1571
Record: 41-39-1
| Grand Prix Yokohama 2019 (modern) | starting rating: 1555 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 2 | Ito, Kazuma (1563) | Lost 1-2 | -181537 |
| 3modern | 715 | Nakamura, Toshihiro (1482) | Won 2-1 | +171554 |
| 4modern | 305 | Fukuji, Yuta (1667) | Won 2-1 | +201574 |
| 5modern | 497 | Kurokawa, Yuuki (1471) | Won 2-0 | +161590 |
| 6modern | 160 | Fujiwara, Ryoji (1591) | Lost 1-2 | -181572 |
| 7modern | 399 | Takahama, Norimasa (1535) | Lost 1-2 | -191553 |
| 8modern | 383 | Kodaka, Akihiro (1517) | Won 2-0 | +181571 |
| top | average opponent: 1546record: 4-3 | new rating: 1571 | ||
| Grand Prix Kobe 2017 (modern) | starting rating: 1621 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 260 | Yamamoto, Masayuki (1474) | Lost 0-2 | -211600 |
| 4modern | 828 | Hashizume, Yuuya (1537) | Lost 1-2 | -191581 |
| 5modern | 791 | Sakatani, Tsuyoshi (1561) | Lost 1-2 | -181563 |
| 6modern | 1024 | Hajime, Shogo (1477) | Won 2-0 | +161579 |
| 7modern | 664 | Suzuki, Gou (1431) | Lost 0-2 | -211558 |
| 8modern | 816 | Tsuchiya, Yoshihiro (1337) | Won 2-1 | +141572 |
| 9modern | 704 | Adachi, Naohiko (1576) | Lost 1-2 | -171555 |
| top | average opponent: 1485record: 2-5 | new rating: 1555 | ||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1535 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 137 | Muneishi, Hideaki (1451) | Won 2-1 | +171552 |
| 3standard | 156 | Hibino, Yasutaka (1631) | Won 2-1 | +191571 |
| 4standard | 232 | Masuko, Daisuke (1544) | Won 2-1 | +181589 |
| 5standard | 157 | Kuroda, Masashiro (1853) | Lost 0-2 | -141575 |
| 6standard | 317 | Niwa, Toshiharu (1558) | Won 2-1 | +181593 |
| 7standard | 183 | Mimido, Ryuji (1523) | Lost 1-2 | -191574 |
| 8standard | 341 | Hiraoka, Yuto (1511) | Won 2-0 | +171591 |
| 9standard | 183 | Anan, Kazuyoshi (1615) | Lost 0-2 | -181573 |
| 10standard | 367 | Ogawa, Ryota (1651) | Lost 0-2 | -171556 |
| 11standard | 319 | Inagaki, Yukihiro (1621) | Won 2-0 | +201576 |
| 12standard | 276 | Okamura, Takumi (1549) | Won 2-1 | +171593 |
| 13standard | 147 | Kakumae, Teruya (1969) | Won 2-0 | +251618 |
| 14standard | 138 | Tateno, Takayuki (1638) | Won 2-0 | +181636 |
| 15standard | 102 | Zhang, Zhiyang (1792) | Lost 0-2 | -151621 |
| top | average opponent: 1636record: 9-5 | new rating: 1621 | ||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1538 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 241 | Iwabuchi, Sou (1463) | Won 2-0 | +171555 |
| 3standard | 444 | Hamada, Yuusai (1508) | Lost 0-2 | -191536 |
| 4standard | 521 | Shibata, Ryouto (1487) | Won 2-1 | +171553 |
| 5standard | 452 | Iijima, Shin (1537) | Won 2-1 | +181571 |
| 6standard | 330 | Ichikawa, Tomokazu (1487) | Lost 0-2 | -201551 |
| 7standard | 331 | Hitomi, Keita (1534) | Lost 1-2 | -181533 |
| 8standard | 584 | Sugimura, Yoshiyasu (1652) | Lost 0-2 | -161517 |
| 9standard | 759 | Takemura, Yuuki (1507) | Won 2-1 | +181535 |
| top | average opponent: 1522record: 4-4 | new rating: 1535 | ||
| Grand Prix Yokohama 2013 (GTC limited) | starting rating: 1560 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 102 | Morita, Kouki (1604) | Won 2-1 | +191579 |
| 3sealed | 97 | Uehara, Jin (1523) | Lost 1-2 | -191560 |
| 4sealed | 202 | Matsumoto, Yoshifumi (1540) | Lost 0-2 | -191541 |
| 5sealed | 243 | Shimamura, Kazushige (1501) | Won 2-0 | +181559 |
| 6sealed | 246 | Nakagawa, Jin (1517) | Lost 0-2 | -191540 |
| 7sealed | 231 | Yajima, Yasunori (1500) | Won 2-0 | +171557 |
| 8sealed | 313 | Tateoka, Tomoki (1518) | Lost 1-2 | -191538 |
| top | average opponent: 1529record: 3-4 | new rating: 1538 | ||
| Grand Prix Yokohama 2012 (modern) | starting rating: 1467 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 158 | Suzuki, Akira (1505) | Won 2-0 | +191486 |
| 3modern | 34 | Imai, Ayato (1686) | Won 2-0 | +211507 |
| 4modern | 32 | Nagai, Mamoru (1607) | Won 2-0 | +201527 |
| 5modern | 44 | Asakura, Yoshitomo (1551) | Won 2-1 | +191546 |
| 6modern | 25 | Yukuhiro, Ken (2073) | Won 2-1 | +271573 |
| 7modern | 1 | Toyota, Shimpei (1661) | Lost 1-2 | -171556 |
| 8modern | 25 | Morita, Masahiko (1900) | Won 2-1 | +241580 |
| 9modern | 11 | Maki, Yousuke (1573) | Lost 0-2 | -181562 |
| 10modern | 50 | Takamizu, Tomohiro (1592) | Lost 1-2 | -171545 |
| 11modern | 79 | Yabuta, Junichi (1732) | Won 2-0 | +211566 |
| 12modern | 66 | Murase, Hiroshi (1782) | Lost 0-2 | -141552 |
| 13modern | 70 | Ebihara, Hirotaka (1579) | Lost 1-2 | -181534 |
| 14modern | 69 | Inoue, Hiroyuki (1546) | Won 2-0 | +191553 |
| 15modern | 59 | Chiba, Akio (1913) | Lost 0-2 | -121541 |
| 16modern | 63 | Kobayashi, Masanori (1602) | Won 2-1 | +191560 |
| top | average opponent: 1687record: 9-6 | new rating: 1560 | ||
| Grand Prix Kobe 2009 (extended) | starting rating: 1519 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 118 | Inatsugu, Takahiro (1519) | Lost 1-2 | -181501 |
| 3extended | 103 | Eda, Takeshi (1609) | Lost 1-2 | -161485 |
| 4extended | 222 | Asano, Jun'ya (1515) | Lost 0-2 | -181467 |
| top | average opponent: 1547record: 0-3 | new rating: 1467 | ||
| Grand Prix Kobe 2008 (Lorwyn block) | starting rating: 1536 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 204 | Ohmura, Satoshi (1510) | Won 2-1 | +181554 |
| 2block | 53 | Kataoka, Asami (1548) | Draw 1-1 | 01554 |
| 3block | 127 | Yoshihira, Yuuya (1517) | Lost 1-2 | -191535 |
| 4block | 251 | Higashida, Keita (1538) | Won 2-0 | +181553 |
| 5block | 172 | Suzuki, Yuuji (Chiba (1503) | Lost 1-2 | -191534 |
| 6block | 236 | Aizawa, Keiji (1672) | Lost 0-2 | -151519 |
| top | average opponent: 1548record: 2-3-1 | new rating: 1519 | ||
| Grand Prix Kyoto 2007 (PLC standard) | starting rating: 1536 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 256 | Ookawa, Yuusuke (1500) | Lost 1-2 | -191517 |
| 2standard | 252 | Hirabayashi, Tatsurou (1467) | Lost 0-2 | -191498 |
| 3standard | 337 | Negami, Hiroyuki (1515) | Won 2-0 | +191517 |
| 4standard | 310 | Terao, Manato (1432) | Lost 0-2 | -201497 |
| 5standard | 341 | Gotou, Atsushi (1463) | Won 2-1 | +181515 |
| 6standard | 252 | Hassaku, Jinpei (1724) | Won 2-1 | +211536 |
| top | average opponent: 1517record: 3-3 | new rating: 1536 | ||
| Grand Prix Kobe 2001 (Invasion block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 226 | Matsuda, Yoshiki (1500) | Won 2-0 | +181518 |
| 2block | 95 | Lee, Sang-Ryeol (1500) | Won 2-1 | +181536 |
| 3block | 60 | Suga, Takeichi (1471) | Won 2-1 | +161552 |
| 4block | 44 | Asahara, Akira (1593) | Won 2-0 | +191571 |
| 5block | 61 | Nakamura, Kazuhito (1571) | Lost 0-2 | -181553 |
| 6block | 78 | Takubo, Yasuhiro (1518) | Won 2-1 | +181571 |
| 7block | 77 | Yamagami, Yudai (1647) | Lost 1-2 | -171554 |
| 8block | 86 | Tamura, Kenichi (1555) | Lost 0-2 | -181536 |
| top | average opponent: 1544record: 5-3 | new rating: 1536 | ||