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38 Kanto Championship
2021-08-07 -> 2021-08-08
Rating: 1919.66 -> 1935.52
Opponent Rating Round Result R. Change
Inoue Fumiya 2201 1
loss
 -5.29
Kobayashi Nanako   2
win
 -
Fujita Maiko 2035 3
win
 +21.15
16th All Japan Championship
2021-03-27 -> 2021-03-28
Rating: 1945.12 -> 1919.66
Opponent Rating Round Result R. Change
Makino Mitsunori 2365 1
loss
 -2.62
Ishitani Shin-ichi 2222 2
loss
 -5.40
Yoshimoto Yuta   3
loss
 -
Kawaai Hitoshi 1885 4
loss
 -18.70
Suenaga Daiki 1935 5
loss
 -16.46
Maruta Hiroki 1982 6
win
 +17.72
24th New Year(Mikami)Cup
2021-01-29
Rating: 1943.43 -> 1945.12
Opponent Rating Round Result R. Change
Maruta Hiroki 2029 S1
win
 +19.86
Makino Mitsunori 2329 S2
loss
 -3.12
Okabe Hiroshi 2505 S3
loss
 -1.21
Ono Takayuki 2175 S4
loss
 -6.66
Ishitani Shin-ichi 2158 S5
loss
 -7.18
21 Renju Emperor Tournament Kanto area 1st round
2020-11-15
Rating: 1963.55 -> 1943.43
Opponent Rating Round Result R. Change
Kawaai Hitoshi 1872 1
loss
 -20.11
Suenaga Daiki   2
loss
 -
Shimura Hiroki   3
loss
 -
Kasahara Reiko   4
win
 -
37 Kanto Championship
2020-08-09 -> 2020-08-10
Rating: 1985.05 -> 1963.55
Opponent Rating Round Result R. Change
Okada Akihiro   3
win
 -
Kato Yasuhiro 1860 5
loss
 -21.50
Shimura Hiroki   6
win
 -
58 Meijinsen Qualification Kanto area 1st round
2020-06-21
Rating: 1995.97 -> 1985.05
Opponent Rating Round Result R. Change
Fujita Maiko 2110 1
loss
 -10.93
Ito Midori   2
win
 -
20 Renju Emperor Tournament Kanto area 1st round
2019-11-10
Rating: 1986.74 -> 1995.97
Opponent Rating Round Result R. Change
Shibata Satoru   2
win
 -
Ishitani Shin-ichi 2212 3
loss
 -6.86
Tomobe Katsuhiro 1988 4
win
 +16.10
36 Kanto Championship
2019-07-27 -> 2019-07-28
Rating: 1998.17 -> 1986.74
Opponent Rating Round Result R. Change
Shibata Satoru   5
win
 -
Miyamoto Syunju 2100 6
loss
 -11.43
57 Meijinsen Qualification East Japan area 2nd round
2019-06-23
Rating: 1995.11 -> 1998.17
Opponent Rating Round Result R. Change
Kusajima Masato 2117 1
loss
 -10.59
Koyama Jun 2283 2
loss
 -5.10
Maruta Hiroki 1984 3
win
 +15.50
Ono Takayuki 2207 4
loss
 -7.29
Inoue Fumiya 2269 5
draw
 +10.54
57 Meijinsen Qualification Kanto area 1st round
2019-05-12
Rating: 1968.81 -> 1995.11
Opponent Rating Round Result R. Change
Inoue Fumiya 2277 1
win
 +27.38
Maruta Hiroki 1961 2
win
 +15.64
Ono Takayuki 2154 3
loss
 -8.19
Mitsumori Masao 2144 4
loss
 -8.54
13 Middle-dan Players Tournament
2018-08-11 -> 2018-08-12
Rating: 2025.77 -> 1968.81
Opponent Rating Round Result R. Change
Kusajima Masato 2095 1
loss
 -12.83
Miyamoto Syunju 2033 2
loss
 -15.65
Kusajima Masato 2095 4
loss
 -12.83
Miyamoto Syunju 2033 5
loss
 -15.65
35 Kanto Championship
2018-07-15 -> 2018-07-16
Rating: 2026.72 -> 2025.77
Opponent Rating Round Result R. Change
Nakayama Tomoharu 2633 1
loss
 -0.94
56 Meijinsen Qualification Kanto area 1st round
2018-05-13
Rating: 2034.06 -> 2026.72
Opponent Rating Round Result R. Change
Sato Kiyotomi 2244 1
loss
 -7.35
12th All Japan Championship
2017-03-25 -> 2017-03-26
Rating: 2028.63 -> 2034.06
Opponent Rating Round Result R. Change
Iio Yoshihiro 2382 1
draw
 +12.30
Tachi Masaya 2205 2
loss
 -8.50
Nishida Toshio 2020 3
draw
 -0.36
Ono Takayuki 2081 4
loss
 -13.60
Sakamoto Hirouji 2151 5
win
 +21.45
Fujita Yudai 2288 6
loss
 -5.86
17 Kanto Renju Emperor Tournament 2nd round
2016-12-10
Rating: 2047.32 -> 2028.63
Opponent Rating Round Result R. Change
Nakayama Tomoharu 2547 1
loss
 -1.70
Okabe Hiroshi 2466 2
loss
 -2.62
Sato Kiyotomi 2347 3
loss
 -4.83
Ishitani Shin-ichi 2215 4
loss
 -8.82
Nakamura Shigeru 2702 5
loss
 -0.72
33 Kanto Championship
2016-07-30 -> 2016-07-31
Rating: 2041.02 -> 2047.32
Opponent Rating Round Result R. Change
Cho Enkun   1
win
 -
Okabe Hiroshi 2503 2
loss
 -2.09
Kato Yasuhiro 1861 3
win
 +8.39
54 Meijinsen Qualification Kanto area 1st round
2016-05-22
Rating: 2039.21 -> 2041.02
Opponent Rating Round Result R. Change
Sato Kiyotomi 2362 2
loss
 -4.31
Iwano Fumio 2102 3
win
 +18.88
Mitsumori Masao 2110 4
loss
 -12.77
11th All Japan Championship
2016-01-10 -> 2016-01-11
Rating: 2030.84 -> 2039.21
Opponent Rating Round Result R. Change
Kamiya Shunsuke 2430 1
loss
 -2.91
Chigira Makoto   2
draw
 -
Fujita Yudai 2158 3
loss
 -10.38
Kato Yasuhiro 1895 5
win
 +10.05
Suzuki Rin 1933 6
win
 +11.62
17 Kanto Renju Emperor Tournament 1st round
2016-11-23 -> 2015-11-23
Rating: 2039.72 -> 2030.84
Opponent Rating Round Result R. Change
Okabe Hiroshi 2471 1
loss
 -2.46
Demachi Koichiro   2
win
 -
Sato Kiyotomi 2296 3
loss
 -5.94
Maruta Hiroki 1978 4
win
 +13.19
Iwano Fumio 2090 ex1
loss
 -13.67
Kanto Championship
2015-07-19 -> 2015-07-20
Rating: 2020.74 -> 2039.72
Opponent Rating Round Result R. Change
Nakayama Tomoharu 2495 1
loss
 -1.96
Hashimoto Takuya   4
win
 -
Kato Yasuhiro 1911 5
win
 +11.14
Fujikawa Masaki 1878 6
win
 +9.80
10th All Japan Championship
2015-03-28 -> 2015-03-29
Rating: 2014.06 -> 2020.74
Opponent Rating Round Result R. Change
Kamiya Shunsuke 2374 1
loss
 -3.57
Fujikawa Masaki 1883 2
win
 +10.24
31th Kanto Championship
2014-05-11
Rating: 2018.48 -> 2014.06
Opponent Rating Round Result R. Change
Tamura Kazumasa 2337 2
loss
 -4.40
Tomobe Katsuhiro 2029 3
loss
 -15.50
Maruta Hiroki 2007 4
win
 +15.48
11th Middle-dan players Tournament
2013-08-16 -> 2013-08-17
Rating: 1984.47 -> 2018.48
Opponent Rating Round Result R. Change
Kashihara Akihiko 2219 1
loss
 -6.58
Kato Yasuhiro 2056 2
loss
 -12.71
Maruta Hiroki 2022 3
win
 +17.73
Kubo Izumi 1995 4
win
 +16.52
Miyagawa Junzo 2103 5
win
 +21.28
Nakayama Tomoharu 2434 6
loss
 -2.23
51 Meijinsen Qualification East-Japan area 1st round
2013-06-16
Rating: 1989.81 -> 1984.47
Opponent Rating Round Result R. Change
Isobe Taizan 2269 1
loss
 -5.34
29th Kanto Championship
2013-05-12
Rating: 1984.89 -> 1989.81
Opponent Rating Round Result R. Change
Suzuki Rin 1938 3
loss
 -18.13
Nakamura Souta   4
win
 -
Tada Ayako 2149 5
win
 +23.04
13 Kanto Renju Emperor Tournament 1st round
2012-10-21
Rating: 1971.93 -> 1984.89
Opponent Rating Round Result R. Change
Higuchi Fumiya   1
win
 -
Mitsumori Masao 2251 2
win
 +26.68
Tada Ayako 2140 3
loss
 -8.80
Ishitani Shin-ichi 2268 4
loss
 -4.91
50 Meijinsen Qualification East-Japan area 1st round
2012-06-03
Rating: 1985.36 -> 1971.93
Opponent Rating Round Result R. Change
Mitsumori Masao 2242 1
loss
 -5.92
Iwano Fumio 2027 2
loss
 -14.05
Ono Takayuki 2207 3
loss
 -6.96
Maruta Hiroki 1930 4
win
 +13.50
4th Tohoku Championship
2012-04-08
Rating: 1979.1 -> 1985.36
Opponent Rating Round Result R. Change
Nakamura Shigeru 2696 1
loss
 -0.51
Maruta Hiroki 2000 2
win
 +16.98
Kobayashi Koichi 2020 3
loss
 -14.10
Kusajima Masato 2250 4
loss
 -5.55
Hirono Masakazu 1827 5
win
 +9.45
12 Kanto Renju Emperor Tournament 1st round
2011-10-23
Rating: 1985.5 -> 1979.1
Opponent Rating Round Result R. Change
Kamiya Shunsuke 2226 1
loss
 -6.40
49 Meijinsen Qualification East-Japan area 1st round
2011-06-12
Rating: 1991.37 -> 1985.5
Opponent Rating Round Result R. Change
Kamiya Shunsuke 2250 1
loss
 -5.87
28th Kanto Championship
2011-05-22
Rating: 2032.99 -> 1991.37
Opponent Rating Round Result R. Change
Nakayama Tomoharu 2323 1
loss
 -5.07
Arai Kazumi 2156 2
loss
 -10.53
Suzuki Rin 1901 3
loss
 -21.77
Maruta Hiroki 2035 4
win
 +16.12
Fujikawa Masaki 1935 5
loss
 -20.37
11 Kanto Renju Emperor Tournament 1st round
2010-10-31
Rating: 2018.46 -> 2032.99
Opponent Rating Round Result R. Change
Kato Yasuhiro 2020 1
win
 +16.08
Okabe Hiroshi 2536 2
loss
 -1.55
Meijinsen Qualification East-Japan area 1st round
2010-06-27
Rating: 2031.02 -> 2018.46
Opponent Rating Round Result R. Change
Fukui Nobuhiro 2187 1
loss
 -9.23
Arai Kazumi 2166 2
win
 +21.93
Kudomi Takahiro 2231 3
loss
 -7.67
Tada Ayako 1996 4
loss
 -17.60
27th Kanto Championship
2010-05-23
Rating: 2049.17 -> 2031.02
Opponent Rating Round Result R. Change
Nakamura Shigeru 2689 1
loss
 -0.78
Tomobe Katsuhiro 2019 2
loss
 -17.37
5th All Japan Championship
2010-03-20 -> 2010-03-21
Rating: 2021.78 -> 2049.17
Opponent Rating Round Result R. Change
Kusajima Masato 2331 4
win
 +27.39
10 Kanto Renju Emperor Tournament 1st round
2009-10-04
Rating: 2033.39 -> 2021.78
Opponent Rating Round Result R. Change
Tanji Hiroki 1939 1
loss
 -20.24
Tomobe Katsuhiro 1947 2
loss
 -19.88
Tanizaki Ryusuke 2029 3
win
 +15.84
Fujikawa Masaki 1959 4
win
 +12.66
26th Kanto Championship
2009-05-17
Rating: 2016 -> 2033.39
Opponent Rating Round Result R. Change
Matsuoka Teruo 1752 4
win
 +5.75
Kato Yasuhiro 1919 5
win
 +11.65
RIF update 2009-05-15
2009-05-15
Rating: 2009.44 -> 2016
4th All Japan Championship
2009-03-20 -> 2009-03-21
Rating: 2026.54 -> 2009.44
Opponent Rating Round Result R. Change
Suzuki Rin 1884 4
win
 +9.82
Tanizaki Ryusuke 2029 5
loss
 -15.85
Nagao Noriaki 2137 6
loss
 -11.06
9th Kanto Renju Emperor Tournament, 1st round
2008-10-26
Rating: 2049.84 -> 2026.54
Opponent Rating Round Result R. Change
Tamada Yoichi 2059 1
draw
 +0.46
Tada Ayako   2
win
 -
Ono Takayuki 2266 3
loss
 -7.13
Nakayama Tomoharu 2036 4
loss
 -16.63
25th Kanto Championship
2008-05-18
Rating: 2023.25 -> 2049.84
Opponent Rating Round Result R. Change
Tanizaki Ryusuke 2033 3
win
 +16.47
Kobayashi Koichi 2049 4
win
 +17.19
Kudomi Takahiro 2242 5
loss
 -7.06
3rd All Japan Championship
2008-03-22 -> 2008-03-23
Rating: 2092.45 -> 2023.25
Opponent Rating Round Result R. Change
Yamaguchi Yusui 2570 1
loss
 -1.92
Kato Yasuhiro 1858 2
loss
 -25.39
Tadokoro Hosai 1933 3
loss
 -22.83
Fujikawa Masaki 2051 4
loss
 -17.90
Nakayama Tomoharu   5
loss
 -
Tanizaki Ryusuke 2066 6
draw
 -1.18
8 Kanto Renju Emperor Tournament 1st round
2007-10-21
Rating: 2096.42 -> 2092.45
Opponent Rating Round Result R. Change
Takeuchi Shunsuke   1
win
 -
Yamashita Daisuke   2
win
 -
Ishitani Shin-ichi 2201 3
loss
 -11.31
Nakayama Tomoharu   4
loss
 -
Matsuoka Teruo 1886 5
win
 +7.35
45th Meijinsen Qualification East-Japan area 1st round
2007-06-17
Rating: 2089.19 -> 2096.42
Opponent Rating Round Result R. Change
Tanizaki Ryusuke 2094 1
win
 +16.25
Isobe Taizan 2289 2
loss
 -7.69
Iwano Fumio 2068 3
loss
 -16.97
Hara Masao 2081 4
win
 +15.65
7th Kanto Renju Emperor Tournament - 1st round
2006-10-15
Rating: 2103.38 -> 2089.19
Opponent Rating Round Result R. Change
Matsuoka Teruo 1903 1
win
 +7.70
Maruta Hiroki 1880 2
loss
 -25.05
Fujikawa Masaki 1909 3
win
 +7.90
Hara Masao 2070 4
loss
 -17.51
Tanizaki Ryusuke 2032 5
win
 +12.77
Meijin-sen Qual, East Japan area 1st round
2006-06-18
Rating: 2159.98 -> 2103.38
Opponent Rating Round Result R. Change
Koyama Jun 2261 1
loss
 -11.47
Arita Nobuyoshi 2288 2
loss
 -10.33
Ono Takayuki 2192 3
loss
 -14.50
Hara Masao 2064 4
loss
 -20.30
23rd Kanto Championship
2006-05-21
Rating: 2184.7 -> 2159.98
Opponent Rating Round Result R. Change
Iwano Fumio 1937 1
win
 +6.21
Mitsumori Masao 2221 2
loss
 -14.30
Tadokoro Hosai 1953 3
win
 +6.68
Nakamura Shigeru 2841 4
loss
 -0.71
Hara Masao 2032 5
loss
 -22.60
1st All Japan Championship
2006-03-25 -> 2006-03-26
Rating: 2153.66 -> 2184.7
Opponent Rating Round Result R. Change
Tadokoro Hosai 1982 4
win
 +8.70
Kato Yasuhiro 2048 5
win
 +11.29
Tomobe Katsuhiro 2042 6
win
 +11.05
6th Kanto Renju Emperor Tournament - 1st round
2005-10-22
Rating: 2205.9 -> 2153.66
Opponent Rating Round Result R. Change
Iwano Fumio 1963 1
win
 +6.37
Itami Yoshiyuki 2118 2
loss
 -19.92
Tomobe Katsuhiro 1996 3
loss
 -24.62
Arita Nobuyoshi 2248 4
loss
 -14.06
43rd Meijinsen Qualification: East Japan 1st round
2005-06-12
Rating: 2263.08 -> 2205.9
Opponent Rating Round Result R. Change
Koyama Jun 2232 1
loss
 -17.39
Tanno Yoshitaka 2055 2
win
 +7.43
Nagao Noriaki 2118 3
loss
 -22.31
Itami Yoshiyuki 2044 4
loss
 -24.91
22nd Kanto Championship
2005-05-22
Rating: 2263.5 -> 2263.08
Opponent Rating Round Result R. Change
Ishizaki Masatoshi   1
win
 -
Kawamura Norihiko 2752 2
loss
 -1.81
Sasaki Miyu   3
win
 -
Koyama Jun 2231 4
win
 +14.54
Ishitani Shin-ichi 2325 5
loss
 -13.15
Japan WC Qualification tournament
2005-04-02 -> 2005-04-03
Rating: 2275.54 -> 2263.5
Opponent Rating Round Result R. Change
Tanizaki Ryusuke   4
win
 -
Kato Yasuhiro 2028 5
win
 +6.22
Kubo Izumi 2226 6
loss
 -18.26
5th Kanto Renju Emperor Tournament - 1st round
2004-11-28
Rating: 2275.54 -> 2275.54
Opponent Rating Round Result R. Change
Sato Koichi   1
loss
 -
Sasaki Miyu   2
win
 -
Maruta Hiroki   3
win
 -
Matsuoka Teruo   4
win
 -
42nd Meijinsen Qualification: East Japan 1st round
2004-06-13
Rating: 2275.54 -> 2275.54
Opponent Rating Round Result R. Change
Sano Hiroyuki   4
loss
 -
4th Kanto Renju Emperor Tournament - 2nd round
2003-11-30
Rating: 2276.7 -> 2275.54
Opponent Rating Round Result R. Change
Nagao Noriaki 2125
win
 +9.46
Mitsumori Masao 2317
win
 +17.85
Isobe Taizan 2343
loss
 -12.94
Yamaguchi Yusui 2477
loss
 -7.67
Okabe Hiroshi 2471
loss
 -7.86
4th Kanto Renju Emperor Tournament - 1st round
2003-11-16
Rating: 2242.6 -> 2276.7
Opponent Rating Round Result R. Change
Yamauchi Yasuhiro   1
win
 -
Nagao Noriaki 2137 2
win
 +11.29
Yamaguchi Yusui 2471 3
draw
 +9.23
Kubo Izumi 2189 4
win
 +13.58
41th Meijinsen Qualification: East Japan 1st round
2003-06-08
Rating: 2221.5 -> 2242.6
Opponent Rating Round Result R. Change
Sano Hiroyuki   1
loss
 -
Mitsumori Masao 2384 2
win
 +22.99
Sato Kiyotomi   3
loss
 -
Kubo Izumi 2180 4
draw
 -1.89
40th Meijinsen Qualification: East Japan 1st round
2002-06-02
Rating: 2221 = 2330 + (400 * (4 - 7)) / 11
Opponent Rating Round Result R. Change
Isobe Taizan 2443 1
loss
 -
Kato Yasuhiro 2046 2
loss
 -
Ohno Syunzo 2091 3
win
 -
Sato Takuma   4
win
 -
38th Meijinsen Qualification: East Japan 1st round
2000-06-04
Provisional: 2281 = 2381 + (400 * (3 - 5)) / 8
Opponent Rating Round Result R. Change
Sunagawa Shouki 2291 1
win
 -
Mitsumori Masao 2395 2
win
 -
Kudomi Takahiro 2237 3
loss
 -
Isobe Taizan 2419 4
loss
 -
Kanto Championship
2000-05-14
Provisional: 2228 = 2428 + (400 * (1 - 3)) / 4
Opponent Rating Round Result R. Change
Nakamura Shigeru 2863 1
loss
 -
Hara Masao   2
loss
 -
Tadokoro Hosai   3
win
 -
Kato Yasuhiro 2026 4
win
 -
RIF update 1999-12-31
1999-12-31
Provisional: 2012 = 2412 + (400 * (0 - 2)) / 2
36 Suiseisen Tournament 1st round
0000-00-00 -> 1996-12-31
Provisional: N/A
Opponent Rating Round Result R. Change
Tanuma Akira   4
win
 -
Name: Koji
Surname: Maruta
Rating: 1935
Top Rating: 2276

Country: Japan
City: Tokyo

Wins: 84
Losses: 120
Draws: 8
Gy1: 0
Gy2: 2
Gy5: 32
Hover the mouse over the opponent's name to see the personal score of Koji Maruta with this player.
Time: 0.029490947723389 sec.