12th All Japan Championship
2017-03-25 -> 2017-03-26
Rating: 2021.35 -> 2030.16
Opponent Rating Round Result R. Change
Iio Yoshihiro 2391 1
draw
+12.60
Tachi Masaya 2198 2
loss
-8.47
Nishida Toshio 2009 3
draw
-0.54
Ono Takayuki 2140 4
loss
-10.72
Sakamoto Hirouji 2153 5
win
+21.79
Fujita Yudai 2281 6
loss
-5.85
17 Kanto Renju Emperor Tournament 2nd round
2016-12-10
Rating: 2040.48 -> 2021.35
Opponent Rating Round Result R. Change
Nakayama Tomoharu 2551 1
loss
-1.61
Okabe Hiroshi 2456 2
loss
-2.67
Sato Kiyotomi 2339 3
loss
-4.85
Ishitani Shin-ichi 2204 4
loss
-8.96
Nakamura Shigeru 2629 5
loss
-1.04
54 Meijinsen Qualification Kanto area 1st round
2016-05-22
Rating: 2039.45 -> 2040.48
Opponent Rating Round Result R. Change
Sato Kiyotomi 2354 2
loss
-4.48
Iwano Fumio 2089 3
win
+18.30
Mitsumori Masao 2110 4
loss
-12.79
Kanto Championship
2015-07-19 -> 2015-07-20
Rating: 2020.48 -> 2039.45
Opponent Rating Round Result R. Change
Nakayama Tomoharu 2493 1
loss
-1.98
Hashimoto Takuya   4
win
-
Kato Yasuhiro 1911 5
win
+11.14
Fujikawa Masaki 1878 6
win
+9.81
10th All Japan Championship
2015-03-28 -> 2015-03-29
Rating: 2013.8 -> 2020.48
Opponent Rating Round Result R. Change
Kamiya Shunsuke 2374 1
loss
-3.57
Fujikawa Masaki 1883 2
win
+10.25
31th Kanto Championship
2014-05-11
Rating: 2018.21 -> 2013.8
Opponent Rating Round Result R. Change
Tamura Kazumasa 2336 2
loss
-4.41
Tomobe Katsuhiro 2029 3
loss
-15.49
Maruta Hiroki 2007 4
win
+15.49
11th Middle-dan players Tournament
2013-08-16 -> 2013-08-17
Rating: 1984.28 -> 2018.21
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
+17.74
Kubo Izumi 1996 4
win
+16.54
Miyagawa Junzo 2103 5
win
+21.30
Nakayama Tomoharu 2424 6
loss
-2.35
51 Meijinsen Qualification East-Japan area 1st round
2013-06-16
Rating: 1989.55 -> 1984.28
Opponent Rating Round Result R. Change
Isobe Taizan 2271 1
loss
-5.28
29th Kanto Championship
2013-05-12
Rating: 1984.63 -> 1989.55
Opponent Rating Round Result R. Change
Suzuki Rin 1938 3
loss
-18.12
Nakamura Souta   4
win
-
Tada Ayako 2148 5
win
+23.04
13 Kanto Renju Emperor Tournament 1st round
2012-10-21
Rating: 1971.72 -> 1984.63
Opponent Rating Round Result R. Change
Higuchi Fumiya   1
win
-
Mitsumori Masao 2250 2
win
+26.64
Tada Ayako 2139 3
loss
-8.81
Ishitani Shin-ichi 2267 4
loss
-4.92
50 Meijinsen Qualification East-Japan area 1st round
2012-06-03
Rating: 1985.19 -> 1971.72
Opponent Rating Round Result R. Change
Mitsumori Masao 2241 1
loss
-5.96
Iwano Fumio 2027 2
loss
-14.05
Ono Takayuki 2207 3
loss
-6.97
Maruta Hiroki 1930 4
win
+13.51
4th Tohoku Championship
2012-04-08
Rating: 1978.96 -> 1985.19
Opponent Rating Round Result R. Change
Nakamura Shigeru 2687 1
loss
-0.53
Maruta Hiroki 2000 2
win
+16.98
Kobayashi Koichi 2020 3
loss
-14.11
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: 1985.48 -> 1978.96
Opponent Rating Round Result R. Change
Kamiya Shunsuke 2222 1
loss
-6.53
49 Meijinsen Qualification East-Japan area 1st round
2011-06-12
Rating: 1991.35 -> 1985.48
Opponent Rating Round Result R. Change
Kamiya Shunsuke 2250 1
loss
-5.87
28th Kanto Championship
2011-05-22
Rating: 2032.97 -> 1991.35
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: 2018.44 -> 2032.97
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: 2031.01 -> 2018.44
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: 2049.16 -> 2031.01
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: 2021.77 -> 2049.16
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 -> 2021.77
Opponent Rating Round Result R. Change
Tanji Hiroki 1939 1
loss
-20.24
Tomobe Katsuhiro 1947 2
loss
-19.89
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: 2009.3 -> 2016
4th All Japan Championship
2009-03-20 -> 2009-03-21
Rating: 2026.39 -> 2009.3
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: 2049.77 -> 2026.39
Opponent Rating Round Result R. Change
Tamada Yoichi 2058 1
draw
+0.42
Tada Ayako   2
win
-
Ono Takayuki 2266 3
loss
-7.14
Nakayama Tomoharu 2035 4
loss
-16.66
25th Kanto Championship
2008-05-18
Rating: 2023.18 -> 2049.77
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
-7.07
3rd All Japan Championship
2008-03-22 -> 2008-03-23
Rating: 2092.39 -> 2023.18
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: 2096.37 -> 2092.39
Opponent Rating Round Result R. Change
Takeuchi Shunsuke   1
win
-
Yamashita Daisuke   2
win
-
Ishitani Shin-ichi 2200 3
loss
-11.33
Nakayama Tomoharu   4
loss
-
Matsuoka Teruo 1886 5
win
+7.35
45th Meijinsen Qualification East-Japan area 1st round
2007-06-17
Rating: 2089.15 -> 2096.37
Opponent Rating Round Result R. Change
Tanizaki Ryusuke 2094 1
win
+16.24
Isobe Taizan 2288 2
loss
-7.70
Iwano Fumio 2067 3
loss
-16.97
Hara Masao 2081 4
win
+15.64
7th Kanto Renju Emperor Tournament - 1st round
2006-10-15
Rating: 2103.35 -> 2089.15
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: 2159.95 -> 2103.35
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
-20.31
23rd Kanto Championship
2006-05-21
Rating: 2184.68 -> 2159.95
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
-22.61
1st All Japan Championship
2006-03-25 -> 2006-03-26
Rating: 2153.65 -> 2184.68
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: 2205.89 -> 2153.65
Opponent Rating Round Result R. Change
Iwano Fumio 1963 1
win
+6.36
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 -> 2205.89
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
-22.32
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: 2030
Top Rating: 2276

Country: Japan
City: Tokyo

Wins: 64
Losses: 86
Draws: 6
Gy1: 14
Gy2: 17
Gy5: 38
Hover the mouse over the opponent's name to see the personal score of Koji Maruta with this player.
Time: 0.015832901001 sec.