Maruta Koji (丸田光治)

Place: Tokyo, Japan

Rating: 2163.05, Std: 99.13, Rank: 502

First game: 1996-03-01, Last game: 2024-07-21

Top rating: 2230.02 (2003-11-16)

Games: 250, Wins: 98, Draws: 8, Losses: 144

Gy1: 13, Gy2: 25, Gy5: 56

41st Kanto Championship
Date	2024-07-21		Rating	2163.05
Round	Color	Result	Opponent
2	White	Win	Suzuki Yoshitaka	1979.58
3	White	Loss	Matsuda Shoma	2433.73
4	White	Loss	Takazawa Nagayoshi	2227.28
5	White	Win	Li Haoyang	2055.61
6	White	Loss	Tanaka Shotaro	2281.69
18th All Japan Championship
Date	2024-02-12		Rating	2168.56
Round	Color	Result	Opponent
1	White	Loss	Fujita Maiko	2375.23
2	Black	Win	Jang Eun Min	2323.94
3	White	Win	Ishitani Shin-ichi	2393.89
4	White	Loss	Park Woong-bae	2345.17
5	White	Win	Tanaka Shotaro	2291.26
6	White	Loss	Lee Ho June	2445.57
24 Kanto Renju Emperor Tournament Kanto area 1st round
Date	2023-11-19		Rating	2157.36
Round	Color	Result	Opponent
3	White	Loss	Tanaka Shotaro	2293.88
4	Black	Loss	Yoshikawa Tomoki	2124.67
40th Kanto Championship
Date	2023-07-09		Rating	2152.52
Round	Color	Result	Opponent
1	Black	Loss	Tanaka Shotaro	2302.03
4	White	Win	Suzuki Yoshitaka	1961.16
17th All Japan Championship
Date	2023-03-19		Rating	2149.05
Round	Color	Result	Opponent
5	White	Loss	Matsuda Shoma	2346.99
6	White	Loss	Takazawa Nagayoshi	2273.31
23 Kanto Renju Emperor Tournament 2nd round
Date	2023-01-29		Rating	2150.63
Round	Color	Result	Opponent
1	Black	Loss	Kamiya Shunsuke	2838.70
2	White	Loss	Fujita Maiko	2399.82
3	White	Loss	Yokoyama Shota	2444.67
4	White	Loss	Inoue Fumiya	2510.70
5	White	Loss	Okabe Hiroshi	2673.29
23 Renju Emperor Tournament Kanto area 1st round
Date	2022-11-06		Rating	2158.26
Round	Color	Result	Opponent
2	White	Win	Kasahara Reiko	1677.84
3	White	Win	Tomobe Katsuhiro	2073.51
4	Black	Win	Tanaka Shotaro	2306.95
39 Kanto Championship
Date	2022-07-31		Rating	2154.72
Round	Color	Result	Opponent
2	White	Win	Li Haoyang	1987.18
3	White	Loss	Ishitani Shin-ichi	2344.84
Special Tournament
Date	2022-04-10		Rating	2150.37
Round	Color	Result	Opponent
1	White	Loss	Fujita Maiko	2395.33
2	White	Loss	Inoue Fumiya	2496.37
3	White	Win	Maruta Hiroki	2202.93
38 Kanto Championship
Date	2021-08-08		Rating	2133.81
Round	Color	Result	Opponent
1	White	Loss	Inoue Fumiya	2491.18
2	White	Win	Kobayashi Nanako	2003.55
3	White	Win	Fujita Maiko	2339.61
16th All Japan Championship
Date	2021-03-28		Rating	2110.44
Round	Color	Result	Opponent
1	White	Loss	Makino Mitsunori	2555.22
2	White	Loss	Ishitani Shin-ichi	2338.99
3	White	Loss	Yoshimoto Yuta	2225.51
4	White	Loss	Kawaai Hitoshi	2001.33
5	White	Loss	Suenaga Daiki	2252.95
6	Black	Win	Maruta Hiroki	2219.02
24th New Year(Mikami)Cup
Date	2021-01-29		Rating	2106.24
Round	Color	Result	Opponent
S1	Black	Win	Maruta Hiroki	2217.74
S2	White	Loss	Makino Mitsunori	2549.11
S3	White	Loss	Okabe Hiroshi	2723.32
S4	Black	Loss	Ono Takayuki	2379.46
S5	White	Loss	Ishitani Shin-ichi	2354.86
21 Renju Emperor Tournament Kanto area 1st round
Date	2020-11-15		Rating	2099.22
Round	Color	Result	Opponent
1	White	Loss	Kawaai Hitoshi	2002.00
2	White	Loss	Suenaga Daiki	2258.88
3	White	Loss	Shimura Hiroki	1984.14
4	White	Win	Kasahara Reiko	1687.54
37 Kanto Championship
Date	2020-08-10		Rating	2106.26
Round	Color	Result	Opponent
3	White	Win	Okada Akihiro	1915.42
5	Black	Loss	Kato Yasuhiro	2070.84
6	Black	Win	Shimura Hiroki	1951.76
58 Meijinsen Qualification Kanto area 1st round
Date	2020-06-21		Rating	2109.95
Round	Color	Result	Opponent
1	White	Loss	Fujita Maiko	2360.60
2	White	Win	Ito Midori	1775.25
20 Renju Emperor Tournament Kanto area 1st round
Date	2019-11-10		Rating	2128.05
Round	Color	Result	Opponent
2	White	Win	Shibata Satoru	1815.01
3	White	Loss	Ishitani Shin-ichi	2367.56
4	White	Win	Tomobe Katsuhiro	2119.67
36 Kanto Championship
Date	2019-07-28		Rating	2131.54
Round	Color	Result	Opponent
5	White	Win	Shibata Satoru	1810.85
6	White	Loss	Miyamoto Syunju	2282.49
57 Meijinsen Qualification East Japan area 2nd round
Date	2019-06-23		Rating	2133.32
Round	Color	Result	Opponent
1	White	Loss	Kusajima Masato	2254.14
2	White	Loss	Koyama Jun	2600.51
3	Black	Win	Maruta Hiroki	2178.29
4	White	Loss	Ono Takayuki	2390.95
5	White	Draw	Inoue Fumiya	2418.03
57 Meijinsen Qualification Kanto area 1st round
Date	2019-05-12		Rating	2133.96
Round	Color	Result	Opponent
1	White	Win	Inoue Fumiya	2418.74
2	White	Win	Maruta Hiroki	2180.99
3	White	Loss	Ono Takayuki	2393.71
4	Black	Loss	Mitsumori Masao	2310.16
13 Middle-dan Players Tournament
Date	2018-08-12		Rating	2109.16
Round	Color	Result	Opponent
1	White	Loss	Kusajima Masato	2301.58
2	White	Loss	Miyamoto Syunju	2261.56
4	White	Loss	Kusajima Masato	2301.58
5	White	Loss	Miyamoto Syunju	2261.56
35 Kanto Championship
Date	2018-07-16		Rating	2109.96
Round	Color	Result	Opponent
1	Black	Loss	Nakayama Tomoharu	2830.88
56 Meijinsen Qualification Kanto area 1st round
Date	2018-05-13		Rating	2111.96
Round	Color	Result	Opponent
1	White	Loss	Sato Kiyotomi	2437.35
18 Kanto Renju Emperor Tournament 1st round
Date	2017-11-01		Rating	2120.86
Round	Color	Result	Opponent
1	White	Loss	Okabe Hiroshi	2716.02
2	Black	Win	Koyama Akihiro	1959.58
3	White	Loss	Ishitani Shin-ichi	2389.47
4	White	Loss	Maruta Hiroki	2137.61
34 Kanto Championship
Date	2017-07-16		Rating	2130.64
Round	Color	Result	Opponent
1	White	Win	Matsumoto Hiro	1724.26
2	Black	Loss	Ishitani Shin-ichi	2388.71
3	White	Loss	Ishima Ryoma	2158.59
12th All Japan Championship
Date	2017-03-26		Rating	2147.71
Round	Color	Result	Opponent
1	White	Draw	Iio Yoshihiro	2542.21
2	White	Loss	Tachi Masaya	2526.22
3	Black	Draw	Nishida Toshio	2085.74
4	Black	Loss	Ono Takayuki	2362.78
5	White	Win	Sakamoto Suzan	2266.62
6	White	Loss	Fujita Yudai	2483.51
17 Kanto Renju Emperor Tournament 2nd round
Date	2016-12-10		Rating	2157.61
Round	Color	Result	Opponent
1	Black	Loss	Nakayama Tomoharu	2779.34
2	White	Loss	Okabe Hiroshi	2710.90
3	Black	Loss	Sato Kiyotomi	2497.71
4	White	Loss	Ishitani Shin-ichi	2394.88
5	White	Loss	Nakamura Shigeru	2954.88
17 Kanto Renju Emperor Tournament 1st round
Date	2016-11-23		Rating	2159.97
Round	Color	Result	Opponent
1	White	Loss	Okabe Hiroshi	2709.60
2	Black	Win	Demachi Koichiro	1928.47
3	White	Loss	Sato Kiyotomi	2498.83
4	White	Win	Maruta Hiroki	2113.88
ex1	Black	Loss	Iwano Fumio	2265.19
33 Kanto Championship
Date	2016-07-31		Rating	2174.28
Round	Color	Result	Opponent
1	White	Win	Cho Enkun	1649.86
2	Black	Loss	Okabe Hiroshi	2718.42
3	White	Win	Kato Yasuhiro	2038.57
54 Meijinsen Qualification Kanto area 1st round
Date	2016-05-22		Rating	2180.52
Round	Color	Result	Opponent
2	Black	Loss	Sato Kiyotomi	2517.13
3	White	Win	Iwano Fumio	2238.15
4	Black	Loss	Mitsumori Masao	2351.00
11th All Japan Championship
Date	2016-01-11		Rating	2189.58
Round	Color	Result	Opponent
1	Black	Loss	Kamiya Shunsuke	2718.99
2	Black	Draw	Chigira Makoto	2025.66
3	White	Loss	Fujita Yudai	2443.56
5	White	Win	Kato Yasuhiro	2033.95
6	White	Win	Suzuki Rin	1920.40
Kanto Championship
Date	2015-07-20		Rating	2201.37
Round	Color	Result	Opponent
1	White	Loss	Nakayama Tomoharu	2760.14
4	White	Win	Hashimoto Takuya	2008.42
5	Black	Win	Kato Yasuhiro	2050.43
6	White	Win	Fujikawa Masaki	2103.43
10th All Japan Championship
Date	2015-03-29		Rating	2198.09
Round	Color	Result	Opponent
1	White	Loss	Kamiya Shunsuke	2672.35
2	White	Win	Fujikawa Masaki	2089.97
31th Kanto Championship
Date	2014-05-11		Rating	2178.45
Round	Color	Result	Opponent
2	White	Loss	Tamura Kazumasa	2519.74
3	White	Loss	Tomobe Katsuhiro	2109.41
4	White	Win	Maruta Hiroki	2100.31
11th Middle-dan players Tournament
Date	2013-08-17		Rating	2172.00
Round	Color	Result	Opponent
1	White	Loss	Kashihara Akihiko	2337.99
2	Black	Loss	Kato Yasuhiro	2130.72
3	White	Win	Maruta Hiroki	2134.12
4	White	Win	Kubo Izumi	2090.45
5	Black	Win	Miyagawa Junzo	2216.33
6	White	Loss	Nakayama Tomoharu	2648.32
51 Meijinsen Qualification East-Japan area 1st round
Date	2013-06-16		Rating	2167.08
Round	Color	Result	Opponent
1	White	Loss	Isobe Taizan	2390.00
29th Kanto Championship
Date	2013-05-12		Rating	2165.15
Round	Color	Result	Opponent
3	Black	Loss	Suzuki Rin	2046.57
4	White	Win	Nakamura Souta	2074.41
5	White	Win	Tada Ayako	2286.64
13 Kanto Renju Emperor Tournament 1st round
Date	2012-10-21		Rating	2145.46
Round	Color	Result	Opponent
1	White	Win	Higuchi Fumiya	1603.23
2	Black	Win	Mitsumori Masao	2344.86
3	White	Loss	Tada Ayako	2302.75
4	White	Loss	Ishitani Shin-ichi	2357.68
50 Meijinsen Qualification East-Japan area 1st round
Date	2012-06-03		Rating	2127.43
Round	Color	Result	Opponent
1	White	Loss	Mitsumori Masao	2362.24
2	White	Loss	Iwano Fumio	2131.12
3	White	Loss	Ono Takayuki	2428.27
4	Black	Win	Maruta Hiroki	2090.81
4th Tohoku Championship
Date	2012-04-08		Rating	2122.73
Round	Color	Result	Opponent
1	Black	Loss	Nakamura Shigeru	2878.93
2	White	Win	Maruta Hiroki	2083.22
3	White	Loss	Kobayashi Koichi	2221.86
4	White	Loss	Kusajima Masato	2179.91
5	White	Win	Hirono Masakazu	1996.65
12 Kanto Renju Emperor Tournament 1st round
Date	2011-10-23		Rating	2109.06
Round	Color	Result	Opponent
1	White	Loss	Kamiya Shunsuke	2439.89
49 Meijinsen Qualification East-Japan area 1st round
Date	2011-06-12		Rating	2100.14
Round	Color	Result	Opponent
1	White	Loss	Kamiya Shunsuke	2417.12
28th Kanto Championship
Date	2011-05-22		Rating	2099.06
Round	Color	Result	Opponent
1	White	Loss	Nakayama Tomoharu	2544.49
2	White	Loss	Arai Kazumi	2369.69
3	White	Loss	Suzuki Rin	1989.30
4	White	Win	Maruta Hiroki	2108.53
5	White	Loss	Fujikawa Masaki	2099.05
11 Kanto Renju Emperor Tournament 1st round
Date	2010-10-31		Rating	2108.54
Round	Color	Result	Opponent
1	Black	Win	Kato Yasuhiro	2066.85
2	White	Loss	Okabe Hiroshi	2694.45
Meijinsen Qualification East-Japan area 1st round
Date	2010-06-27		Rating	2108.73
Round	Color	Result	Opponent
1	White	Loss	Fukui Nobuhiro	2318.78
2	White	Win	Arai Kazumi	2315.54
3	White	Loss	Kudomi Takahiro	2395.75
4	Black	Loss	Tada Ayako	2192.14
27th Kanto Championship
Date	2010-05-23		Rating	2108.80
Round	Color	Result	Opponent
1	Black	Loss	Nakamura Shigeru	2856.12
2	White	Loss	Tomobe Katsuhiro	2206.66
5th All Japan Championship
Date	2010-03-21		Rating	2111.57
Round	Color	Result	Opponent
4	Black	Win	Kusajima Masato	2167.07
10 Kanto Renju Emperor Tournament 1st round
Date	2009-10-04		Rating	2108.14
Round	Color	Result	Opponent
1	White	Loss	Tanji Hiroki	2051.68
2	White	Loss	Tomobe Katsuhiro	2151.90
3	White	Win	Tanizaki Ryusuke	2102.79
4	Black	Win	Fujikawa Masaki	2048.56
26th Kanto Championship
Date	2009-05-17		Rating	2107.00
Round	Color	Result	Opponent
4	Black	Win	Matsuoka Teruo	1907.58
5	Black	Win	Kato Yasuhiro	2023.05
4th All Japan Championship
Date	2009-03-21		Rating	2102.59
Round	Color	Result	Opponent
4	White	Win	Suzuki Rin	1950.99
5	Black	Loss	Tanizaki Ryusuke	2124.48
6	Black	Loss	Nagao Noriaki	2270.65
9th Kanto Renju Emperor Tournament, 1st round
Date	2008-10-26		Rating	2098.60
Round	Color	Result	Opponent
1	White	Draw	Tamada Yoichi	2267.13
2	White	Win	Tada Ayako	2004.76
3	White	Loss	Ono Takayuki	2408.22
4	White	Loss	Nakayama Tomoharu	2284.10
25th Kanto Championship
Date	2008-05-18		Rating	2090.73
Round	Color	Result	Opponent
3	White	Win	Tanizaki Ryusuke	2119.32
4	Black	Win	Kobayashi Koichi	2097.02
5	Black	Loss	Kudomi Takahiro	2335.54
3rd All Japan Championship
Date	2008-03-23		Rating	2082.68
Round	Color	Result	Opponent
1	White	Loss	Yamaguchi Yusui	2611.42
2	White	Loss	Kato Yasuhiro	1984.42
3	White	Loss	Tadokoro Hosai	1925.21
4	White	Loss	Fujikawa Masaki	2105.09
5	White	Loss	Nakayama Tomoharu	2229.69
6	White	Draw	Tanizaki Ryusuke	2120.08
8 Kanto Renju Emperor Tournament 1st round
Date	2007-10-21		Rating	2096.64
Round	Color	Result	Opponent
1	White	Win	Takeuchi Shunsuke	1936.08
2	White	Win	Yamashita Daisuke	1902.32
3	White	Loss	Ishitani Shin-ichi	2397.57
4	White	Loss	Nakayama Tomoharu	2201.47
5	Black	Win	Matsuoka Teruo	1871.20
45th Meijinsen Qualification East-Japan area 1st round
Date	2007-06-17		Rating	2104.70
Round	Color	Result	Opponent
1	Black	Win	Tanizaki Ryusuke	2136.28
2	Black	Loss	Isobe Taizan	2431.95
3	White	Loss	Iwano Fumio	2163.27
4	White	Win	Hara Masao	2052.41
7th Kanto Renju Emperor Tournament - 1st round
Date	2006-10-15		Rating	2108.86
Round	Color	Result	Opponent
1	Black	Win	Matsuoka Teruo	1855.26
2	White	Loss	Maruta Hiroki	2008.35
3	Black	Win	Fujikawa Masaki	2053.63
4	Black	Loss	Hara Masao	2091.01
5	Black	Win	Tanizaki Ryusuke	2126.69
Meijin-sen Qual, East Japan area 1st round
Date	2006-06-18		Rating	2111.30
Round	Color	Result	Opponent
1	White	Loss	Koyama Jun	2337.16
2	Black	Loss	Arita Nobuyoshi	2367.24
3	White	Loss	Ono Takayuki	2299.75
4	Black	Loss	Hara Masao	2082.45
23rd Kanto Championship
Date	2006-05-21		Rating	2115.59
Round	Color	Result	Opponent
1	White	Win	Iwano Fumio	2093.91
2	Black	Loss	Mitsumori Masao	2257.17
3	Black	Win	Tadokoro Hosai	1933.35
4	Black	Loss	Nakamura Shigeru	2845.03
5	White	Loss	Hara Masao	2081.94
1st All Japan Championship
Date	2006-03-26		Rating	2125.04
Round	Color	Result	Opponent
4	White	Win	Tadokoro Hosai	1929.36
5	Black	Win	Kato Yasuhiro	2053.36
6	White	Win	Tomobe Katsuhiro	2089.24
6th Kanto Renju Emperor Tournament - 1st round
Date	2005-10-22		Rating	2132.43
Round	Color	Result	Opponent
1	Black	Win	Iwano Fumio	2069.99
2	White	Loss	Itami Yoshiyuki	2180.89
3	Black	Loss	Tomobe Katsuhiro	2079.24
4	White	Loss	Arita Nobuyoshi	2345.21
43rd Meijinsen Qualification: East Japan 1st round
Date	2005-06-12		Rating	2150.78
Round	Color	Result	Opponent
1	White	Loss	Koyama Jun	2277.84
2	White	Win	Tanno Yoshitaka	2092.56
3	White	Loss	Nagao Noriaki	2228.44
4	Black	Loss	Itami Yoshiyuki	2188.14
22nd Kanto Championship
Date	2005-05-22		Rating	2155.43
Round	Color	Result	Opponent
1	White	Win	Ishizaki Masatoshi	1914.53
2	Black	Loss	Kawamura Norihiko	2690.87
3	Black	Win	Sasaki Miyu	1963.97
4	White	Win	Koyama Jun	2275.12
5	White	Loss	Ishitani Shin-ichi	2396.15
Japan WC Qualification tournament
Date	2005-04-03		Rating	2161.55
Round	Color	Result	Opponent
4	White	Win	Tanizaki Ryusuke	2072.99
5	Black	Win	Kato Yasuhiro	2023.76
6	White	Loss	Kubo Izumi	2169.26
5th Kanto Renju Emperor Tournament - 1st round
Date	2004-11-28		Rating	2174.53
Round	Color	Result	Opponent
1	Black	Loss	Sato Koichi	2010.90
2	White	Win	Sasaki Miyu	1954.39
3	Black	Win	Maruta Hiroki	1957.11
4	White	Win	Matsuoka Teruo	1886.44
42nd Meijinsen Qualification: East Japan 1st round
Date	2004-06-13		Rating	2194.01
Round	Color	Result	Opponent
4	Black	Loss	Sano Hiroyuki	2164.71
4th Kanto Renju Emperor Tournament - 2nd round
Date	2003-11-30		Rating	2228.55
Round	Color	Result	Opponent
	White	Win	Nagao Noriaki	2280.73
	White	Win	Mitsumori Masao	2265.93
	Black	Loss	Isobe Taizan	2422.83
	Black	Loss	Yamaguchi Yusui	2593.47
	Black	Loss	Okabe Hiroshi	2557.73
4th Kanto Renju Emperor Tournament - 1st round
Date	2003-11-16		Rating	2230.02
Round	Color	Result	Opponent
1	Black	Win	Yamauchi Yasuhiro	1804.67
2	White	Win	Nagao Noriaki	2284.31
3	White	Draw	Yamaguchi Yusui	2591.74
4	White	Win	Kubo Izumi	2218.28
41th Meijinsen Qualification: East Japan 1st round
Date	2003-06-08		Rating	2219.55
Round	Color	Result	Opponent
1	White	Loss	Sano Hiroyuki	2209.27
2	White	Win	Mitsumori Masao	2292.06
3	White	Loss	Sato Kiyotomi	2298.08
4	Black	Draw	Kubo Izumi	2224.26
40th Meijinsen Qualification: East Japan 1st round
Date	2002-06-02		Rating	2207.55
Round	Color	Result	Opponent
1	White	Loss	Isobe Taizan	2448.06
2	Black	Loss	Kato Yasuhiro	2097.78
3	White	Win	Ohno Syunzo	1994.59
4	Black	Win	Sato Takuma	2069.11
38th Meijinsen Qualification: East Japan 1st round
Date	2000-06-04		Rating	2209.53
Round	Color	Result	Opponent
1	Black	Win	Sunagawa Shouki	2211.51
2	White	Win	Mitsumori Masao	2293.17
3	White	Loss	Kudomi Takahiro	2354.12
4	White	Loss	Isobe Taizan	2454.56
Kanto Championship
Date	2000-05-14		Rating	2208.14
Round	Color	Result	Opponent
1	White	Loss	Nakamura Shigeru	2760.93
2	White	Loss	Hara Masao	2120.34
3	Black	Win	Tadokoro Hosai	1972.50
4	Black	Win	Kato Yasuhiro	2054.25
36 Suiseisen Tournament 1st round
Date	1996-03-01		Rating	2134.75
Round	Color	Result	Opponent
4	White	Win	Tanuma Akira	1844.52