Kosugi Masaru
Kosugi Masaru (小杉勝) has a rating of 1245. Their highest rating so far is 1290 (February 23, 2006).
Retired. The rating shown is the rating at retirement.
- 2011 record
- 0-2
- Record since 1927
- 22-68
- Win rate
- .244
Rating at retirement (not included in the rating list)
The rating is calculated from published game results. It does not include any adjustment for playing Black.
Professional ratingsFind a player
Rating history — professional
The “All” view starts at 2006; earlier years are used only to warm up the calculation and are not shown.
Recent games
| Date | Opponent and tournament | Result | Change |
|---|---|---|---|
| May 14, 2011 | Hashimoto YujiroJudan Colors unknown | Loss | ↓2 |
| May 6, 2011 | Nakajima MiekoOza Colors unknown | Loss | ↓14 |
| October 29, 2010 | Sato MasaharuMeijin Colors unknown | Loss | ↓4 |
| September 3, 2009 | Kurotaki MasakiHoninbo Colors unknown | Loss | ↓7 |
| May 19, 2006 | Inori YokoOza Colors unknown | Loss | ↓7 |
| April 6, 2006 | Ko IunGosei Colors unknown | Loss | ↓7 |
| March 30, 2006 | Oba JunyaTengen Colors unknown | Loss | ↓4 |
| February 23, 2006 | Shibusawa MachikoTengen Colors unknown | Win | ↑17 |
| February 20, 2006 | Kanno MasashiAgon Kiriyama Cup Colors unknown | Loss | ↓12 |
| October 13, 2005 | Inori YokoMeijin Colors unknown | Loss | ↓8 |
| September 22, 2005 | Yoshida YoichiHoninbo Colors unknown | Loss | ↓15 |
| August 31, 2005 | Ogawa TomokoHoninbo Colors unknown | Loss | ↓12 |
| August 25, 2005 | Kono YukioHoninbo Colors unknown | Win | ↑17 |
| June 30, 2005 | Kawamoto NoboruKisei Colors unknown | Loss | ↓12 |
| June 13, 2005 | Nobuta ShigehitoRyusei Colors unknown | Loss | ↓12 |
| May 26, 2005 | Ko MoseiGosei Colors unknown | Loss | ↓9 |
| April 21, 2005 | Kaku KyushinGosei Colors unknown | Win | ↑17 |
| March 17, 2005 | Takemiya YokoTengen Colors unknown | Loss | ↓5 |
| March 3, 2005 | Cho RiyuJudan Colors unknown | Loss | ↓3 |
| February 21, 2005 | Oki KeijiAgon Kiriyama Cup Colors unknown | Loss | ↓10 |
Head-to-head
| Opponent | Total | As Black | As White |
|---|---|---|---|
| Tsurumaru Keiichi | 1-2.333 | 0-0 | 0-0 |
| Takemiya Masaki | 0-3.000 | 0-0 | 0-3 |
| Ezura Yuichi | 1-2.333 | 1-1 | 0-0 |
| Inori Yoko | 0-3.000 | 0-0 | 0-0 |
| Fukui Susumu | 0-2.000 | 0-1 | 0-1 |
| Ohira Shuzo | 0-2.000 | 0-2 | 0-0 |
| Kanno Masashi | 1-1.500 | 0-0 | 0-0 |
| Kawai Tetsuyuki | 2-01.000 | 0-0 | 0-0 |
| Hiramoto Yasei | 2-01.000 | 0-0 | 0-0 |
| Sato Masaharu | 0-2.000 | 0-0 | 0-1 |
Record by year
Counted by calendar year, January to December (default wins and losses are included; jigo and no-result games are not). Only games from 1927 onward are counted, so these totals do not match the career records published by the two Ki-in.
| Year | Record | Win rate |
|---|---|---|
| 2011 | 0-2 | .000 |
| 2010 | 0-1 | .000 |
| 2009 | 0-1 | .000 |
| 2006 | 1-4 | .200 |
| 2005 | 2-9 | .182 |
| 2004 | 7-10 | .412 |
| 2003 | 4-8 | .333 |
| 2002 | 0-8 | .000 |
| 1997 | 0-1 | .000 |
| 1993 | 0-1 | .000 |
| 1992 | 0-1 | .000 |
| 1990 | 0-1 | .000 |
| 1988 | 0-1 | .000 |
| 1987 | 0-2 | .000 |
| 1986 | 0-1 | .000 |
| 1982 | 2-1 | .667 |
| 1980 | 0-2 | .000 |
| 1979 | 1-1 | .500 |
| 1978 | 2-6 | .250 |
| 1977 | 2-2 | .500 |
| 1976 | 0-1 | .000 |
| 1975 | 1-2 | .333 |
| 1973 | 0-1 | .000 |
| 1971 | 0-1 | .000 |
| Total | 22-68 | .244 |
Calculated from games played between 1927 and 2026 (as of September 17, 2026).