Koyama Hideo
Koyama Hideo (小山秀雄) has a rating of 1072. Their highest rating so far is 1288 (March 6, 2006).
Retired. The rating shown is the rating at retirement.
- 2022 record
- 0-7
- Record since 1927
- 34-148
- Win rate
- .187
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 |
|---|---|---|---|
| August 29, 2022 | Tsurumaru KeiichiRyusei Colors unknown | Loss | ↓9 |
| August 18, 2022 | Hoshiai ShihoTengen Colors unknown | Loss | ↓1 |
| May 12, 2022 | Kikuchi YoshioOza Colors unknown | Loss | ↓15 |
| April 7, 2022 | Ueno RisaGosei Colors unknown | Loss | ↓2 |
| February 21, 2022 | Toyoda HirohitoAgon Kiriyama Cup Colors unknown | Loss | ↓1 |
| January 24, 2022 | Yo KagenMeijin Colors unknown | Loss | ↓1 |
| January 10, 2022 | Fujisawa KazunariKisei First Tournament Preliminary Round 1 Colors unknown | Loss | ↓3 |
| October 11, 2021 | O YuininHoninbo Colors unknown | Loss | ↓9 |
| September 9, 2021 | Nakamura HidehitoJudan Colors unknown | Loss | ↓4 |
| July 8, 2021 | Nakazawa AyakoTengen Colors unknown | Loss | ↓9 |
| July 5, 2021 | Michael RedmondRyusei Colors unknown | Loss | ↓1 |
| July 5, 2021 | Tanimiya AyakoRyusei Colors unknown | Win | ↑12 |
| May 13, 2021 | Kin EnOza Colors unknown | Loss | ↓9 |
| April 22, 2021 | Nakajima MiekoMeijin Colors unknown | Loss | ↓10 |
| April 5, 2021 | Tei MeikoMeijin Colors unknown | Win | ↑13 |
| March 25, 2021 | Ishikura NoboruGosei Colors unknown | Loss | ↓3 |
| February 22, 2021 | Hamakado HibikiAgon Kiriyama Cup Colors unknown | Loss | ↓3 |
| January 21, 2021 | Awaji ShuzoJudan Colors unknown | Loss | ↓1 |
| January 14, 2021 | Kikuchi YoshioKisei First Tournament Preliminary Round 1 Colors unknown | Loss | ↓17 |
| October 8, 2020 | Fukui MasaakiHoninbo Colors unknown | Loss | ↓6 |
Head-to-head
| Opponent | Total | As Black | As White |
|---|---|---|---|
| Ohashi Hirofumi | 0-6.000 | 0-1 | 0-0 |
| Katsura Atsushi | 1-3.250 | 0-0 | 0-0 |
| Kudo Norio | 1-2.333 | 0-0 | 1-0 |
| Noguchi Hitoshi | 1-2.333 | 0-0 | 0-0 |
| Takabayashi Takuji | 1-2.333 | 0-0 | 0-0 |
| Pan Kunyu | 2-1.667 | 0-0 | 0-0 |
| Endo Yoshifumi | 1-2.333 | 0-0 | 0-0 |
| Ueda Takashi | 1-2.333 | 0-0 | 0-0 |
| Konagai Masaru | 1-2.333 | 0-0 | 0-0 |
| Kanno Naomi | 1-2.333 | 0-0 | 0-0 |
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 |
|---|---|---|
| 2022 | 0-7 | .000 |
| 2021 | 2-10 | .167 |
| 2020 | 1-6 | .143 |
| 2019 | 0-11 | .000 |
| 2018 | 1-9 | .100 |
| 2017 | 4-13 | .235 |
| 2016 | 7-8 | .467 |
| 2015 | 0-11 | .000 |
| 2014 | 0-2 | .000 |
| 2013 | 0-6 | .000 |
| 2012 | 2-6 | .250 |
| 2011 | 2-8 | .200 |
| 2009 | 0-1 | .000 |
| 2008 | 0-1 | .000 |
| 2006 | 0-4 | .000 |
| 2005 | 1-9 | .100 |
| 2004 | 6-10 | .375 |
| 2003 | 6-12 | .333 |
| 2002 | 2-6 | .250 |
| 1998 | 0-1 | .000 |
| 1995 | 0-1 | .000 |
| 1993 | 0-1 | .000 |
| 1992 | 0-1 | .000 |
| 1990 | 0-1 | .000 |
| 1983 | 0-1 | .000 |
| 1979 | 0-1 | .000 |
| 1976 | 0-1 | .000 |
| Total | 34-148 | .187 |
Calculated from games played between 1927 and 2026 (as of September 17, 2026).