Sato Machiko
Sato Machiko (佐藤真知子) has a rating of 1170. Their highest rating so far is 1289 (October 15, 2009).
Retired. The rating shown is the rating at retirement.
- 2016 record
- 0-1
- Record since 1927
- 13-76
- Win rate
- .146
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.
Rating history in the women's tournaments pool (for reference)
The “All” view starts at 2006; earlier years are used only to warm up the calculation and are not shown.
Ratings in other pools
Ratings for general play and for women's tournaments are calculated independently and do not affect each other.
- Women's tournaments: 1237 Rating at retirement (not included in the rating list)
Recent games
| Date | Opponent and tournament | Result | Change |
|---|---|---|---|
| March 12, 2016 | Kanno NaomiWomen's Meijin Colors unknown | Loss | ↓10 |
| December 18, 2015 | Mizuma ToshifumiKisei First Tournament Preliminary Round 1 Colors unknown | Loss | ↓3 |
| November 27, 2015 | Suzuki IsaoMeijin Colors unknown | Loss | ↓6 |
| October 16, 2015 | Hashimoto YujiroJudan Colors unknown | Loss | ↓3 |
| May 22, 2015 | Sakai TakeshiOza Colors unknown | Loss | ↓2 |
| February 19, 2015 | Koyama KuyaHoninbo Colors unknown | Loss | ↓3 |
| February 16, 2015 | 松多洋一郎Agon Kiriyama Cup Preliminary C as Black | Win | ↑25 |
| February 6, 2015 | Nagashima KozueMeijin Colors unknown | Loss | ↓8 |
| December 11, 2014 | Kobayashi IzumiWomen's Honinbo Colors unknown | Loss | ↓2 |
| December 4, 2014 | Endo YoshifumiGosei Colors unknown | Loss | ↓3 |
| July 7, 2014 | Osawa NarumiWomen's Kisei Colors unknown | Loss | ↓3 |
| June 27, 2014 | Sakai MakiOza Colors unknown | Loss | ↓3 |
| May 23, 2014 | Takamizawa TadaoOza Colors unknown | Win | ↑22 |
| April 18, 2014 | O YuininMeijin Colors unknown | Loss | ↓7 |
| February 17, 2014 | 片山浩之Agon Kiriyama Cup Preliminary C as Black | Loss | ↓9 |
| December 26, 2013 | Fukui MasaakiGosei Colors unknown | Loss | ↓4 |
| December 19, 2013 | Aoba KaoriWomen's Honinbo Colors unknown | Loss | ↓8 |
| November 21, 2013 | Fujisawa KazunariHoninbo Colors unknown | Loss | ↓5 |
| July 18, 2013 | Cho ChienWomen's Kisei Colors unknown | Loss | ↓5 |
| May 17, 2013 | Hagiya KazuhiroOza Colors unknown | Loss | ↓14 |
Head-to-head
| Opponent | Total | As Black | As White |
|---|---|---|---|
| Ito Tomoe | 1-4.200 | 1-2 | 0-2 |
| Kusunoki Teruko | 0-5.000 | 0-2 | 0-2 |
| Kanno Naomi | 0-5.000 | 0-1 | 0-0 |
| O Yuinin | 0-4.000 | 0-0 | 0-0 |
| Kin En | 0-4.000 | 0-1 | 0-0 |
| Ogawa Tomoko | 1-3.250 | 0-0 | 1-1 |
| Sugiuchi Kazuko | 0-3.000 | 0-1 | 0-1 |
| Umezawa Yukari | 0-3.000 | 0-0 | 0-0 |
| Kobayashi Chizu | 1-2.333 | 1-1 | 0-0 |
| Suzuki Tsuna | 1-2.333 | 0-1 | 1-1 |
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 |
|---|---|---|
| 2016 | 0-1 | .000 |
| 2015 | 1-6 | .143 |
| 2014 | 1-6 | .143 |
| 2013 | 0-8 | .000 |
| 2012 | 1-9 | .100 |
| 2011 | 1-9 | .100 |
| 2010 | 0-1 | .000 |
| 2009 | 1-1 | .500 |
| 2006 | 1-5 | .167 |
| 2005 | 2-12 | .143 |
| 2004 | 1-11 | .083 |
| 2003 | 1-12 | .077 |
| 2002 | 0-7 | .000 |
| 2001 | 0-1 | .000 |
| 2000 | 0-1 | .000 |
| 1998 | 0-1 | .000 |
| 1994 | 0-2 | .000 |
| 1993 | 0-2 | .000 |
| 1992 | 1-0 | 1.000 |
| 1982 | 0-1 | .000 |
| 1981 | 1-3 | .250 |
| 1980 | 2-0 | 1.000 |
| 1979 | 1-1 | .500 |
| 1978 | 1-3 | .250 |
| 1977 | 3-8 | .273 |
| 1976 | 0-1 | .000 |
| 1975 | 0-2 | .000 |
| 1973 | 0-2 | .000 |
| 1972 | 1-1 | .500 |
| 1971 | 2-1 | .667 |
| 1969 | 0-1 | .000 |
| 1967 | 0-1 | .000 |
| 1965 | 0-1 | .000 |
| Total | 13-76 | .146 |
Calculated from games played between 1927 and 2026 (as of September 17, 2026).