Ishii Mamoru
Ishii Mamoru (石井衛) has a rating of 1388.
Retired. The rating shown is the rating at retirement.
Ishii Mamoru石井衛Nihon Ki-in
Rating1388
Rank—
1-year change—
Peak rating—
Last 10WinLossWinLossLossLossLossLossLossLoss114-162
- 2004 record
- 0-5
- Record since 1927
- 114-162
- Win rate
- .413
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
Recent games
| Date | Opponent and tournament | Result | Change |
|---|---|---|---|
| August 9, 2004 | Takano HidekiOza Colors unknown | Loss | ↓4 |
| April 22, 2004 | Shibusawa MachikoJudan Colors unknown | Loss | ↓19 |
| April 8, 2004 | Ohashi HirofumiMeijin Colors unknown | Loss | ↓7 |
| March 11, 2004 | Koyama TerumiTengen Colors unknown | Loss | ↓18 |
| March 2, 2004 | Kamimura HaruoRyusei as Black | Loss | ↓6 |
| October 16, 2003 | Koyama ShizuoHoninbo Colors unknown | Loss | ↓19 |
| September 25, 2003 | Miyazawa GoroGosei Colors unknown | Loss | ↓8 |
| September 4, 2003 | Tozawa AkinobuGosei Colors unknown | Win | ↑22 |
| August 21, 2003 | Mizuma ToshifumiKisei Colors unknown | Loss | ↓12 |
| August 14, 2003 | Kono MitsukiGosei Colors unknown | Win | ↑27 |
| August 7, 2003 | Katsura AtsushiJudan Colors unknown | Loss | ↓14 |
| June 19, 2003 | Han ZenkiTengen Colors unknown | Loss | ↓8 |
| June 2, 2003 | Koyama TerumiRyusei Colors unknown | Win | ↑16 |
| May 8, 2003 | Muramatsu RyuichiOza 2nd Preliminary Round 1 Colors unknown | Loss | ↓14 |
| February 20, 2003 | Sato MasaharuMeijin 2nd Preliminary Round 1 Colors unknown | Loss | ↓12 |
| February 4, 2003 | Kono RinRyusei as White | Loss | ↓5 |
| December 12, 2002 | Han ZenkiJudan 2nd Preliminary Semifinal Colors unknown | Loss | ↓11 |
| November 7, 2002 | Fukui MasaakiHoninbo 2nd Preliminary Round 1 Colors unknown | Loss | ↓17 |
| October 3, 2002 | Hisajima KunioKisei Preliminary Round 1 Colors unknown | Loss | ↓13 |
| September 12, 2002 | Kitamura HiroshiJudan 2nd Preliminary Round 2 Colors unknown | Win | ↑12 |
Head-to-head
| Opponent | Total | As Black | As White |
|---|---|---|---|
| Kojima Takaho | 4-3.571 | 1-2 | 2-1 |
| Nakagawa Shinji | 1-6.143 | 1-0 | 0-6 |
| Kageyama Toshiro | 5-2.714 | 3-2 | 2-0 |
| Yamazaki Masuo | 5-1.833 | 3-0 | 2-1 |
| Hoshino Toshi | 2-4.333 | 2-0 | 0-4 |
| Kato Masao | 0-5.000 | 0-4 | 0-1 |
| Kaji Kazutame | 3-2.600 | 2-1 | 1-1 |
| Sugiuchi Kazuko | 4-1.800 | 3-1 | 1-0 |
| Tozawa Akinobu | 3-2.600 | 0-1 | 2-1 |
| Kuwahara Munehisa | 2-3.400 | 2-3 | 0-0 |
| Chino Tadahiko | 1-4.200 | 0-3 | 1-1 |
| Kodama Kunio | 4-1.800 | 2-0 | 2-1 |
| Sato Masaharu | 1-4.200 | 1-0 | 0-2 |
| Hayashi Yutaro | 3-2.600 | 1-1 | 2-1 |
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 |
|---|---|---|
| 2004 | 0-5 | .000 |
| 2003 | 3-8 | .273 |
| 2002 | 4-7 | .364 |
| 2001 | 0-1 | .000 |
| 1999 | 0-1 | .000 |
| 1998 | 0-1 | .000 |
| 1996 | 0-1 | .000 |
| 1995 | 0-1 | .000 |
| 1994 | 0-1 | .000 |
| 1993 | 0-1 | .000 |
| 1992 | 1-2 | .333 |
| 1991 | 0-1 | .000 |
| 1990 | 0-1 | .000 |
| 1989 | 0-1 | .000 |
| 1987 | 1-1 | .500 |
| 1986 | 0-3 | .000 |
| 1985 | 0-1 | .000 |
| 1982 | 2-1 | .667 |
| 1981 | 0-2 | .000 |
| 1980 | 1-2 | .333 |
| 1979 | 4-3 | .571 |
| 1978 | 1-1 | .500 |
| 1977 | 4-2 | .667 |
| 1976 | 7-5 | .583 |
| 1975 | 5-3 | .625 |
| 1974 | 4-9 | .308 |
| 1973 | 5-6 | .455 |
| 1972 | 5-7 | .417 |
| 1971 | 5-9 | .357 |
| 1970 | 11-7 | .611 |
| 1969 | 4-4 | .500 |
| 1968 | 3-10 | .231 |
| 1967 | 12-6 | .667 |
| 1966 | 5-7 | .417 |
| 1965 | 6-7 | .462 |
| 1964 | 6-6 | .500 |
| 1963 | 4-9 | .308 |
| 1962 | 3-5 | .375 |
| 1961 | 3-9 | .250 |
| 1960 | 5-5 | .500 |
| Total | 114-162 | .413 |
Calculated from games played between 1927 and 2026 (as of September 17, 2026).