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Idaho State Champions 1947-Present
It is the "Closed Winner" each year that officially receives the title, "Idaho State Champion".
In 1947-1957 and 1968-1969, only the Idaho Invitational or Idaho Open tournament was held. The top placing Idaho resident was considered the Closed winner. Separate Idaho Closed and Idaho Open tournaments were held from 1958-1967 and from 1970-today. Except that some years during that interval didn't have an Idaho Open tournament.
The Idaho Closed title was shared in 1951. From 1952-1976 the title was given on tie breaks. From 1977 to today the title is once again shared among the tied players.
Material for this list was provided by the Idaho Chess History (ICH) project. Pre-1947 Idaho State Championships were held, but not under ICA administration.
| Year | Closed Winner | City | Open Winner | City |
| 1947 | Charles H. Stewart | Boise, ID | | |
| 1948 | Mel Schubert | Pocatello, ID | William F. Taber | Reno, NV |
| 1949 | Charles H. Stewart | Boise, ID | | |
| 1950 | LaVerl Kimpton | Filer, ID | William F. Taber | Reno, NV |
| 1951 | Glen Buckendorf | Buhl, ID | Herman Dittman | Salt Lake City, UT |
| (tie) | LaVerl Kimpton | Filer, ID | | |
| 1952 | LaVerl Kimpton | Filer, ID | | |
| 1953 | LaVerl Kimpton | Filer, ID | Oscar W. Manney | Seattle, WA |
| 1954 | Glen Buckendorf | Buhl, ID | Maurice Gedance | Las Vegas, NV |
| 1955 | Dick Vandenburg | Boise, ID | William F. Taber | Reno, NV |
| 1956 | Glen Buckendorf | Buhl, ID | | |
| 1957 | Glen Buckendorf | Buhl, ID | Kenneth R. Jones | Reno, NV |
| 1958 | Dick Vandenburg | Boise, ID | Dr. Peter Lapiken | Missoula, MT |
| 1959 | Glen Buckendorf | Buhl, ID | Gaston Chappuis | Salt Lake City, UT |
| 1960 | Glen Buckendorf | Buhl, ID | Michael Frannett | Seattle, WA |
| 1961 | George Krauss Jr. | Mtn. Home AFB | Gaston Chappuis | Salt Lake City, UT |
| 1962 | George Krauss Jr. | Mtn. Home AFB | Donald Turner | The Dalles, OR |
| 1963 | Dick Vandenburg | Boise, ID | Donald Turner | The Dalles, OR |
| 1964 | Dick Vandenburg | Boise, ID | Gaston Chappuis | Salt Lake City, UT |
| 1965 | Dick Vandenburg | Boise, ID | Dick Vandenburg | Boise, ID |
| 1966 | Bert Germalm | Blackfoot, ID | Gaston Chappuis | Salt Lake City, UT |
| 1967 | Glen Buckendorf | Buhl, ID | Robert Mitchell | Klamath Falls, OR |
| 1968 | Glen Buckendorf | Buhl, ID | Sief Poulson | Salem, OR |
| 1969 | Wolfgang Freese | Pocatello, ID | Wolfgang Freese | Pocatello, ID |
| 1970 | Rex Wilcox | Pocatello, ID | Mitch Montchalin | Happy Valley, OR |
| 1971 | David Reynods | Pocatello, ID | Glen Buckendorf | Buhl, ID |
| 1972 | Glen Buckendorf | Buhl, ID | Donald Arnow | Salt Lake City, UT |
| 1973 | Harold Moye | Kimberly, ID | Sam Barr | Seattle, WA |
| 1974 | Kenneth Sanderson | Boise, ID | Leo Stefurak | Seattle, WA |
| 1975 | Gregory T. Perryman | Boise, ID | Robert Stephenson | Portland, OR |
| 1976 | William Whitacre | Boise, ID | Michael Schemm | Portland, OR |
| 1977 | Dick Vandenburg | Boise, ID | Yasser Seiarawan | Seattle, WA |
| (tie) | Larry R. Parsons | Boise, ID | | |
| 1978 | William Whitacre | Boise, ID | Todd Q. Miller | Salt Lake City, UT |
| 1979 | Larry R. Parsons | Boise, ID | Jerome V. Weikel | Reno, NV |
| 1980 | Richard Burchett | Boise, ID | Todd Q. Miller | Salt Lake City, UT |
| 1981 | Yge Visser | Netherlands | Eric Tangborn | Tacoma, WA |
| (tie) | Richard Burchett | Boise, ID | | |
| 1982 | Paul Johnson | Boise, ID | IM John Donaldson | Seattle, WA |
| (tie) | Larry R. Parson | Boise, ID | Craig Madsen | Salt Lake City, UT |
| 1983 | Larry R. Parsons | Boise, ID | Craig Madsen | Salt Lake City, UT |
| 1984 | Larry R. Parsons | Boise, ID | Viktors Pupols | Bremmerton, WA |
| 1985 | Paul Johnson | Boise, ID | Viktors Pupols | Bremmerton, WA |
| 1986 | Leslie R. Colin | Boise | Viktors Pupols | Bremmerton, WA |
| 1987 | Larry R. Parsons | Boise, ID | Fred M. Nelson | Murray, UT |
| | | | Stewart Q. Sutton | Caldwell, ID |
| 1988 | Stewart Q. Sutton | Caldwell, ID | Kevin D. Johnson | West Valley City, UT |
| (tie) | Steven Allie | Lewiston, ID | | |
| 1989 | Larry R. Parsons | Boise, ID | no tournament | |
| 1990 | Joseph Kennedy | Star, ID | Larry R. Parsons | Boise, ID |
| 1991 | Joseph Kennedy | Star, ID | Larry R. Parsons | Boise, ID |
| 1992 | Joseph Kennedy | Star, ID | Michael A. Henderson | Boise, ID |
| 1993 | Michael A. Henderson | Boise, ID | Joseph Kennedy | Star, ID |
| 1994 | Larry R. Parsons | Boise, ID | Leslie R. Colin | Boise, ID |
| (tie) | Daniel D. Drumm | Boise, ID | James H. McGarvey | Boise, ID |
| 1995 | John B. Carr | Pocatello, ID | no touranment | |
| (tie) | Jim A. McClure | Boise, ID | | |
| 1996 | Larry R. Parsons | Boise, ID | GM Walter S. Browne | Berkley, CA |
| 1997 | Leroy Hill | Mtn. Home AFB | IM John Donaldson | San Francisco, CA |
| (tie) | Larry R. Parsons | Boise, ID | |   |
| (tie) | Stewart Q. Sutton | Boise, ID | | |
| 1998 | Larry R. Parsons | Boise, ID | IM John Donaldson | San Francisco, CA |
| 1999 | Larry R. Parsons | Boise, ID | Garrett Reynods | Twin Falls, ID |
| 2000 | Larry R. Parsons | Boise, ID | no tournament | |
| 2001 | Larry R. Parsons | Boise, ID | Hans M. Morrow | Pocatello, ID |
| (tie) | Stewart Q. Sutton | Boise, ID | | |
| (tie) | Glen Buckendorf | Buhl, ID | | |
| 2002 | Michael D. Gold | Boise, ID | Robert Keough | Boise, ID |
| (tie) | Larry R. Parsons | Boise, ID | David J. Eacker | Moscow, ID |
| 2003 | Michael D. Gold | Boise, ID | no tournament | |
| 2004 | Stewart Q. Sutton | Boise, ID | Gregory W. Nowak | Missoula, MT |
| (tie) | Dylan T. Smith | Boise, ID | Jesse B. Brent | Pocatello, ID |
| (tie) | David J. Eacker | Moscow, ID | Michael E. Vander Sys | Ogden, UT |
| 2005 | Karl T. Disher | Boise, ID | IM John Donaldson | San Francisco, CA |
| 2006 | Garrett Reynolds | Twin Falls, ID | Patrick M. Flynn | Boise, ID |
| (tie) | Daniel A. Taylor | Eagle, ID | | |
| 2007 | Hans M. Morrow | Pocatello, ID | Randy Zumbrunnen | Salt Lake City, UT |
| 2008 | Jason Evers | Fruitland, ID | Hans M. Morrow | Salt Lake City, UT |
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