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| Full name | Algimantas Butnorius |
|---|---|
| Country | Soviet Union Lithuania Monaco |
| Born | 20 November 1946 Lithuania |
| Title | World Senior Champion (2007), Grandmaster (2007) |
| Peak rating | 2456 (July 1999) |
Algimantas Butnorius (born 20 November 1946) is a Lithuanian chess Grandmaster and a former World Senior Champion. From 2014 he represented Monaco.
He won the Lithuanian Chess Championship on ten occasions: in 1967, 1968 (shared with Vladas Mikėnas), 1970, 1972 (shared with Gintautas Piešina), 1973 (shared with Jegor Čiukajevas), 1975, 1976, 1980, 1982 and 1993. In team chess, he represented Lithuania at the Chess Olympiads of 2000, 2004, 2006 and in the European Team Chess Championships of 1999 and 2003. He won the World Senior Chess Championship in 2007. In 2010, he tied for 2nd-4th with Vitaly Tseshkovsky and Nikolai Pushkov in the European Seniors’ Rapid Championship.
Butnorius was awarded the International Master title in 1983 and the Grandmaster title in 2007, as a result of his World Senior success.
In the November 2009 FIDE list, he has an Elo rating of 2432, making him Lithuania's number nine.