Arthur Bisguier, born 1929, is a US chess International Grandmaster. On March 18, 2005, the United States Chess Federation (USCF) proclaimed him "Dean of American Chess". He is believed to have played more people, of all standards, than any other grandmaster in history.
He was taught chess at the age of four by his father, a mathematician. In 1944, aged 15, he was third at the Bronx Empire Chess Club. In 1946, aged 17, he came fifth in the U.S. Open at Pittsburgh, followed by seventh place in 1948. Later that year, he took the U.S. Junior Championship and was invited to the New York 1948–49 International Tournament.
Army service interrupted his U.S. chess career during 1951-1953, but he played in the Helsinki Olympiad in 1952, amd later that year won the third annual Christmas tournament in Vienna with a 9–2 score and a 2680 performance rating.
After a poor performance in the U.S. Open in 1953, he entered the Philadelphia Candidates' Tournament for the U.S. Championship and came through with a first place finish and another over-2600 performance. His meteoric rise culminated with a winning score in the 1954 U.S. Championship. In 1956, he added the U.S. Open title to his U.S. championship. Most of his play after that was limited to U.S. events. He won National Opens in 1970 (jointly), 1974 and 1978. He won the Lone Pine tournament in 1973, second place in the internal tournament in Puerto Rico in 1969, first place in the first ever Grand Prix in 1980 and first place in the U.S. Senior Open in 1989, thus winning a U.S. championship at every age level of chess. He won the Senior Open again in 1997 and 1998.
For many years, Bisguier was hired to play in towns throughout the U.S. in order to give exhibitions and popularise chess and the USCF. For about 20 years, Bisguier was the representative they sent to a state for one or two days to play at a hospital or college or a prison, all so the public could get a chance to play the grandmaster and former U.S. champion. He said, "I was delighted to do it. I was very lucky to get so much out of chess. I tried to give something back."