Samuel “Sammy” Herman Reshevsky (born Szmul Rzeszewski; November 26, 1911 – April 4, 1992) was a Polish chess prodigy and later a leading American chess grandmaster. He was never a full-time chess professional. He was a strong contender for the World Chess Championship from the mid-1930s to the mid-1960s: he came equal third in the 1948 World Chess Championship tournament, and equal second in the 1953 Candidates Tournament. He was an eight-time winner of the U.S. Chess Championship. An outstanding match player throughout his career, Reshevsky excelled at positional play, and could be a brilliant tactician when required. He took a long time over his opening moves, and often found himself under time pressure, but this sometimes unsettled his opponent more than it did Reshevsky.