Levente Lengyel moved to Budapest in 1949, played only for Budapesti Epitok, then from 1955 for decades for the record champions MTK. In this team, he and Lajos Portisch, László Szabó, István Bilek, Andras Adorjan and later played with the Polgár sisters.
In the years 1960-1970 Lengyel played six times for Hungary at Chess Olympiads. In Havana in 1966, Hungary has won him bronze and silver in Siegen in 1970. In 1962, he scored the third-best result to its board, its balance sheet is at six Olympiads: 25 wins, 32 defeats and 13 drawn games. He was a chess functionary in another three Chess Olympiads it, even at the Chess Olympiad 1980 in Valletta, where only the Buchholz ruled in favor of the Soviet Union and Hungary.
FIDE awarded him in 1964 the title of Grand Master. In 1968 he won the tournament in Solingen for themselves.
Lengyel has won in his chess career two games against world champions ( Mikhail Botvinnik and Mikhail Tal ). He also worked as a trainer, including the Polgár sisters, and chess writer. After dissolution of the chess section of MTK he has retired from active chess life.
His current Elo rating is 2293 (as of June 2013). In 1964, Lengyel was ranked 34 in the world rankings. His best historical Elo rating was 2628, he had his best tournament result in Belgrade in 1969 with 2704 Elo points.