Vladimir Sergeyevich Antoshin was a Russian Grandmaster (GM) of chess, best known for his contributions to the development of chess opening theory. Antoshin was born on 14 May 1929 and died on 13 May 1994.
A graduate of Moscow Institute of Physical Culture, he worked as a chess trainer and value and theory of physical training lecturer. He was awarded the title of International Master in 1962 and the title of Grandmaster in 1964.
As a player, his career highlights include participating in the Russian national chess championship 12 times, with his best results being tied for 4th-5th places in 1967 and 5th place in 1963 and 1968. Additionally, Antoshin shared first place in the 1960 USSR championship qualifying tournament.
Antoshin made several contributions to chess theory, particularly in the Philidor Defence, the French Defence, and quite notably in the King's Indian Defence with a variation named the Antoshin Variation in his honor. He also participated in several team events, contributing towards seven team gold medals for the Soviet team in European Team Championships and Chess Olympiads.
His international tournament results include shared first place with Polugaevsky in Kislovodsk 1962 and first place in Bucharest 1964.
Despite never reaching the top of international chess, Antoshin was well-known and well-respected in chess circles for his skills, contribution to chess theory, and his sportive spirit.