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Mikhail Moiseyevich Botvinnik (Russian: Михаи́л Моисе́евич Ботви́нник, romanized: Mikhaíl Moiseyevich Botvínnik) [a] (August 17 [O.S. August 4] 1911 – May 5, 1995) was a Soviet and Russian chess grandmaster who held five world titles in three different reigns.