Answer
The world chess championship title passed from José Raúl Capablanca to Alexander Alekhine in 1927 when Alekhine won their closely contested match in Buenos Aires. The match went the full distance of 34 games, with Alekhine winning six, Capablanca winning three, and 25 games drawn. It marked a changing of the guard in the chess world, as Capablanca had dominated the game for the previous decade.