In a series of test matches held on 19 December, AlphaStar decisively beat Team Liquid’s Grzegorz ' MaNa' Komincz, one of the world’s strongest professional StarCraft players, 5-0, following a successful benchmark match against his team-mate Dario “ TLO” Wünsch. Now, we introduce our StarCraft II program AlphaStar, the first Artificial Intelligence to defeat a top professional player.