The history of this game is very, very confusing. According to one version, the game was invented in the USSR based on the English analogue "Black Jack". But if "Black Jack" (Jack of Spades) was played with a deck of 52 or 54 cards, then "Ochko" was played with a deck of 36 cards. Supporters of this version of the origin of the game pay attention to this nuance, because the deck of 36 cards was most common in the Soviet space.