Solo Whist, sometimes known as English Solo or simply Solo, is a trick-taking card game for four players. Despite the name it is not related to Whist, but derives from an early form of Boston played in the Low Countries, whose direct ancestor, in turn, was the 17th-century Spanish game of Ombre. Its major distinctive feature is that one player often plays against the other three. However, players form temporary alliances with two players playing against the other two if "Prop and Cop" is the current bid. It requires four players using a standard 52 card deck with no jokers. Aces are high and the deal, bidding and play are clockwise.