Poker hands are constructed of playing cards according to predetermined rules, which vary according to which variant of poker is being played. These hands are compared using a hand ranking system that is standard across all variants of poker, the player with the highest-ranking hand winning that particular deal in most variants of poker. In some variants, the lowest-ranking hand can win or tie. These hand rankings are also used in some other card games, and in poker dice. The ranking of a particular hand is increased by including multiple cards of the same card rank, by all five cards being from the same suit, or by the five cards forming a consecutive series. The relative ranking of the various hand categories is based on the probability of being randomly dealt such a hand from a well-shuffled deck. The hand category with the highest ranking is the straight flush, which consists of hands that contain five cards in sequence, all of the same suit. An ace-high straight flush is known as a royal flush (example pictured), and is the highest-ranking standard poker hand. (Full list...)