Poker probability frequencies are calculated in a manner similar to that shown for 5-card hands, except additional complications arise due to the extra two cards in the 7-card poker hand. The total number of distinct 7-card hands is formula_3. It is notable that the probability of a no-pair hand is "less" than the probability of a one-pair or two-pair hand. The Ace-high straight flush or royal flush is slightly more frequent (4324) than the lower straight flushes (4140 each) because the remaining two cards can have any value; a King-high straight flush, for example, cannot have the Ace of its suit in
Poker hand poker"). So while the "majority" of poker game variations are played "high hand", where the best high "straight, flush etc." wins, there are poker variations where the "worst hand" wins, such as "low ball, acey-ducey, high-lo split etc. game variations". To summarize, there can be variations that are "high poker", "low poker", and "high low split". In the case of "high low split" the pot is divided among the best high hand and low hand. Poker has many variations, all following a similar pattern of play and generally using the same hand ranking hierarchy. There are four main families