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
Video poker with pay schedules that offer a theoretical return as high as 100.8 percent, when played with perfect strategy. This full-pay version is found only in Nevada. It is also available with other pay schedules that have lesser theoretical returns: Variations are available that pay different amounts for the quad "deuces", such as Double Deuces (2000), Loose Deuces (2500), Triple Deuces (3000), and Royal Deuces (4000). Full pay Loose Deuces (25-17-10), once common but now rare, is one of the highest return versions of video poker offered. Sigma Flush Attack is a combination of video poker and a banking slot, in