Mark Brader has provided the following tables of probabilities of the various five-card poker hands when five cards are dealt from a single 52-card deck, and also when using multiple decks.
The traditional hand types are described on the poker hand ranking page. These include one hand that belongs to two types at once - a straight flush is both a straight and a flush. With two or more decks, it is possible for other combinations to occur, such as a hand that has both a flush and a pair (such as 4-6-6-8-9 all of one suit). The left-hand tables include these composite hand types for multiple decks; in these tables 'plain' means a hand that is not a flush.
2-Deck Poker Hand Rankings and Probabilities Since hand combinations would be built differently, you would run into some issues when determining hand rankings. The problem with 2-deck poker is that the rankings would not flow logically the same way it does in normal poker. Short-Deck is the answer. Also known as, Triton Hold’em, Short-Deck has its roots in Asia, where successful businessmen, and poker lovers, Paul Phua and Richard Yong, experimented by removing a few cards from the standard 52-card deck, increasing the likelihood of strong pre-flop hands. Out went the 2s. Aether Gilded Playing Cards 2 Deck Set. Regular price $149.99 — Sold Out. Aether Playing Cards USPCC. Regular price $14.99.
Hand Decks Poker Tournaments
Hand Decks Poker Card Game
The hands are listed in descending order of probability, which could be used as the basis for their ranking order in multi-deck poker variations. It can be seen that as the number of decks increases, flushes become easier to make than straights, and sets of equal cards become more common.
Hand Decks Poker Game
Hand Decks Poker Games
Here is the Perl program that produced the tables. Mark Brader has placed both the program and the tables in the public domain.