Poker

Poker is a family of card games in which players wager money or chips by comparing the strength of their card combinations. The game is played with a standard 52-card deck by two or more participants. The winner takes the entire amount wagered (the pot) when all cards are revealed, or when all other players have folded before that point.

What distinguishes poker from other wagering card games is that information is incomplete: each player sees only their own cards, not those of others. Decisions therefore rest on probability, reading opponents' behavior, and bluffing or representing false information. It is regarded as a hybrid game combining chance and skill, and serves as a prominent testing ground for decision theory and game theory.

Hand rankings

In most poker variants, a hand consists of five cards. Rankings ascend from high card, one pair, two pair, three of a kind, straight (five cards in sequence), flush (five cards of the same suit), full house (three of a kind plus a pair), four of a kind, straight flush, and royal flush. The rarer the combination, the higher its rank. Some "lowball" variants reward the weakest hand.

Game structure and betting rounds

The game proceeds in rounds. In each round, a player may fold, call (match the previous bet), raise, or check (if no prior bet exists in that round). When betting rounds conclude and two or more players remain, cards are revealed (showdown) and the pot is split. Many variants use forced bets at the start (blinds or antes) to build the pot.

Major variants

Texas hold'em is the most popular variant today: each player receives two private cards, and five community cards are dealt face-up on the table for all to use. Omaha gives each player four private cards, but they must use exactly two of them. Older variants like five-card draw and seven-card stud are still played. Betting structures also vary: no-limit, pot-limit, and fixed-limit.

Competition and custom

Poker is played in homes, casinos, and online. Large international tournaments exist, most commonly in tournament format where each participant pays an entry fee, receives chips, and is eliminated when their chips run out. The legal status of poker varies by country; some recognize it as a game of skill, others do not. Islam prohibits gambling, which is why the game is restricted in many Muslim-majority countries.