Poker is a card game with many variants, played for money by two or more players. The game involves betting and bluffing, and the object is to execute bets that maximize the long-term expectation of winning. This requires skill and psychology. It also involves knowledge of probability and game theory.
Players place bets into a central pot (representing money) in turn, each placing at least the minimum amount required by the rules of the particular poker variant being played. After one or more forced bets (usually an ante and/or blind bet), the dealer shuffles and deals cards to each player, beginning with the player on his left. The cards may be dealt face up or face down, depending on the rules of the particular game. During the first of what may be several betting rounds, each player develops his or her hand by discarding or drawing replacement cards, if allowed.
Each player attempts to form the best five-card poker hand from his or her own two personal cards and the community cards. A poker hand can consist of any combination of the following:
A pair is two cards of the same rank, either high or low. A flush is 5 cards of consecutive rank in the same suit. A straight is 5 cards in sequence, but may skip a rank (e.g., 5-6-7-8-9). A royal flush is an ace high straight and is the highest poker hand. Poker is a card game that is popular in casinos around the world.