Thus, while the outcome of any particular hand significantly involves chance, the long-run expectations of the players are determined by their actions chosen on the basis of probability, psychology, and game theory. With the exception of initial forced bets, money is only placed into the pot voluntarily by a player who either believes the bet has positive expected value or who is trying to bluff other players for various strategic reasons. If more than one player remains in contention after the final betting round, a showdown takes place where the hands are revealed, and the player with the winning hand takes the pot. If all but one player folds on any round, the remaining player collects the pot without being required to reveal their hand. The betting round ends when all players have either called the last bet or folded. A player who matches a bet may also 'raise' (increase) the bet. The action then proceeds clockwise as each player in turn must either match (or 'call') the maximum previous bet, or fold, losing the amount bet so far and all further involvement in the hand. In standard poker, each player bets according to the rank they believe their hand is worth as compared to the other players. In most modern poker games, the first round of betting begins with one or more of the players making some form of a forced bet (the blind or ante). Thus poker games vary in deck configuration, the number of cards in play, the number dealt face up or face down, and the number shared by all players, but all have rules that involve one or more rounds of betting. While the earliest known form of the game was played with just 20 cards, today it is usually played with a standard deck, although in countries where short packs are common, it may be played with 32, 40 or 48 cards. It is played worldwide, but in some places the rules may vary. Poker is a family of comparing card games in which players wager over which hand is best according to that specific game's rules. For the magazine, see Poker Player.Ī game of Texas hold 'em in progress.

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