Poker is a card game where players make decisions based on probabilities, psychology, and game theory. The object of the game is to win. The players put money in the pot before the game begins and can only withdraw their chips once the game is over. However, they can check the pot when another player raises the pot, and when a dealer raises the pot, all players have to fold. To play the game, players use poker chips, which can be red, white, blue, or green. These chips are normally assigned values by the poker dealer before the game begins.

There are two ways to win in poker: betting or bluffing. In both cases, the winning hand is the highest hand. The lowest hand is a pair of aces. In poker, an ace may be treated as the lowest card, but in some games, it may not be treated as such.

Each round of the game has a dealer, who is responsible for dealing out the cards and shuffling the deck. The dealer can be a player or a non-player. In both cases, players take turns being the dealer. The dealer chip is used to designate the dealer in each round. Once the round ends, the dealer must pass the chip on to another player. The location of the dealer influences certain betting rules.

In live poker, the player to the immediate right of the button deals the cards. The button is used to mark the dealer, and in many versions is a plastic disk. The button is passed clockwise after each hand.