Poker is a card game in which players compete against each other in a bid to win the pot. In each betting round, all players have an equal opportunity to raise or fold, and only one of them can reveal their winning hand. Players place bets by betting with their chips, and during the last round, players must match or raise the current open bet. The winning player takes the pot. Poker is played with a deck of 52 cards, but some versions of the game use different decks.

The game is played with a standard 52-card pack. Sometimes, a joker is added to a deck for speed. When the number of players increases, players move onto the next round. This continues until only one player is left in the game. In the final hand, the player with the best hand wins the pot. Poker hands consist of five cards, and count for the highest combination among those five cards. In the case of a draw, the pot is divided equally among all players.

There are many variations of poker. Most variations of the game award the pot to the best hand, whereas other poker games award the pot to the lowest. For example, the best hand in a full house contains three cards of one rank and two cards of the other. Flushes and straights are not considered in some games, but instead split the pot between the highest and lowest hands. For players with higher-ranking hands, the top two hands may be combined to form a royal flush.