Poker is a card game in which players place bets with chips (representing money) into the pot before showing their cards. The player with the best hand wins the pot. Poker can be played by any number of players and has many different variants. It is a game that requires a certain amount of skill and psychology, but relies more on chance than most other card games.

A tournament is a competition that takes place over a fixed period of time and involves a large number of competitors, usually from multiple venues. It is common in team sports and racket and combat sports, but can also be found in some board games, card games, and competitive debating.

There are many different forms of poker, but in all the variants the game has a common structure: each round starts with a betting interval. The first player to bet places his or her chips into the pot, and each subsequent player may call or raise that amount.

Poker is played with standard 52-card packs and sometimes with additional cards called jokers. The cards are ranked in order from high to low: Ace, King, Queen, Jack, 10, 9, 7, 6, 4, and 3. A pair is two distinct cards of the same rank; a three-of-a-kind is three distinct cards of the same rank plus a fifth card; a flush is all of the same suit; and a straight is five consecutive cards of the same rank. Ties are broken by the highest card outside a four-of-a-kind.