Poker is a game of chance where each player attempts to make the best hand. The outcome of each betting round is determined by the cards dealt to the players and by their betting patterns.
The game of poker is usually played with a number of players around a table, each with their own stack of chips. Depending on the rules of the game, each player may place an initial bet before the cards are dealt.
Before the first bet is made, each player may “check”, which means that they do not place a bet; “open”, which means that they make the first bet; or “fold”, which means that they drop out of the hand and lose any bets already placed.
After the first bet, each player in turn must either “call”, which is to match the highest bet so far made; or “raise”, which is to increase the previous high bet. If no opponents call a player’s bet or raise, the betting round ends.
To help track bets, each player in turn may “stack”, which means that they place the entire amount of chips that they have placed into the pot into the center of the table or into the hands of the dealer, if this is permitted by the rules. This prevents confusion over the amount of a bet or raise; it is also useful for tracking bet amounts in cash games and for ensuring that all players have been called.