Poker is a card game in which players place bets on the strength of their hand. The stronger the hand, the more money is won. While poker has some elements of chance, the overall strategy is based on probability, psychology and game theory. Players may also bluff in order to gain an advantage over other players.
A poker hand contains five cards. Each hand ranks in inverse proportion to its mathematical frequency; the more rare the hand, the higher it is ranked. A high card wins ties, and a pair beats any other hand, including three of a kind and straights. A full house is made up of 3 matching cards of one rank and 2 matching cards of another rank, while a flush consists of 5 consecutive cards of the same suit.
The betting round begins after the deal and the player to the right of the button places a bet. The player to the left of the button then has an option to raise or fold his or her hand. The dealer then deals three cards face up on the board, called the flop. The flop can dramatically change the value of any hand that was held pre-flop.