Poker is a type of card game whereby players gamble on the strength and value of their hands (card combinations) against a standard hand strength hierarchy. The winner of a round either produces the highest hand combination, or becomes the only player remaining in the pot (community amount of chips) after all other players have folded (laid down their cards). There are many variants of poker, but they commonly involve several rounds of betting, a showdown (presentation and comparison of players cards) and some also involve community (or shared) cards.