Guts is one of the simplest poker variations. Its simplicity can get an
inexperienced player in a bind because Guts also can begin as a low-stakes game
and develop into a high-stakes game.
Guts can be played with as few as 2 cards but it is usually played with 3 or 5 cards. In a three-card game, straights and flushes usually don't count. Then the highest hand is three aces. There are, however, three-card guts games that do allow straights and flushes. In those games straights are often higher than flushes. In five-card Guts, a Royal Flush is the highest hand.
Guts can actually be played in any draw poker game. The dealer declares beforehand that the game will be Guts Draw Poker. Then the game follows a combination of Draw Poker rules and Guts rules.
In Guts there are only two possible bets: "in" or "out". The declaration usually goes around the table ending with the dealer. This gives an advantage to the dealer so, there are two well-known variations of Guts designed to reduce the dealer's advantage. There are also variations of Guts designed to reduce the financial hit losing players receive.