Guts is quite different from most other poker games (in fact classifying it as a poker game at all is somewhat questionable). Rather than the customary rounds of betting followed by a single showdown, guts features multiple rounds, each of which consist of the decision to be “in” or “out”, and each of which contains a showdown. Only the players who stay “in” participate in the showdown. In the most common version, the player who stays in with the best hand receives the current pot, while all other players who stayed in must match the pot. (For example, if the pot is $5 and three people stay in, then one player will receive the $5 pot and two players will be forced to add $5 each to the pot, thus doubling it.) Then the hand is re-dealt, and all players (even those who were “out” in the last round) can participate again. The game ends when only a single player has the guts to stay “in”, and thus the pot is taken without replenishment.

Each player’s hand usually consists of a reduced poker hand of either 2 or 3 cards. The cards are ranked as in regular 5-card poker, but in some variations straights and flushes count and in some they do not.

Another variation is for three-card guts. The hands are ranked as follows: Three of a kind, straight flush, straight, flush, pair. Each player receives two cards face down. In turn, each player declares whether they’re in or out. If they’re in, they receive their third card face up. The dealer declares last; if no other player has stayed in, then the dealer must have a pair or better to win the pot. Another variation is for the other players to have another chance to declare and challenge the dealer. With this variation, there is no requirement for the dealer’s hand; if no one challenges him, the dealer wins.

Declaring “in” or “out” is similar to declaring high or low in high-low games. Each player takes a chip, places their hands under the table, and either places the chip in one fist or not. Each player then holds their closed fist above the table, and the players simultaneously open their hands to reveal their decision (a chip represents “in”, an empty hand represents “out”).

Because the pot can double (or more) each round, the stakes can grow exponentially, and pots of 50 or 100 times the original ante are not unheard of.

There are many variations. Sometimes only the single player with the worst hand (who stayed in) must add to the pot, but they must double the pot rather than match it. In an especially vicious variation, nobody wins the pot unless nobody else stays in. This can degenerate quickly, when one player must add a large amount to the pot, and decides to stay in until he wins it back. Thus the game continues indefinitely, with one player continually adding larger and larger amounts to the pot. The pot may grow so big that no player has enough cash to match it, leading to arguments about how to end the game. (This variation is not recommended when playing among friends. Often this variation is abandoned after the first really big pot leads to conflict.)

One solution to the exponentially growing pots is to cap them at 50x or 100x the ante. That is, if there are 5 players with an ante of $1, the pot started at $5. If there were 3 doublings, the pot is now at $40. Suppose the “cap the pot at $50″ rule were in force. Then, if another doubling occurred, each loser would pay $40, but the pot would now be at $50 and the extra $30 would be set aside as the ante once there’s a hand with a winner and no loser.

This guide is licensed under the GNU Free Documentation License. It uses material from the Wikipedia.