Betting - Forced bets
All poker games require some forced bets in order to create an initial stake for the players to contest. The requirements for forced bets, and the betting limits of the game (see below) are collectively called the game's betting structure.
Ante
An ante is a forced bet in which each player places an equal amount of money or chips into the pot before the deal begins. In home games, the amount of the ante is typically small. In games where the acting dealer changes each turn, it is not uncommon for the players to agree that the dealer provides the ante for each player. This simplifies betting, but causes minor inequities if other players come and go or miss their turn to deal.
Blinds
A blind or blind bet is a forced bet placed into the pot by one or more players before the deal begins, in a way that simulates bets made during play. This is used frequently in casino and tournament games and is designed to ensure there is betting action on each hand. The most common use of blinds as a betting structure calls for two blinds: the player after the dealer blinds about half of what would be a normal bet, and the next player blinds what would be a whole bet. Sometimes only one blind is used, and sometimes three. In the case of three blinds (usually one quarter, one quarter, and half a normal bet amount), the first blind goes "on the button", that is, is paid by the dealer.
For example, the first player to the dealer's left (who would normally be the first to bet after the cards are dealt) makes a blind bet of $1, and the next player in turn posts a big blind of $2. After the cards are dealt, play continues with the next player in turn (third from the dealer), who must either call $2, reraise, or fold. When the betting returns to the player who blinded $1, he must equal the bet facing him (toward which he may count his $1), fold, or reraise.
An additional privilege is given to the player who posted the big blind to compensate for the fact that he is forced to bet. If there have been no raises by the time his first turn to bet voluntarily comes (that is, the bet amount facing him is just the $2 he originally put in), then he is given the right to raise at that point, even though his right-hand opponent's call would normally have closed the betting round under other circumstances. This "extra" right to raise (called a live blind) occurs only once: if his raise is now called by every player, the first betting round closes as usual.
In some fixed limit and spread limit games, the big blind amount is less than the normal betting minimum. Players acting after a sub-minimum blind have the right to call the blind as it is, even though it is less than the amount they would be required to bet, or they may raise the amount needed to bring the current bet up to the normal minimum, called completing the bet. For example, a game with a $5 fixed bet on the first round might have blinds of $1 and $2. Players acting after the blind may either call the $2, or raise to $5. After the bet is raised to $5, the next raise must be to $10 in accordance with the normal limits.
When a player in the blinds leaves the game
When one or more players in the small or big blinds leaves the game, an adjustment is required in the positioning of the blinds and the button. The two most common tournament rules for handling this situation are the dead button and the moving button rules. In online card rooms, a simplified moving button rule is usually employed. Note that other variations on these rules exist.
Dead button rule
Under the dead button rule, the big blind is posted by the player due for it, and the small blind and button are positioned accordingly, even if this means the small blind or the button is placed in front of an empty seat, giving the same player the privilege of last action on consecutive hands.
If the small blind busts out (leaves the game), the button moves to the seat vacated by the eliminated small blind. The player who was the big blind now posts the small blind and the player to his left posts the big blind. Since the button is now located at an empty seat, the player who was the button will, in effect, be the button once again.
If the big blind busts out, the button moves to the player who was the small blind and the player to the left of the eliminated big blind posts the big blind. There is no small blind for that hand. On the following deal, the button moves to the empty seat vacated by the eliminated player and the two players to the left post the normal blinds. Since the button is now located at an empty seat, the player who was the original small blind will, in effect, be the button once again.
If both blinds bust out, the same player will effectively be the button three hands in a row. The button moves to the now empty seat vacated by the eliminated small blind and the player to the left of the eliminated big blind posts the big blind. There is no small blind for that hand. On the following deal, the button moves to the next empty seat (the seat vacated by the eliminated big blind player) and the two players to the left post the normal blinds.
Moving button rule
Under the moving button rule, the button always moves forward to the next player and the blinds adjust accordingly. There may be more than one big blind. In this rule, the button must always move forward to an active player and every player must post a big blind, followed by a small blind. Although the rule sounds simple, it can be confusing to implement. In the extreme scenario of both the big and small blinds exiting the game, on the next deal three players will post big blinds (including the button), and on the deal after that, one big blind and three small blinds (including the button and the player to the right of the button). It can take several deals before the blinds and button are back to normal.
Simplified moving button rule
Under the simplified moving button rule, normally used in on-line card rooms, the button always moves forward to the next player and the small and big blinds post in the two seats to the left of the button. Players may miss blinds.
Bring-ins
A bring-in is a type of forced bet that occurs after the cards are initially dealt, but before any other action. One player, usually chosen by the value of cards dealt face up on the initial deal, is forced to open the betting by some small amount, after which players act after him in normal rotation.
The bring-in is normally assigned on the first betting round of a stud poker game to the player whose upcards indicate the poorest hand. For example, in traditional high hand stud games and high-low split games, the player showing the lowest card pays the bring-in. In low hand games, the player with the highest card showing pays the bring-in. The high card by suit order can be used to break ties if necessary.
In most fixed limit and some spread limit games, the bring-in amount is less than the normal betting minimum. The player forced to pay the bring-in may choose either to pay only what is required or to make a normal bet. Players acting after a sub-minimum bring-in have the right to call the bring-in as it is, even though it is less than the amount they would be required to bet, or they may raise the amount needed to bring the current bet up to the normal minimum, called completing the bet. For example, a game with a $5 fixed bet on the first round might have a bring-in of $2. Players acting after the bring-in can either call the $2, or raise to $5. After the bet is raised to $5, the next raise must be to $10 in accordance with the normal limits.
In a game where the bring-in is equal to the fixed bet (this is rare and not recommended), the game must either allow the bring-in player to optionally come in for a raise, or else the bring-in must be treated as live in the same way as a blind, so that the player is guaranteed his right to raise on the first betting round if he chooses.
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