• Number Nine is a variant of seven-card stud in which 9s are wild, and any two number cards that add up to 9 may make one wild card, at the player's option. Aces count as 1 for wild card purposes. The player is not obliged to make any wild cards, and can play cards that could make 9s at face value or as wild cards, at his option. Cards used to make wild cards may not figure in the resulting hand twice. The player cannot add three or more cards. Sometimes, 9s themselves are not wild, and wild cards can be made only by addition.
• Draft (or "socialist poker") is usually a variant of seven-card stud in which the second and subsequent upcard rounds are dealt this way: for each player remaining, one upcard is dealt to the center of the table (not to any specific player). The player with the worst showing hand gets to choose which of them he will take for his next upcard, then the player with the second-worst showing hand chooses his upcard from those left, and so on, until the player who previously had the best showing hand takes the remaining card. Then betting occurs as normal. In seven-card stud, this makes for three "draft" rounds (the first three cards are dealt normally, as is the final downcard).
• Auction is a similar variation in which each upcard round (or possibly just those after the first) begins with an "auction" phase. Instead of dealing each player one upcard, the first card is dealt to the center and all players bid on it; the player who bids the highest amount places that amount into the pot, and then has the right to either keep the auction card as his own upcard, or designate another player who is required to take it as his. After the first card is auctioned off and placed, the remaining players are dealt a random upcard as usual, and betting proceeds as usual. This variation is commonly played as high-low split, so it is common for a player to "purchase" a high card to force it upon an opponent seeking low, for example.
• Let it ride is a form of stud poker played at some casinos.
3. Community card poker
Probably starting about the time of World War II, many modern poker games used community cards (also called "shared cards" or "widow cards"), which are cards dealt face up to the center of the table and shared by all players. In these games, each player is dealt privately an incomplete hand ("hole cards"), which is then combined with the community cards to make a complete hand. The set of community cards is called the "board" or the "widow", and may be dealt in a simple line or arranged in a special pattern; rules of each game determine how they may be combined with each player's private hand.
The canonical community card game today is probably Texas hold 'em (and variants thereof), originating sometime in the 1920s. That game is described in great detail on its own page, while most of the descriptions below are brief and refer to that more detailed page (a few other games merit their own page as well, such as Omaha hold'em).
In home games, it is typical to use antes, while casinos typically use only blinds for these games. Fixed limit games are most common in casinos, while spread limit games are more common in home games. No limit and pot limit games are less common, but some games play particularly well with those structures. As with stud poker, later betting rounds often have a higher limit than earlier betting rounds. Each betting round begins with the player to the dealer's left (when blinds are used, the first round begins with the player after the big blind), so community card games are generally positional games.
Most community card games do not play well with lowball hand values, though some do play very well at high-low split, especially with ace-to-five low values, making it possible to win both halves of a pot. When played high-low split, there is generally a minimum qualifying hand for low (often 8-high), and it is played cards speak.
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