Online poker is the game of poker played over the Internet. It has been partly responsible for a dramatic increase in the number of poker players worldwide.

Traditional or brick and mortar, live venues for playing poker, such as casinos and poker rooms, may be intimidating for novice players and are often located in geographically disparate locations. In addition, brick and mortar casinos are reluctant to promote poker because it is difficult for them to profit from it. Though the rake, or time charge, of traditional casinos is often high, the opportunity costs of running a poker room are even higher. Brick and mortar casinos often make much more money by removing poker rooms and adding more slot machines.

Online venues, by contrast, are dramatically cheaper because they have much smaller overhead costs. For example, adding another table does not take up valuable space like it would for a brick and mortar casino. Online poker rooms also allow the players to play for low stakes as low as 1¢/2¢ and often offer poker free roll tournaments where there is no entry fee, attracting beginners and/or less wealthy clientele.

Online venues may be more vulnerable to certain types of fraud, especially collusion between players. However, they have collusion detection abilities that do not exist in brick and mortar casinos. For example, online poker room security employees can look at the hand history of the cards previously played by any player on the site, making patterns of behavior easier to detect than in a casino where colluding players can simply fold their hands without anyone ever knowing the strength of their holding. Online poker rooms also check players' IP addresses in order to prevent players at the same household or at known open proxy servers from playing on the same tables

Typically, online poker rooms generate the bulk of their revenue via four methods. First, there is the rake. Rake is collected from most real money ring game pots. The rake is normally calculated as a percentage of the pot based on a sliding scale and capped at some maximum fee. Each online poker room determines its own rake structure. Since the expenses for running an online poker table are smaller than those for running a live poker table, rake in most online poker rooms is much smaller than its brick and mortar counterpart.

Second, hands played in pre-scheduled multi-table and impromptu sit-and-go tournaments are not raked, but rather an entry fee around five to ten percent of the tournament buy-in is added to the entry cost of the tournament. These two are usually specified in the tournament details as, e.g., $20+$2 $20 represents the buy-in that goes into the prize pool and $2 represents the entry fee, de facto rake. Unlike real casino tournaments, online tournaments do not deduct dealer tips and other expenses from the prize pool.

Third, some online poker sites also offer games like blackjack or side bets on poker hands where the player plays against the house for real money. The odds are in the house's favor in these games, thus producing a profit for the house. Some sites go as far as getting affiliated with online casinos, or even integrating them into the poker room software.

Fourth, like almost all institutions that hold money, online poker sites invest the money that players deposit. Regulations in most jurisdictions exist in an effort to limit the sort of risks sites can take with their clients' money. However, since the sites do not have to pay interest on players' bankrolls even low-risk investments can be a significant source of revenue.

Differences compared with conventional poker

There are substantial differences between online poker gaming and conventional, in-person gaming.

One obvious difference is that players do not sit right across from each other, removing any ability to observe others' reactions and body language. Instead, online poker players learn to focus more keenly on betting patterns, reaction time, speed of play, use of check boxes/auto plays, opponents' fold/flop percentages, chat box, waiting for the big blind, beginners' tells, and other behavior tells that are not physical in nature. Since poker is a game that requires adaptability, successful online players learn to master the new frontiers of their surroundings.

Another less obvious difference is the rate of play. In brick and mortar casinos, the dealer has to collect the cards, shuffle, and deal them after every hand. Due to this and other delays common in offline casinos, the average rate of play is around thirty hands per hour. However, online casinos do not have these delays. The dealing and shuffling are instantaneous, there are no delays relating to counting chips for a split pot, and on average, the play is faster due to auto-action buttons where the player selects his action before his turn. It is not uncommon for an online poker table to average ninety to one hundred hands per hour.

Online poker is considerably cheaper to play than conventional poker in many ways. While the rake structures of online poker sites might not differ fundamentally from those in brick and mortar operations, most of the other incidental expenses that are entailed by playing poker in a live room do not exist in online poker. An online poker player can play at home and thus incur no transportation costs to get to and from the poker room. Provided the player already has a somewhat modern computer and an Internet connection, there are no further up-front equipment costs to get started. There are also considerable incidental expenses once on a live poker table. In addition to the rake, tipping the dealers, chip runners, servers and other casino employees is almost universally expected, putting a further drain on a player's profits. Also, whereas an online player can enter and leave tables almost as he pleases, once seated at a live table a player must remain there until he wishes to stop playing, or else go back to the bottom of the waiting list. Food and beverages at casinos are generally expensive even compared to other hospitality establishments in the same city let alone compared to at home and casino managers feel little incentive to comp poker players.

Hands for Poker

Best Poker Hands

Royal Flush: An Ace, King, Queen, Jack and Ten in the same suit.
In the event of a tie:
Two or more Royal Flushes
split the poker pot.

Straight Flush: Five cards in sequence, of the same suit.
In the event of a tie:
Highest rank at the
top of the sequence wins.

Four of a Kind: Four cards of the same rank, and one side card.
In the event of a tie:
Highest four of a kind wins.
In community card games where players have the same four of a kind, the highest fifth side card ("kicker") wins.

Full House: Three cards of the same rank, and two cards of a different, matching rank.
In the event of a tie:
Highest three matching cards wins the pot. In community poker card games where players have the same three matching cards, the highest value of the two matching cards wins.

Flush: Five cards of the same suit.
In the event of a tie:
The poker player holding the highest ranked card wins. If necessary, the second-highest, third-highest, fourth-highest, and fifth-highest cards can be used to break the tie.

Straight: Five cards in sequence.

In the event of a tie:
Highest ranking card at the top of the sequence wins. Note: The Ace may be used at the top or bottom of the sequence, and is the only card in poker which can act in this manner.

Three of a Kind: Three cards of the same rank, and two unrelated side cards.

In the event of a tie:
Highest ranking three of a kind wins. In community card games where players have the same three of a kind, the highest side card, and if necessary, the second-highest side card wins.

Two Pair: Two cards of a matching rank, another two cards of a different matching rank, and one side card.
In the event of a tie: Highest pair wins. If players have the same highest pair, highest second pair wins. If both players have identical pairs, highest side card wins.

One Pair: Two cards of a matching rank, and three unrelated side cards.
In the event of a tie: Highest pair wins. If poker players have the same pair, the highest side card wins, and if necessary, the second-highest and third-highest side card can be used to break the tie.

High Card: Any hand that does not qualify under a category listed above
In the event of a tie: Highest card wins, and if necessary, the second-highest, third-highest, fourth-highest and smallest card can be used to break the tie.

Poker Chinese

Chinese 13 Card Poker

Chinese Poker is played with a standard 52-card deck. Up to four players can play.

Each poker player receives 13 cards, face down, one at a time, in rotation. A hand is dealt to all four positions even if vacant. The hand must be arranged with three cards in front, five cards in the middle, and five cards in the back, where the back hand should rank higher or equal to the middle hand, and the middle hand should rank higher than the front hand. Standard poker rankings apply. Straights and flushes do not count in the front hand except in the event of an automatic win.

Scores are kept by points. Each part of the hand is assigned one point. Each point is given a monetary value for each game.

Hands are then compared with each player, one at a time. The poker player with the higher ranking hand in the front segment wins one point. The player with the higher ranking middle hand wins one point. The player with the higher ranking back hand wins one point.

If two out of three of the players' hands ranks higher than an opponent's hand, the first player wins two points. For example, the player would win two points, minus one point (the one an opponent won) plus one point for a majority of segments win, thereby, winning two points total.

If all three parts of the player's hand ranks higher than the opponent's hand, the winner gets four points. (The player wins three points (net win), one point for winning each of the three hands minus zero points (the opponent didn't win any) plus one point for the majority of hands won, totaling four points.)

Automatic Win

There are also hands known as an "automatic win" and the player may declare the win by placing the stack of cards down on the table. However, the player must declare the automatic win before the hands are opened, otherwise the hands will play the way the player sets. The automatic win hands are as follows:

1. The Dragon Hand: Ace through King of any suit. This hand beats all other automatic win hands.
2. Any 13-card hand that has six pairs. Note that four-of-a-kind can be counted as two pairs.
3. Any 13-card hand that has suited cards in all three parts.
4. Any 13-card hand that has straights in all three parts.

A Straight Flush can be used as a Straight or a Flush for bonus hands.

Improperly Set Hands

A hand is set improperly if: Any part of the three segment hands has the wrong number of cards; or, any part of the three segment hands are set out of ranking order. Any player that sets his or her hand improperly must pay four points to all of the other players.

Eastern, Western and Mandarin Bonus Points Variations

Eastern Version point awarding Variation: The play of the poker game is the same as 13 Card Poker. In addition to the basic point system as in 13 Card Poker, bonus systems of awarding points is used for making certain hands in the front, middle and back positions. In addition to the basic point system, points can be earned on bonus hands as follows: (a) Bonus point hands in the back: (1) straight flush-five (5) points; (2) Four of a kind- four (4) points. (b) Bonus point hand in the middle: (1) straight flush - then (10) points; (2) Four of a kind - eight (8) points; (3) Full house - two (2) points. (c) Bonus point hands in the front: (1) Three of a kind - three (3) points. If a player wins two out of three hands, the player is awarded two points for their winning hands and loses one point to his opponent for a total of one point from that opponent. When a bonus hand is involved, the winning hand earns only the bonus hand points.

Western Version point awarding Variation: The play of the poker game is the same as 13 Card Poker. In addition to the basic point system, this point system awards one additional point to the poker player who wins the majority of hands. If a player beats his opponent two out of three hands, they receive a total of two points for their winning hands.

Mandarin Version point awarding Variation: The play of the game is the same as 13 Card Poker with opportunities to earn extra points. A player earns one point for each winning hand as in 13 Card Poker. Three of a kind in the front hand triples the point value. A bonus can be received which awards additional points for making certain hands in the front, middle and back positions. If a bonus hand is present, the points for that bonus hand are then added on. Two special bonus situations can occur, the "shot" and the "home run." A "shot" situation occurs when a player wins all three hands against an opponent. The regular point value for each hand is doubles and added to the total. A "home run" situation occurs, only in a four-handed game, when a player wins all three hands on the showdown against all three of their opponents. The regular point value for each hand is tripled and added to the total.