Omaha is typically played with a table of nine or ten players, and uses a standard deck of 52 cards (no jokers).
In Omaha rules, the two players to the left of the dealer are required to make small and big blind bets (forced bets placed before any cards are dealt) respectively. In a $6-$12 game, for example, the big blind is usually $6 and the small blind is $3. The small blind comes from the player to the left of the dealer, and the big blind posted by the player two to the left.
Because blind bets are forced, the bettors can choose to raise once it is their turn to act again, but only on the first round.
If only two opponents remain, "heads up" rules apply. The person with the dealer button posts the small blind and the other player places the big blind. The dealer acts first before the flop, but last for the remainder of the hand.
Four cards are dealt face down to each player. On the first round, players can either call or raise the blind bet, or fold. Generally, Omaha rules allow a bet and three or four raises per betting round. There’s just one exception – if only two players are competing for the pot, there’s no limit on the number of raises.
Round 2 – The Flop
After the first round, three community cards – called "the flop" – are placed in the centre of the table. In the second round, each player can check if nobody else has placed a bet or, if there is a bet in place, fold, call, raise, or add a new raise.
Round 3 – The Turn
A fourth community card, known as "the turn", is added, and another round of betting takes place.
Round 4 – The River
The fifth and final community card, known as the "river", is exposed before the last round of betting.
Omaha rules dictate that players must make their final hands using exactly two of their four hole cards (cards they’ve kept hidden) and three of the total of five community cards. A player can choose to make both a high and a low hand by combining different cards.
The player with the highest-ranking hand and the player with the lowest-ranking hand split the pot.
Omaha Rules for Low Hands
A low hand must include any two unpaired cards with a rank of 8 or lower with three unpaired community cards, also with a rank of 8 or lower. If no player can form a low hand, the full pot will go to the player with the winning high hand.