Omaha 8-or-Better, also known as Omaha Hi-Lo, is a popular version of Omaha poker. The basic rules are similar to Omaha which is based on Texas hold'em, but there are some differences which makes the game active and interesting.
Split Pot Games
In Hi-Lo games, the pot is split between the high hand and the low hand. The same cards may be used in declaring "Hi" and "Lo."
One hand may win both the Hi and the Lo halves of the pot. A frequent example of this is "the Wheel", consisting of an Ace-2-3-4-5.
If there is no qualifying hand for Lo, the best Hi hand wins the whole pot.
In the division of the pot, the Hi hand receives any odd chip.
Otherwise, all the regular rules of each game apply except that a qualifier of 8-or-better for the Lo hand applies unless a specific statement to the contrary is made. This means that the winning low hand can only contain cards of the value under 9. Hence in Flop games, the Flop must contain three cards of the value of 8 or lower.
In order to qualify for the low half of the pot, the low hand must be 8, 7, 6, 5, 4 or lower. That's why this game is called "8 or better", or simply "Omaha 8".