Omaha is played with 52 cards. In decreasing order, the rank of the cards is ace, king, queen, jack, 10, 9, 8, 7, 6, 5, 4, 3, and 2. The ace can, however, be used to create an ace-2-3-4-5 straight flush.
Here are the possible combinations, in decreasing order:
- Royal flush: A hand containing an ace, a king, a queen, a jack and a 10 of the same suit
- Straight flush: A series of five consecutive cards of the same colour
- Four of a kind: A hand containing four cards of the same rank
- Full house: A hand containing three cards of the same rank (three of a kind) and a pair
- Flush: A combination of five cards of the same suit
- Straight: A hand containing five consecutive cards regardless of suit
- Three of a kind: Three cards of the same rank
- Two pair: Two pairs (the rank of the hand is determined by the higher of the two pairs)
- Pair: Two cards of the same rank
- High card: The highest-ranking card