It is often said that Omaha is a game of "the nuts", i.e. the best possible high or low hand, because it frequently takes "the nuts" to win a showdown. It is also a game where between the cards in his hand and the community cards a player may have drawing possibilities to multiple different types of holdings. For example, a player may have both a draw to a flush and a full house using different combinations of cards. At times, the players themselves have trouble figuring out what draws and possibilities their cards hold.

The basic differences between Omaha and Texas hold 'em are these: first, each player is dealt four cards to his private hand instead of two. The betting rounds and layout of community cards are identical. At showdown, each player's hand is the best five-card hand he can make from exactly three of the five cards on the board, plus exactly two of his own cards. Unlike Texas hold 'em, a player cannot play four or five of the cards on the board with fewer than two of his own.

Some specific things to notice about Omaha hands are:

* As in Texas hold 'em, three or more suited cards on the board makes a flush possible, but unlike that game a player always needs two of that suit in his hand to play a flush. For example, with a board of K♠ 9♠ Q♠ Q♥ 5♠, a player with A♠ 2♥ 4♥ 5♣ cannot play a flush using his ace as he could in Texas hold 'em; he must play two cards from his hand and only three from the board. A player with 2♠ 3♠ K♦ J♦ can play the spade flush.

* Two pair on the board does not make a full house for anyone with a single matching card as it does in Texas hold 'em. For example, with a board of J♠ J♦ 9♦ 5♥ 9♣, a player with a hand of A♠ 2♠ J♥ K♦ cannot play a full house; he can only use his A-J to play J♠ J♥ J♦ A♠ 9♣, since he must play three of the board cards. A player with 2♣ 5♣ 9♠ 10♠ can use his 9-5 to play the full house 9♠ 9♣ 9♦ 5♥ 5♣.

* Likewise, with three of a kind on the board, a player must have a pair in his hand to make a full house. For example, with a board of J♠ J♦ A♦ J♥ K♣, a player with A♠ 2♠ 3♥ K♦ does not have a full house, he only has three jacks with an ace-king kicker, and will lose to a player with only a pair of deuces. This is probably the most frequently misread hand in Omaha. (Naturally, a person with the fourth jack in his hand can make four jacks because any other card in his hand can act as the fifth card, or "kicker").