Big O poker: 5-card Omaha hi-lo explained

Big O is 5-card Omaha hi-lo: each player gets five hole cards, and the pot is split between the best high hand and the best qualifying low hand. It’s usually played pot-limit. You still use exactly two hole cards and three board cards — and you can use different cards for the high and the low. See Omaha hi-lo.

The low hand

A low hand needs five different cards of 8 or lower (aces count low).
The best possible low is A-2-3-4-5 (the “wheel”).
If no player can make a qualifying low, the high hand wins the whole pot.

Why Big O is special

With five cards, players hold many more low combinations. That means:

Nut lows get split often (quartered). Holding just the nut low can win only a quarter of the pot.
Scooping (winning both halves) is the goal. Hands that can win high and low are gold.

Good starting hands

A-2 with another low card and a suit, e.g. A-2-3-x-x with a suited ace.
Hands with A-2 and A-3 combinations plus high potential.
Avoid middle cards (9, 10, J without A-K-Q support) that can’t make good lows or strong highs.

Tips

Draw to the nuts in both directions when possible.
Be careful with low-only hands: you can get quartered.
Counterfeiting: board cards can duplicate your low cards and ruin your low — keep backup low cards.

FAQ

What is Big O poker?

Five-card Omaha hi-lo, usually pot-limit, with the pot split between the best high and the best eight-or-better low.

What qualifies as a low hand in Big O?

Five different cards of eight or lower, using exactly two hole cards and three board cards.

What does it mean to get quartered?

Splitting the low half of the pot with another player, winning only a quarter of the pot.

What are good Big O starting hands?

Hands with A-2 plus another low card and a suited ace, ideally with high potential too.