Big O poker (Five-Card Omaha Hi-Lo, also called 5-Card PLO8) is a poker variant where each player receives five hole cards and must use exactly two of them with three community cards. Like Omaha Hi-Lo, the pot is split between the best high hand and the best low hand (five unpaired cards 8-or-lower).
With five hole cards, Big O dramatically increases complexity — and the importance of starting hand selection.
Premium Big O Starting Hand
The hand above — A♠2♥3♣4♦K♠ — is one of the strongest you can be dealt in Big O:
- You hold A-2-3-4: four cards needed for the nut low (A-2-3-4-5)
- The King provides Broadway coverage (A-K-Q-J-T straight)
- Multiple straight draws and scoop potential
The Ultimate Big O Hand: A-2-3-4-5 (The Wheel)
A♦2♥3♣4♠5♦If you’re dealt A-2-3-4-5, you have the nut low already made — A-2-3-4-5 is the perfect low hand. Plus a wheel straight (5-high). Challenge: no high-card backup. On a board without low cards, this hand is weak on the high side.
What Makes a Strong Big O Starting Hand?
- Low cards (A-2-3-4-5): The nut low is A-2-3-4-5. Hands with A+2+3 are premium.
- High connectivity: Cards that connect for straights and flushes
- Suitedness: Suited aces dramatically increase flush draw value
- Scoop potential: Can win both the high AND low half of the pot
Premium: A-A-2-3-x (Double-Suited)
A♠A♥2♠3♥K♦A pair of aces with A-2-3. Double-suited (A♠…2♠ and A♥…3♥) gives you:
- Two nut flush draws
- The nut low draw (A-2-3 on a low board)
- A-A for high-hand backup
- Multiple ways to scoop the entire pot
Big O Starting Hand Categories
| Category | Example | Why It Works |
|---|---|---|
| Nut Low + High | A♠2♥3♣K♦Q♠ | Nut low draw + Broadway coverage |
| Double-Suited Aces | A♠A♥2♠3♥K♦ | AA + two nut flush draws + nut low |
| Rundown Low | A♦2♥3♣4♠5♦ | Every low combination possible |
| Nut Low + Flush | A♥2♥3♦4♦K♠ | Two flush draws + nut low |
Hands to Avoid in Big O
K♠K♥Q♠J♦10♣ — K-K-Q-J-T is a pure high hand. Fine in PLO, but in Big O Hi-Lo you’re giving up half the pot every time the board runs low. You’ll constantly be scooped by players holding A-2-3-x-x. Avoid hands with no low potential.
Other hands to avoid:
- Three-of-a-kind in hand (e.g., A-A-A-K-Q): You can only use 2 of 5 cards
- Paired low cards (e.g., A-A-2-2-K): Reduces your low-making combinations
- Disconnected rags (e.g., 8-6-4-2-off): Weak low draw, no nut potential
Big O Strategy Tips
- Always have a low draw: Giving up the low half = giving up 50% of the pot
- Suitedness doubles value: Suited aces are powerful — use them fully
- Draw to the NUT low: A low of 6-7-8-A-2 loses to A-2-3-4-5
- Position matters: Act last to see how players split high vs. low before committing
- Scoop or fold: The best Big O players target pots they can win entirely
For more on hand selection, check out our guide to Texas Hold’em starting hands and cash games vs. tournaments.
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