A♦9♣ HJ vs CO, preflop, 85 bb
The spot
- You: HJ
- Opponent: CO
- Your hand: A♦9♣
- Board: preflop, no board yet
- Effective stack: 85 bb
- Pot: 8 bb
Villain opens and action is on hero preflop.
Which action keeps the best EV baseline?
See the answer
Best play: Call
Why
Hero holds A9o (A♦9♣, an offsuit ace) in the HJ facing a CO open. This is a flat: A9o has enough ace-high equity and blocker value to continue in position but is dominated by the CO's stronger aces, so 3-betting it for value is thin and 3‑bet-bluffing wastes its showdown equity. Calling realizes equity while keeping the offsuit ace out of reverse-implied-odds trouble that a raise would invite.
Key idea
Dominated offsuit aces like A9o play best as in-position flats versus a late open: keep the pot small and avoid 3-betting into the very hands that crush your kicker.
Common mistake
3-betting A9o for value; it is dominated by the CO's continuing range and folds out only the hands it already beats, leaving it in trouble against the calls.