A♣5♣ BB vs UTG, preflop, 60 bb
The spot
- You: BB
- Opponent: UTG
- Your hand: A♣5♣
- Board: preflop, no board yet
- Effective stack: 60 bb
- Pot: 6 bb
6‑max reg battle node with meaningful frequency tradeoffs.
Best core-reg decision?
See the answer
Best play: Call
Why
A5s in the BB facing a UTG open: the BB closes the action and is getting a discounted price to defend, so flatting is correct. A5s realizes well as a defend -- it makes the nut flush, the wheel straight, and pairs of aces, while keeping villain's whole range in rather than blowing them off the pot. You are not strong enough to 3‑bet for value against a tight UTG range, and the BB's free-option check only exists when the pot is unraised, so here the live choices are call or fold -- and the price says call.
Key idea
In the BB you defend wide because you close the action and get a price. A5s is a textbook flat vs an UTG open: nut-flush and wheel potential give it great equity without needing to 3‑bet a tight range.
Common mistake
Over-3-betting A5s for value against a strong UTG range, or thinking the BB should check here -- the check only exists in an unraised pot. Facing an open, blasting A5s as a value 3‑bet runs it into a range that dominates the bluff side.