A♦9♣ CO vs BTN, preflop, 105 bb
The spot
- You: CO
- Opponent: BTN
- Your hand: A♦9♣
- Board: preflop, no board yet
- Effective stack: 105 bb
- Pot: 2 bb
Villain opens and action is on hero preflop.
Which action keeps the best EV baseline?
See the answer
Best play: Call
Why
Villain opens on the BTN and hero is in CO, so hero faces a steal and can 3‑bet, flat, or fold. A♦9♣ flats fine here: the ace blocker and decent top-pair potential beat villain's wide steal, while it is too kicker-dominated to 3‑bet for value, so calling realizes equity in position over the blinds without turning a marginal ace into a bluff.
Key idea
Offsuit aces with weak kickers prefer flatting wide steals over 3-betting: the ace blocker helps, but a dominated kicker means 3-betting only gets called by better.
Common mistake
3-betting A9o for value. Reverse implied odds bite when a stronger ace calls; flatting in position avoids the dominated-kicker trap.