One preflop decision with an offsuit ace in the big blind. The button opens, and the right answer is easy — what is worth learning is why this seat, and only this seat, lets you defend this wide.
Hand info
Single raised pot, no ante. Blinds 0.5 / 1.
PREFLOP · 100BB EFFECTIVE
BTN OPEN
6-max table. Hero is BB with 100 big blinds effective. BTN OPEN. Hero holds Ah and 7c.
Hand history
Pre-flop
It folds to the button, who opens to 2.5bb. The small blind folds. You are in the big blind with A♥7♣ — an offsuit ace — 100bb behind, and 1.5bb more to call into a 4bb pot.