Hold'em table

Opening on the button with an Ace in 3-handed play is standard to apply pressure on the blinds.

Ace-high with a nine offsuit is too weak to 3-bet against a button open but has enough showdown value to see a flop cheaply from the blinds.

65 offsuit has poor equity against a button raise and a small-blind call, so folding the extra 100 is the better play.

Ace-high with a weak kicker on a paired low board out of position against the preflop raiser; betting wins only via fold equity while check keeps the pot small and preserves the option to fold to pressure or take a free card.

I have position, an overcard, and a gutshot straight draw on a paired board; a small continuation bet of 40% pot applies pressure to SB's check.

Facing a small 200 c-bet into 700 from the preflop raiser on a paired low board; my ace-high has reasonable equity against a wide button betting range and the price is cheap, so I'll call once and reassess on the turn.

I only have ace-high on a paired board with no draws left, so checking minimizes losses; I'll fold to a bet rather than bluff into the preflop raiser's continuing range.

I have an Ace-high with a gutshot straight draw and some showdown value, so taking a free card in position is high EV.

My A9 makes pair of fives with an ace kicker on this board — it beats every unpaired hand at showdown but loses to any 66+ pocket pair or any T/7/4/5. Betting only folds out air while getting called by better, so checking is clearly best; I can call a small river bet if one comes.

We have Ace-high showdown value after checking back the turn. Checking behind avoids walking into a check-call trap or paying off better hands.

Ten-three offsuit is far too weak to open even from the button in 3-max; calling 100 with ten-high or raising into two blind defenders has negative expectation with no reads.

Button folded, so A7s is strong enough to isolate the big blind and take the initiative rather than complete out of position.

84s is too weak to defend profitably against a 3x open from the small blind.

Pocket queens are a premium hand on the button, so I raise to 3bb to build the pot and take the initiative rather than flat-calling.

4s2s is too weak to defend out of position from the small blind against a 3bb button raise.

84 offsuit is far too weak to call 200 more out of position against a button raise; folding preserves chips for better spots.

95 offsuit is too weak to open even from the button in 3-handed play.

On the button 3-handed, 96o is near the bottom of a standard opening range, but position and fold equity make a small open more profitable than folding; I can release cheaply if pressured.

63 offsuit is too weak to continue against a button open; folding saves chips.

75 offsuit is too weak to defend against a 3bb open from the button.

Pocket sixes on the button is a clear open. A raise to 300 builds the pot in position and can take it down preflop or continue profitably.

92o is an unplayable hand out of position facing a button open.

J5o is far too weak to defend even the small 200 to call in position against a button open; folding is best.