Hold'em table

T9s is a playable suited connector on the button, so I open to 2.5bb rather than limp or fold.

J3 suited is too weak to defend from the small blind against a button open in a three-handed game.

Q6 suited in the big blind facing a 2.5x button open with 150 to call into a 400 pot gets good odds; it's a standard defend heads-up in position disadvantage but with suited playability.

Q6 offsuit with no heart on a monotone board is weak; checking to the preflop raiser is standard and avoids bloating the pot with air.

I have top pair on a checked monotone flop and a half-pot bet gets value from worse pairs while denying free equity.

Queen-high with no heart on a monotone flop; no draw and no showdown value against a button open and c-bet, so folding is the clear play despite the cheap price.

7-4 suited is too weak to open from the button in this short three-handed structure.

Button folded, so it's SB vs BB heads-up. Q2 suited is a standard raise from the small blind against one opponent; raising to 3bb takes initiative and plays well in position-less blind battle with fold equity.

67o is too weak to continue out of position against a 3bb open; folding saves chips.

7-8 offsuit on the button in a 3-handed game is a reasonable open-raise; 2.5x sizing takes initiative and position against the blinds.

Q6 offsuit is too weak to continue from the small blind against a button open; folding avoids a dominated, poorly connected hand out of position.

3c5s offsuit is far too weak to defend against a button raise, especially out of position heads-up.

T3o is too weak to call or raise from the button against two live opponents, so folding preserves the stack.

Complete the small blind with a moderately playable suited-gap hand and realize equity cheaply heads-up.

8-4 offsuit is weak; SB limped and I have the option to check for free in position-less BB spot. Checking realizes equity cheaply rather than bloating the pot with a raise.

A small continuation bet on this paired ace-high board can fold out many missed hands while risking little. Our eight-high has limited showdown value.

8-high with no pair or draw on a K-K-A board facing a half-pot bet; folding is clearly correct with essentially zero equity.

7-high offsuit is too weak to profitably enter against both blinds at this stack depth.

Button folded, so it's SB vs BB heads-up; pocket eights are a clear value raise from the small blind. Raising to 3bb builds the pot with a strong hand against one opponent.

95o is too weak to continue out of position against a small-blind raise after the button folded.

5-3 offsuit on the button is well below a profitable opening range even in 3-handed play; folding preflop loses nothing.

J4 offsuit is too weak to continue out of position against the big blind after the button folds. Folding avoids putting more chips in with a dominated hand.