Hold'em table

Button suited connector is a standard open; a 2.5bb raise builds the pot with position and fold equity.

K2o is far too weak to defend out of position against a button open.

Calling 150 into a 400 pot needs only ~27% equity, and J8s has enough equity against a wide button range in 3-max to defend the BB cheaply and evaluate the flop.

J8dd on a paired 993 board has only gutshot and backdoor flush equity; checking realizes cheap equity heads-up against the preflop raiser, who likely continues heavily with 9x and overpairs.

45hh has no pair and no real draw on a paired board, so checking behind avoids bloating the pot with almost no equity.

J-high has essentially no showdown value, and my BB range covers nines far better than a preflop raiser who checked back this dry flop. A half-pot stab should fold out missed overcards often enough to be profitable, and I can easily fold if raised.

Bottom pair with a weak kicker is too thin to continue against a turn bet on a paired board after the flop checked through. Calling needs more equity than this hand realistically has, and raising would only inflate a pot I am likely losing.

A9s is well within standard opening range on the button 3-handed; raising to 2.5bb for value and position.

T2 offsuit is nearly the worst hand in the deck, and facing a 2.5x button open out of the small blind I have no equity edge or fold equity worth 200 more chips. Folding is clearly the maximum-EV play.

J9 offsuit is too weak to continue out of position against a button open; folding avoids a dominated spot.

On the button 3-handed, J9o is within a standard opening range; a 2.5x open pressures the blinds and I can fold to resistance with a marginal hand.

Q5 offsuit is too weak to continue out of position against a button raise, so folding is the highest-EV option.

64o is far too weak to defend out of position against a button raise.

K8o is playable as a button open in three-handed poker; raising builds the pot and takes the initiative rather than limping or folding.

Folding 42s in the small blind against a button open as it lacks sufficient equity and playability out of position.

K7s is well within standard opening range on the button in 3-handed play. Opening to 2.5bb is standard.

A8o out of position against a button raise is a marginal hand with poor playability; folding avoids a tough spot and preserves chips for better opportunities.

QJo has enough equity against a button open to defend the big blind, and the price is only 150 into 400. Calling keeps the pot manageable rather than bloating it with a marginal offsuit hand.

Top pair with a decent kicker on a wet flop; a small value bet charges club draws and weaker queens while keeping the pot manageable.

I have completely missed this monotone flop with no pair and no club redraw facing a donk bet.

A7o on the button 3-handed is a standard open-raise for fold equity and positional advantage; 3x keeps pressure on the blinds without committing the stack.

Pocket fours are worth a call against a button open in three-handed play; a 3-bet out of position risks getting blown off a hand that plays fine as a set-mine or small-pair call.

Getting 3.5 to 1 pot odds with suited Ace-six multiway out of the big blind makes calling clearly profitable.

Pocket fours are a weak pair on a king-jack flop, and I am out of position against the preflop raiser. Checking keeps the pot small and lets me see how the other two play.

I hold Ace-high with no direct draw on a king-jack high board in a multiway pot; checking to the preflop raiser is standard.

I was the preflop raiser and both opponents checked through on a K-high two-tone flop, which usually signals weakness. A ~55% pot continuation bet with ace-high plus a backdoor club draw has strong fold equity and can still improve.

Pocket fours is an underpair to both the jack and king, and the button's flop bet into two players is too strong to continue with this weak pair. Folding avoids putting more chips in with little equity and a player still to act behind.

I have ace-high with no draw on a high board that heavily hits the button's opening range; an easy fold facing a half-pot c-bet.