Hold'em table

Pocket pair on the button, raise for value and to build a pot while isolating blinds.

QTs is playable enough to continue against a single button raise, and calling keeps the pot manageable with the big blind still to act.

J4 offsuit is too weak to defend the big blind against a 3x button raise and a small blind call; folding saves chips out of position.

Queen-ten has no pair, draw, or showdown value on a paired jack flop against the preflop raiser, so checking is the highest-EV line.

I have only a low pocket pair with no equity on this jack-high board; checking controls pot size against a caller who may have hit the Jack.

I have queen-high with no pair or draw on a paired board, so checking keeps the pot small and sees a free river.

I only have a weak underpair with no real equity; opponent's passive line could still include a jack or slowplayed hand, so I'll take a free card to showdown cheaply.

I only have queen-high with the board pair of jacks and no spade, so there is no value in betting. Checking keeps the pot small against the preflop raiser.

I hold two pair, jacks and fours, which is likely best against a passive caller who has checked every street; a value bet of about half the pot should extract value while limiting risk against a possible slowplay.

Queen-high with no pair or straight on a paired board loses to almost any value bet, and 400 is too much to call with air.

K5o is too weak to limp or open from the button; it is easily dominated and plays poorly against continuing ranges, so folding preserves chips.

Only 50 more to complete heads-up in the blinds, giving good pot odds with 6-4 despite being out of position postflop.

K9 offsuit is a reasonable hand to raise for value against a limper, and I'll have positional advantage postflop.

4-6 offsuit is very weak facing a big blind 3x raise heads-up out of position; calling 200 more has poor equity and playability.

T6 offsuit is too weak and poorly connected to invest from the button against the blinds in a 3-handed pot.

6-9 offsuit is weak; folding to save chips heads-up against BB when button already folded.

J3 offsuit is a weak hand not worth entering a 3-way pot with a raise or call from the button.

Button folded, so I am heads-up with the big blind holding KQs. A standard 3bb raise builds the pot with a strong suited hand and takes the initiative.

J6 offsuit is too weak to defend the big blind against a small-blind raise to 300, even in position postflop; folding preserves chips.

K7o is a standard button open in three-handed play; a small raise builds the pot with position and fold equity.

KJo is strong against a wide button open in 3-handed play and plays poorly out of position in a multiway called pot, so 3-betting isolates and applies pressure.

42o is a trash hand facing a big raise and a 3-bet to 900; folding is clearly correct here.

K7o is too weak to continue against a 3-bet; calling 650 more is unprofitable versus a typical reraising range.

On the button with a suited hand, calling one big blind offers good pot odds and postflop position against both blinds, giving enough equity realization to justify seeing a flop.

Qd7s is weak but I'm getting great odds (call 50 into 250 pot) with two others already in, so I'll complete cheaply and see a flop.

T4o is too weak to raise from the big blind after limps, and checking is free, so I take the flop.

Qd7s has no pair, no draw on a 3-9-9 board; checking to avoid committing chips with weak holding.

T4 offsuit has no pair or draw on a paired flop, and checking is free with seat_3 still to act.

With two pair, nines and threes, on a limped flop checked to me in position, I bet for value and protection against overcards and the diamond draw.

Qd7s has no pair, no draw on a 3-9-9 board; small bet but no equity reason to continue.

T4 has no pair and only a backdoor diamond draw on a paired flop, so calling 200 into 500 is unprofitable against a bet.