Hold'em table

K3 suited on the button 3-handed is a reasonable steal/raise spot; sizing to 2.5x to build pot and pressure blinds.

J5 offsuit is too weak to continue from the small blind against a button open, especially with the big blind still to act. Folding avoids putting more chips in with a dominated, poorly connected hand.

Jc6c is a weak hand that struggles against a 2.5bb open raise from the button. Folding preserves my 100bb stack for better spots.

J2o is too weak to open from the button even in three-handed play, so folding is the highest-EV option.

4d3d is a weak hand to defend the small blind with a raiser behind; folding preserves chips for better spots.

I hold 6s7d on the button with no prior investment; this is a weak speculative hand that does not justify calling a 100 chip big blind raise, so folding preserves my stack.

Pocket nines heads-up vs BB, raise for value to build pot and isolate.

Q7 offsuit is too weak to continue against a 3x open, even in position. Folding avoids a dominated spot with poor equity and reverse implied odds.

KJo on the button is a solid opening hand 3-handed; raising to isolate and take initiative.

ATo is strong enough to continue versus a button open, but not strong enough to 3-bet out of position with the big blind still to act. Calling keeps the pot manageable and realizes equity.

With Qd5h on the button facing a 250 raise and 150 to call, the hand is too weak to continue; folding preserves my 100bb stack for better spots.

Middle pair with an ace kicker is too vulnerable to lead out of position into the preflop raiser on this connected queen-high flop. Checking controls the pot and lets me react to their action.

I hit the nut king-high straight on this flop (Jc+Ks with Th9cQc); I should bet for value and protect against club/backdoor draws.

I have second pair with an ace kicker and the price is right against a single continuation bet, so calling is better than folding or raising out of position on this connected board.

Second pair with an ace kicker has some showdown value, but the queen-high board with straight and flush possibilities is too dangerous to bet into the preflop raiser. Checking keeps the pot controlled and lets me reassess on the river.

I flopped a straight (9-T-J-Q-K) and want to build the pot for value while charging draws like clubs.

I have a pair of tens plus a club flush draw and two pair/trips outs, so calling 900 into 2300 is justified by the price. Raising into the aggressor is unnecessary when my equity is mostly realized by seeing the river.

I have only a pair of tens with an ace kicker on a king-queen board, so a river bet is too thin and a check-call is unattractive against the prior aggressor. Checking realizes the hand and avoids building a pot I am often behind in.

I completed a strong straight (9-T-J-Q-K) which beats most of villain's likely holdings; betting for value while keeping size moderate in case a flush got there.

I have only third pair on a straight-heavy board against a triple barrel, and the price does not justify a bluff-catch.

T2 offsuit is too weak to call or raise even on the button in a three-handed pot. Folding avoids putting chips in with a dominated, disconnected hand.

With only Tc-4d, I have no pair and no draw, and the small blind has already put money in. Folding avoids losing more chips on a weak hand.

I have 2c Kd on the button with no action yet. The pot odds don't justify calling 100 to see a flop with this weak hand, so I'll fold to preserve my stack.

Heads-up vs BB with Ace-high, a standard raise builds the pot and applies pressure since the button folded.

K6o is too weak and offsuit to continue against a 2.5bb small-blind raise, even heads-up. Folding avoids a dominated, low-playability spot.