Hold'em table

Pocket nines is a solid hand to play from the button. Raising to 3x the big blind (300 chips) is standard to take down the blinds or build a pot with a profitable hand against two opponents.

Holding AJs in the small blind against a button open, raising to 11 bb is standard for value and positional disadvantage mitigation.

QJo is a marginal hand that plays poorly out of position against a small blind 3-bet, with high reverse implied odds and deep stacks; folding preserves chips for more favorable situations.

83o is too weak to open even from the button in a 3-handed game.

A8o is a strong hand heads-up against the big blind after the button folded. Raising to 300 builds the pot with an equity advantage and pressures the BB to fold or call out of position.

5-3o is a very weak hand with no strength. Facing a 3x raise from the small blind after already posting the big blind, folding is the correct play. The risk-reward does not justify calling with this trash holding.

K9o has decent equity and playability on the button in 3-handed; raising to 250 puts pressure on the blinds and allows me to take initiative post-flop.

In a 3-handed game against a button open of 2.5bb, J6s has sufficient equity and playability getting favorable pot odds of 2.7 to 1 to defend from the big blind.

Check to the preflop raiser on an Ace-high dry board where they retain a significant range advantage, keeping pot controlled with second pair.

Continuation bet to represent the Ace on a dry board, hoping to fold out hands like small pairs or missed broadways.

Facing a small bet of 200 into 550 on an A-high dry board, middle pair with a decent kicker has sufficient equity against the button's wide c-betting range to call comfortably.

Check with third pair out of position to control the pot size and see what the opponent does.

I have only king-high with no draw on an ace-high board after being called on the flop. Taking the free river card in position is better than bluffing against a range that likely contains an ace or pair.

I have third pair with decent showdown value against missed floats, so checking to realize equity at showdown is the best line.

I have only king-high with no draw; opponent's flop call suggests they may have a pair or ace, and a river bluff would need too much fold equity. Checking behind lets me realize what little showdown value I have.

7-9 offsuit is a weak hand in early position facing a big blind raise. Folding preserves chips and avoids playing out of position with poor equity against likely stronger holdings.

Q6o is too weak to profitably open or complete blind vs blind.

J4o is too weak to open from the button 3-handed. Folding is standard.

T4s is a marginal hand that plays poorly out of position against the big blind, so folding is the most prudent choice despite the 3:1 pot odds.

92s is a very weak hand, even in a 3-handed game with no antes, and folding avoids risking chips with a hand that has poor equity and playability.

3c-Qd is a weak hand in heads-up preflop play. I'm out of position as small blind with only queen-high and a poor kicker. Folding minimizes losses with a marginal hand.