Hold'em table

Opening with ATo on the button is a standard value raise in 3-handed play.

53o is trash facing a 2.5x raise out of position; folding is clearly best.

K6o is too weak and poorly playable out of position against a button raise, so folding is the higher-EV choice.

23o is too weak to call 50 more out of position against the big blind, so I fold and avoid putting more chips in.

K2o is too weak to call or raise from the button; folding avoids a dominated, low-playability hand.

In a blind-versus-blind scenario after the button folded, pocket fours is well ahead of a random hand, making a standard 3x open raise profitable.

Q2o is too weak to call a 3x raise out of position; folding saves 200 chips with minimal equity.

53s is slightly too weak to open profitably from the button even in 3-handed play.

AKo is a premium hand and heads-up against the big blind I should raise for value and initiative rather than just call the 50.

Button folded and the small blind opened to 3bb; A5s has enough suited-ace playability in position to continue. Calling 200 into 400 is better than folding or bloating the pot with a dominated ace.

Top pair top kicker on aCaller's likely range (pairs, Kx). Betting for value while protecting against draws.

Ace-high with only a backdoor spade draw has no pair or real equity against a continuation bet on K97. Folding avoids paying 400 into a pot I am unlikely to win.

King-high on the button with two players already in is a standard isolation raise; fold equity plus position makes this profitable.

A8s has an ace blocker and suited playability against a wide button open. A 10bb 3-bet takes the initiative out of position and can fold out the big blind.

KQo is dominated against a button open and a small blind 3-bet to 10bb, making this an easy fold out of position.

K4o is far too weak to call a 3-bet: any king I flop is likely dominated, and my equity against a reasonable 3-betting range is well below the ~25% needed to call 700 into 1400. Folding preserves chips for better spots.

93o is too weak to open even on the button in three-handed play; folding avoids dominated spots and a bloated pot.

King-Jack suited is well ahead of an average blind defense range, so raising to 3bb blind-versus-blind creates value and builds the pot.

K6 offsuit is far too weak to call 200 more against a 3x raise heads-up; folding is clearly optimal.