Hold'em table

Pocket fours on the button in a 3-handed game is ahead of wide blind ranges; raising takes initiative and can win the blinds or build a pot in position.

Queen-ten offsuit has enough equity against a wide button open in three-handed play to continue, and calling keeps the price reasonable out of position.

J4 offsuit is weak, facing a raise and a call; not worth continuing.

Queen-high with no pair or draw on a paired jack flop; checking is free and avoids bloating the pot out of position against the preflop raiser.

In position on a dry paired board, a small c-bet protects my pocket fours, represents a Jack, and can fold opponent overcards cheaply.

Queen-high with no pair or draw on a paired jack board is too weak to continue against a flop bet. Folding saves chips for a better spot.

K5o is too weak to call or open from the button; folding avoids dominated spots and poor postflop play.

4-6 offsuit is weak; button folded, but facing BB who may come over the top. Not worth defending with a trash hand heads-up vs BB.

6s-Th offsuit is a weak hand from the button facing a raise-like structure with two players already in; folding preserves chips for better spots.

6-9 offsuit is a weak hand out of position against the big blind; calling or raising would likely lose more than folding the small blind.

J3 offsuit is too weak to call or raise from the button in a 3-handed game; folding preserves the stack versus dominated ranges.

KQs is strong heads-up versus the big blind after the button folds, so I raise to 3bb to build the pot and take the initiative.

J6o offsuit is weak and facing a raise with no pot odds justification; folding is standard.

Button with position in a three-handed pot; K7o is a marginal steal, so a small open is better than limping.

4-2 offsuit is among the weakest hands and is out of position against a button raise; calling 150 does not offer enough equity or playability to justify defending.

Button with weak offsuit low-card hand (3s Ts) facing a raise to 100; not worth playing out of position value, fold is standard.

Q7o has good equity heads-up against the big blind's wide forced range, and calling 50 into 150 gives excellent pot odds to see a flop.

T4 offsuit is too weak to raise, and the small blind has only limped, so I check and see a free flop.

With queen-high, only a backdoor flush draw and one overcard on a paired board, checking keeps the pot small and realizes equity cheaply against the big blind's wide checked range.

T4 has no pair or draw on a paired flop, so checking keeps the pot small and realizes whatever showdown value remains.

Turn completes three diamonds and I hold the Qd, giving me a flush draw plus a strong blocker to represent the made flush. A pot-sized bet can fold better non-diamond hands while I still have river equity if called.

Ten-high with only a diamond flush draw does not have the equity to call 200 into a 400 pot, and a raise bluff is poorly placed against a turn bet on a paired, three-flush board.