Hold'em table

75o is too weak to open from the button into two live players; folding avoids a dominated, low-equity spot.

I hold AK suited in the small blind after the button folded; raising to 3bb is standard to build the pot and apply pressure on the big blind.

7-3 offsuit is nearly the worst hand in the deck, and facing a 3x raise from the small blind I have no pot odds or playability to justify calling 200 more. Folding is clearly the maximum-EV line.

Raising to 2.5bb on the button with T8s is standard for value and positional advantage in 3-handed play.

Ace-three offsuit is a weak, dominated hand out of position against a button raise, with the big blind still left to act. Folding avoids playing a marginal hand with poor playability.

4-6 offsuit is too weak to call a button raise out of position; folding avoids a dominated spot.

On the button in a 3-handed game, J7o is within a standard opening range; I raise for fold equity and positional advantage rather than limping into a pot out of position postflop.

78 offsuit is too weak to continue from the small blind against a button open, especially out of position. Folding avoids a dominated, low-equity spot.

Holding 53o out of position facing an open raise is an easy standard fold.

79o is a marginal button open in three-handed play; a small raise uses position and fold equity better than limping.

7c 2h is the worst starting hand in hold'em; folding out of position to a button raise is standard.

T7o is a weak hand facing a 2.5x button raise out of position; it's often dominated and plays poorly postflop, so folding is the best EV play despite the small call amount.

On the button with King-Queen suited, open-raising to 2.5x is standard for value and position.

Pocket threes are a cheap set-mine against a 2.5x button open with ~100bb effective stacks; the 2bb price gives good implied odds, and I can fold cheaply if the big blind squeezes. Three-betting this hand out of position is too weak.

Q6 offsuit is too weak to continue out of position against a button raise and a small-blind call. Folding avoids paying 150 into a multiway pot with a dominated, poorly connected hand.

I have two overcards and a gutshot without a diamond on a monotone board, so checking back controls the pot and takes a free card.

Pocket threes without a diamond are nearly worthless on a four-diamond board; any aggressive action from seat_2 likely beats me, so I keep the pot free and plan to fold to a bet.

I do not hold any diamond blockers on a four-flush board, making a bluff risky against any random diamond in villain's range, so taking a free card is preferred.

We hold King-high with no diamond on a four-flush board, giving us essentially zero showdown value. Betting half pot exerts pressure on non-flush hands and capitalizes on passive action.

K8s is a solid suited hand on the button in 3-handed play; raising to 3x applies pressure on both blinds and can win the pot preflop or build with position.

75 offsuit is too weak to continue against a button open, especially out of position as the small blind. Folding avoids putting more chips in with a dominated, low-equity hand.

Holding J6 offsuit out of position against a 3bb button open is a clear fold.