Hold'em table

75o is a marginal, near-zero-EV button open with two players left to act behind, so folding avoids playing a weak offsuit hand out of position against blind defends and 3-bets.

Ace-king suited is a premium hand heads-up. Raising builds the pot while applying pressure to the big blind.

7♥3♣ is a very weak offsuit hand and the raise leaves poor pot odds from the big blind. Fold rather than continue out of position.

A3 offsuit is strong enough to open heads-up from the small blind. Raising builds initiative and can win the pot immediately while pressuring the big blind's wide range.

Getting 2:1 in position against a wide small-blind steal range, 64o has enough equity and playability to defend by calling.

With ace-high and only a backdoor heart draw, checking keeps the pot small and lets me see a turn without investing more.

Six-high with only weak backdoor draws on a Q-T board that favors the preflop raiser's range. Taking the free card in position is better than bluffing.

The king is favorable for my preflop raising range, and I have a gutshot to Broadway. A modest turn bet applies pressure while keeping the bluff inexpensive.

I have 6-high with only a gutshot (a 3 doesn't even make a straight here, since 3-4-5-6 needs a 7 or 2) and no real draw on a board that hits raisers, so calling 300 into 900 isn't justified. Folding.

J♦7♠ is a reasonable button open in a three-handed game. Raising to 2.5 big blinds applies pressure to the blinds while keeping the pot manageable.

87o from the small blind facing a 2.5x button open, with the big blind still left to act, is a clear fold. Calling out of position with an offsuit connector is unprofitable here.

53 offsuit is too weak to defend out of position against a 2.5 BB button raise.

On the button in a 3-handed game, 97o is a standard open-raise, since it plays well in position and can win the blinds outright.

7-2 offsuit is too weak to call a button raise from the small blind, especially with the big blind still to act.

T7 offsuit is marginal out of position, but the button’s small open and the pot odds make a check-back style defense worthwhile. Calling keeps the pot manageable without turning this weak hand into a bluff-raise.

I have only a weak gutshot and backdoor flush potential on a paired board, so checking keeps the pot small and lets the preflop raiser act.

With an open-ended straight draw plus a nine overcard in position on a paired board, a small c-bet of about a third of the pot is a strong semi-bluff that can win the pot right away and keeps initiative.

Call with the gutshot and backdoor flush potential; the price is reasonable, while raising would be too ambitious with this marginal draw.

My hand has only a modest draw to a straight and otherwise relies on the shared trips on board. Checking keeps the pot small and lets me see the river without investing more.

We have an open-ended straight draw with weak showdown value, and villain calling the flop likely holds a pair or better that won't fold, so we take the free card to realize our equity.

The board already makes trip eights, and my T-7 kickers have some showdown value against weaker holdings. A river bet is unlikely to fold out many hands with higher kickers, so I’ll check.

My 9-high straight beats missed draws, 7x, 9x and high-card hands that check-called, but any 5, 6, pocket pair or 8 makes a full house. A small thin value bet gets called by worse hands while risking little against boats.

The small river bet needs only modest equity, and my ten kicker can beat some missed-draw bluffs or low-card bets on this paired board. I’ll bluff-catch rather than fold automatically.

KQ suited is a strong button opening hand three-handed. Raising to 250 builds the pot while retaining position.

Calling at favorable pot odds with a small pair and deep effective stacks; a three-bet risks isolating against a stronger range, while folding is too tight here.

Getting 4:1 in the big blind, Q6o has enough raw equity to call multiway despite playing out of position. It's too weak to 3-bet against an open and a call.

With only a small pair on a connected, three-diamond flop in a multiway pot, betting has little value and is likely to be called by stronger hands or draws. Check and avoid building the pot.

Bottom pair with no diamond on a monotone, connected board is weak in a three-way pot. I'll check and let the preflop raiser act, keeping the pot small.

On a monotone flop against two opponents, K-Q has a gutshot but no diamond. Checking takes the free card and avoids building a pot with a vulnerable draw.

With a low pair and no diamond on a four-diamond board, betting into two opponents is unlikely to succeed and risks being raised by a flush. I’ll take the free card and preserve my showdown value.

With four diamonds on board, my bottom pair and no diamond has little showdown value and blocks nothing, so betting is unprofitable. I'll check and see the river for free.

With no diamond on a four-diamond board and two opponents still in, a turn bluff is unlikely to get enough folds. Checking preserves the chance to improve on the river.

Both opponents checked through the flop and turn, so a small river bluff may fold out hands without a diamond. A modest 250-chip bet risks little relative to the pot.

Bottom pair with no diamond on a four-flush board that also completes several straights is very weak against a river bet. Seat_2 can still act behind me, so even the cheap price isn't enough to call.

King-high with no diamond is unlikely to beat a river bet on this four-diamond board. The small price does not justify calling against the many pairs, straights, and flushes available.

K♠8♠ is a playable button hand in a three-handed game, and raising applies pressure to the blinds while taking initiative. A 2.5bb open is a reasonable size.

75o from the small blind facing a button open, with the big blind still to act, is too weak to call out of position or 3-bet profitably.

J6 offsuit is a weak, easily dominated hand that plays poorly out of position against a button raise.