Part: Part Six - Betting After the Flop

Check-raising for value

Pre-flop
Blinds 100 / 200Pot 1,300 (6.5 BB)BB87 25,000 (125 BB)YOUto actBTN 25,000 (125 BB)Buttonraises 600 (3 BB)SBfoldsD

A button opens to 600 and you defend the big blind with 8♠7♠.

Button opens; you hold 8♠7♠ in the BB. Best?

WhyA suited connector getting a discount to defend closes the action and flops the disguised hands - straights, two pairs, flushes - that win big pots. Three-betting bloats a pot out of position with a hand that would rather see a cheap flop; folding wastes its upside.
What happensYou call. Pot: 1,300 (6.5 BB).
Flop
Heads-upPot 1,300 (6.5 BB)872BB87 25,000 (125 BB)YOUtwo pairBTN 25,000 (125 BB)Buttonbets 800 (4 BB)D

Flop 8♦ 7♣ 2♥ - you flop top two pair. You check, and the button c-bets.

You flopped two pair out of position and he c-bets 800. Best?

WhyTop two is huge, but a heart, a nine, a six, a five, or an overcard can all cool it off by the river - so getting stacks moving matters now. Raise to 2,400 for value and protection: you charge the overcards and draws that floated his c-bet, whereas flat-calling invites a scary turn to land for free.
What happensYou check-raise to 2,400; he calls, the rest goes in on the turn, and your two pair holds. It would have been the right raise even if a flush card had cost you the pot.
You had top two on a board where turn cards could wreck you, so you raised for value and protection instead of trapping. Hands this good and this exposed cannot afford to give free cards.

Strong-but-vulnerable hands want money in now: check-raise them for value and protection rather than slow-playing and praying the board runs out clean.