Part: Part Six - Betting After the Flop

Sizing to the board

Pre-flop
Blinds 100 / 200Pot 300 (1.5 BB)COKQ 25,000 (125 BB)YOUfolded to youSB 25,000 (125 BB)posts 100 (0.5 BB)BB 25,000 (125 BB)posts 200 (1 BB)D

Folded to you on the cutoff with K♠Q♠; you raise and the big blind calls.

Folded to you with K♠Q♠. Best?

WhyOpen-raise. K-Q suited is a clear cutoff open.
What happensYou raise to 500; the big blind calls.  Pot: 1,200 (6 BB).
Flop
Heads-upPot 1,200 (6 BB)Q94COKQ 25,000 (125 BB)YOUtop pair on a wet boardBB 25,000 (125 BB)Big blindchecksD

Flop Q♥ 9♥ 4♣ - top pair, but the board is wet (flush and straight draws live). He checks.

Top pair on a draw-heavy board, he checks. Best size?

WhyBet larger. On a wet, draw-heavy board your top pair wants a bigger bet (~3/4 pot) to charge flush and straight draws and build the pot - a small bet gives draws a cheap card. On a dry board you'd size down; the texture sets the size.
What happensYou bet 900; he calls.  Pot: 3,000 (15 BB).
Turn
Heads-upPot 3,000 (15 BB)Q942COKQ 25,000 (125 BB)YOUtop pair; the draw missedBB 25,000 (125 BB)Big blindchecksD

Turn 2♠ - the draws miss. He checks again.

The board bricked and he checks. Best?

WhyBet again. You're still ahead and any remaining draw should pay; a second solid bet extracts value and denies free cards.
What happensYou bet 1,800; he folds.  You take it.
You sized your bets to the board - big on the wet flop to charge draws, then kept betting when they missed. Board texture, not just hand strength, sets your bet size.

Bet bigger on wet, draw-heavy boards and smaller on dry ones - size to charge the draws your opponent could hold.