River

You're on the button with A-hearts 5-hearts. Flop comes K-hearts 9-hearts 4-clubs: nut flush draw, 9 outs. Turn is the 2 of diamonds, no help, so you take one card to a make-or-miss spot at about 19.6% — 9 outs out of 46 unseen cards. Dealer burns and turns the Q of hearts. Nut flush. Big blind checks, you bet two-thirds pot, get called by two pair, and rake it.

That's the river. No more outs, no more if-I-hit-this. The hand is locked, and everything now is about reading strength, not building equity. Sizing and story matter more here than on any earlier street, because a river bet is value or bluff — nothing in between. There's no semi-bluff once the last card is down; no card left to bail you out. Position still pays: last to act, you watch the big blind check before you decide whether that flush is worth a real bet or a feeler.

The beginner mistake is treating the river like one more betting round instead of the point where the hand stops changing. Players call off a stack with a busted draw because they already put money in on earlier streets, not because the bet in front of them makes sense against what the other player is repping. Chips already in the middle don't owe you a call. Only your hand against their range does.