A♠Q♠ SB vs BTN, river on K♠ T♥ 7♠ 6♣ 2♠, 100 bb

Best play: Overbet 120% pot

Why

River, K‑T‑7‑6‑2 with three spades on board (K‑7‑2 of spades). Hero is out of position as SB and leads first. Counting suits: hero's A‑Q of spades plus the three board spades make five spades, so hero has the nut flush, ace-high. Against a capped BTN that cannot hold a higher flush, the overbet lead is pure value: it charges worse flushes, sets, and straights the maximum, and there is no draw left to fear.

Key idea

Always count all five board cards for suits: three spades on board plus two in hand is a made flush, not ace-high. With the nuts and no draws left, overbet for maximum value.

Common mistake

Misreading the nut flush as merely 'ace-high' and checking it, or under-sizing and leaving money on the table with the absolute nuts.