T♣8♣ SB vs BTN, river on K♠ T♥ 7♠ 6♣ 2♠, 100 bb

Best play: Overbet 120% pot

Why

Turn (K T 7, 6): hero is OUT OF POSITION in the SB and leads first. T8 pairs the ten for second pair AND holds an open-ended straight draw (any 9 or 5 completes 5‑6‑7‑8‑9 / 6‑7‑8‑9‑T), a strong semi-bluff combo on a draw-heavy board where the BTN range is capped. An overbet leverages that equity: it folds out better high cards and chargers worse pairs and draws, while keeping the nuts in hero's range from out of position.

Key idea

A made pair plus an open-ended draw is a premium semi-bluff; overbetting maximizes fold equity now and pot size when you hit.

Common mistake

Checking or betting tiny with a pair-plus-open-ender, surrendering the fold equity and the chance to build the pot for your strong draw.