8♠7♠ BB vs BTN, turn on J♣ 8♦ 5♠ Q♠, 105 bb

Best play: Raise

Why

The Q♠ turn brings a spade flush draw to hero's 8♠7♠ on J♣8♦5♠Q♠ (5♠ and Q♠ on board plus two spades in hand make a nine-out draw), and hero also holds middle pair (eights). The Q is an overcard that hits the IP BTN's broadways, but hero's pair-plus-flush-draw is exactly the kind of equity-rich hand that wants to play big. Check-raising as a semi-bluff applies maximum pressure OOP: fold equity against the BTN's missed and weak-made hands now, with a pair and nine flush outs as backup when called.

Key idea

Pair plus a fresh flush draw OOP is a prime check‑raise: you have fold equity now and improve to a strong hand when called.

Common mistake

Passively calling with pair-plus-flush-draw OOP surrenders fold equity and lets the IP BTN realize his overcards and control the pot.