Q♠J♠ BB vs SB, turn on Q♣ 8♦ 4♠ 2♠, 75 bb

Best play: Overbet 120% pot

Why

Turn (Q♣ 8♦ 4♠ | 2♠). Hero is IP in the BB against the SB's capped check; with Q♠J♠ hero holds top pair queens plus a live spade flush draw (Q♠ and J♠ behind the 4♠/2♠), a value-plus-equity combo that wants to grow the pot. Against a capped range that cannot hold sets or 2-pair often, the overbet charges worse Qx and all the gutshots/flush draws while keeping a near-nut spade redraw if called.

Key idea

On the turn, a strong made hand carrying a redraw (top pair + flush draw) is an ideal overbet: you get value now and have equity to fall back on when called.

Common mistake

Betting small or checking back the turn, which fails to charge the many draws in the capped range and forfeits value from worse top pairs.