River 5♣: MP checks

The math

GTO answer: Bet 20bb

Nut flush after the board ran out 4-to-a-spade. The only hand that beats us is exactly the royal-flush draw or a higher single spade we already block. MP's flat on a 4-flush turn is a flush almost always. Bet 20bb, slightly over half pot. We get called by every other flush. Thin value bet.

Tags: river MW nut flush thin value