We missed a significant value betting opportunity on the river after turning a flush on a four-spade board.
Betting small is the preferred play here. We have a massive range advantage on this broadway-heavy monotone texture, and our specific hand has a spade redraw to the flush.
Note: Checking back misses an opportunity to deny equity and leverage our range advantage on a board that hits our 3-betting range hard.
Checking back is correct once the fourth spade hits. While we have a flush, the 4-flush board is extremely polarizing, and checking allows us to realize our equity without getting blown off the hand by a check-raise.
Checking back the river is a significant mistake. We have a flush on a board where HJ has checked three times, making it highly likely we have the best hand. We must bet for value. **Ranges:** HJ's range is capped after checking three streets. They will have many two-pair hands like AdQd or KdQd and sets that are forced to bluff-catch against our polarized betting range. **Blockers:** Our 6s is a crucial card; it doesn't block the HJ's likely calling range (like the As or Js would), meaning they are more likely to hold a single spade and feel obligated to call a bet. **Sizing:** A medium to large sizing (60-100% pot) is optimal here. We want to target the top of HJ's non-flush range, such as Ax or Kx with a small spade, which will struggle to fold to a single bet after the action went check-check. --- > **Takeaway:** When you have a strong made hand like a flush and your opponent caps their range by checking three times, you must bet for value rather than checking back.
Note: Checking back the river with a flush is a large value loss; we should be betting large to target capped one-pair or two-pair hands.