55 SB on 863r: Navigating a Four-Flush River

Hero
5♦5♥
Position
SB vs HJ
Pot
Single-Raised Pot
Flop
3♠ 6♥ 8♠

We correctly defended preflop and bluff-caught the flop, but our river value bet with trips was thin given the four-flush board.

Flop Analysis

Checking is standard. While we have a range advantage on this low board, 55 functions best as a check-call to protect our range.

Flop Analysis

Calling is the most profitable play. We have enough equity against a wide HJ continuation range and need to defend our better underpairs.

Turn Analysis

The Queen of spades is a terrible card for us as it completes the flush and hits the HJ's range. Checking is mandatory to control the pot. **Board:** The third spade and the overcard shift the advantage back to the HJ, who has all the nut flushes (AsXs) and sets of Queens. **Ranges:** Our range is condensed to bluff-catchers and draws, while the HJ remains uncapped. By checking, we allow them to check back their marginal hands or continue bluffing with air. --- > **Takeaway:** When the turn completes the most obvious draw and brings an overcard, check your entire range to the aggressor.

River Analysis

While we improved to trips, the four-flush board makes betting extremely thin. Checking is preferred to induce bluffs or get to a cheap showdown. **Ranges:** HJ checked back the turn, which caps them, but they still hold every single spade in their range. By betting, we risk value-owning ourselves against any random spade (like AsJx or KsTx) that they will never fold. **Blockers:** We don't hold a spade, which is actually a negative for betting. It means the HJ is more likely to have a spade to call us with, making our trips a pure bluff-catcher if they raise. **Sizing:** If we do bet, the small 33% sizing is the only way to go. It targets weak pairs or 8x that might feel curious, though most of those hands will still struggle to call on a four-flush runout. --- > **Takeaway:** On four-flush boards, even strong made hands like trips function better as checks since Villain's calling range is dominated by flushes.

Key Concepts

  • Multi-Street Play
  • Hero Strong Advantage
  • OOP
  • Semi-Wet Board
  • LEAN TOWARD AGGRESSION