Flop Analysis
Checking back the nut flush draw after the 3‑bettor checks is perfectly fine in a mixed strategy; our combo happily realizes equity, and we don’t need to auto-stab just because we have a strong draw.
Preflop is too loose, but postflop we play the nut flush well overall; just tighten the preflop flats and use cleaner, SPR-aware sizing.
Checking back the nut flush draw after the 3‑bettor checks is perfectly fine in a mixed strategy; our combo happily realizes equity, and we don’t need to auto-stab just because we have a strong draw.
Once we turn the nut flush after double-check from the 3‑bettor, betting is mandatory; sizing down slightly (around half-pot) would align better with how the range wants to build the pot. **Ranges:** Our hand is at the very top of range now (nut flush, no full houses possible yet), while BB’s check‑check line is heavily weighted to one-pair, weak two-pair, and some slowplays. We want a value bet that can still be called by Kx, Qx, sets, and lower flushes. **Sizing:** Solver strongly prefers a ~50% pot bet with this combo; our ~75% pot size still prints value but slightly over-polarizes range, making it easier for marginal hands to find folds and not ideal for building a robust, multi-street value range. **SPR:** With an SPR just over 3 at street start, a half‑pot turn bet and jam river line smoothly gets money in without over-stressing villain’s marginal continues. --- > **Takeaway:** With the nut flush in position and stacks behind, bet for value but choose coherent, geometric sizing rather than an unnecessarily chunky turn stab.
Note: Betting is correct but the 75% pot sizing is larger than needed; a ~50% pot size is more efficient for the range and still sets up a clean shove on many rivers.
On the paired, four-spade river, our nut flush remains extremely strong but no longer invulnerable; with SPR ≈ 1, effectively jamming over villain’s check is still the right idea, even if the interface shows a slightly over-pot size that gets cut back to all-in. **Board:** The queen pairing introduces full houses and quads, and the fourth spade means villain only needs a single spade to have a flush; that said, many of those one-spade continues are worse flushes, and plenty of Kx/Qx without a spade are now in tough spot versus a shove. **Ranges:** BB’s passive line (check flop/turn/river) caps them away from most boats and straight flushes; a lot of their continuing range is Kx with or without a spade, Qx, and non-nut flushes, against which our nut flush prints by betting big. **SPR:** With pot ~44BB and villain ~45BB behind, SPR is just over 1; this is a classic “commit with very strong hands” configuration, and using an effective shove extracts maximum value from all worse flushes and sticky Kx/Qx. --- > **Takeaway:** At low SPR with the nut flush on a scary paired four-flush board, we should still shovel the money in versus a capped, passive range and let villain make the tough call/fold decision.