Open K8o from SB, mix flop c‑bet/check; once BB check‑raises turn on a flush board, Kd8h has enough equity to justify calling off.
Flop T‑6‑4 with two diamonds: we have K‑high with a backdoor flush draw and a small range advantage. Solver leans toward checking this combo often, but a small c‑bet is a reasonable mixed line. The 2.3BB sizing is fine—applies pressure to BB’s weaker holdings and draws without overcommitting.
Turn 3d brings the third diamond and completes the flush; with SPR ≈1.6, BB’s range is heavily weighted toward made flushes and strong draws. Our Kd blocks the nut flush and some natural bluffs, so we have some bluff‑catcher value. After betting small and getting check‑raised, we’re getting about 3.3:1 and need ~23% equity; with a live flush draw and some showdown value, calling off is reasonable.