Iso-raising K8o is okay but not mandatory; check flop multiway, bluff-raise the tiny turn stab, and river shove with K8 two pair is thin but defensible.
Flop Qh-2d-4d rainbow, multiway, we have K-high with a backdoor flush draw and no real equity advantage; checking and letting the limpers act is standard. Solver prefers a lot of checking here, with some small bets mixed in—our hand is too weak to value-bet and too strong to fold, so checking and seeing what the limpers do is the right idea.
Turn 4c pairs the board, SB now leads 1BB into 9.5BB; with K-high and no real showdown value, we’re mostly bluffing. Solver prefers calling the tiny stab rather than raising, but a small raise can work as a bluff. The 9BB raise is a bit big for a bluff and risks isolating us against stronger hands, so a smaller raise or just calling is slightly higher EV.
Note: Turn raise is a bit too big for a bluff; a smaller raise or call is slightly better.
River 8d gives us K8 two pair on a paired, rainbow board; SB checks. Solver prefers checking here with this combo, but a polarized shove can be reasonable if SB is capped and will fold worse pairs and Kx. The shove is a bit thin but not a huge mistake—SB’s range is still fairly strong, so we’re targeting a narrow shove-calling range.