Iso pre, small c-bet flop, check turn, and on the river we should check our queens and fours rather than shove into a very strong, condensed range.
Flop comes Q94 with two diamonds, giving us a weak underpair with a backdoor flush draw. Solver prefers a small c-bet or a check here; the small stab works well to pressure overcards and diamond draws while keeping the pot manageable with a marginal made hand.
Turn 2c brings a third club and improves us to a flush draw on top of our underpair. With SPR now under 2, checking is preferred: we protect our checking range and avoid turning a medium-strength hand into a bluff when we still have decent showdown value.
SB bets 7.3BB into 18.1BB, so we’re getting about 3.5:1 and need roughly 22% equity. With a flush draw and a medium-strength made hand, we comfortably have that and some showdown value, so calling is the natural response.
River Qs pairs the queen and we now have queens and fours with a missed flush draw. With SPR ≈0.8, we’re effectively committed and should check to induce calls from worse queens and diamond draws rather than jamming into a very strong, condensed range.
Note: Shoving river with queens and fours after SB has shown strength on the turn is overly optimistic; checking and letting SB bluff or value-bet performs better.