Iso pre, small flop c-bet is fine, turn check-call is good, but river should be a small block or check rather than a shove.
Flop Q94dd, pot 10.5BB, SPR ≈3.5. We have a weak pair with a club draw on a semi-wet, two-tone board. Solver slightly prefers checking this combo, but a small c-bet like 3.8BB into 10.5BB is a reasonable mix—folds out some overcards and random floats while still realizing our equity.
Turn 2c brings the second club and we now have a club flush draw plus a medium-strength made hand. With SPR <2, checking is the standard line—our hand is strong enough to continue, but we don’t want to face a raise with a marginal draw. Once SB bets 7.3BB into 10.5BB, we’re getting about 3.5:1 and need ~22% equity; with a pair plus a flush draw, calling is the natural choice.
River Qs pairs the board and we now have queens and fours with a missed club draw. SB’s range is polarized after betting turn, and we have a marginal bluff-catcher. Solver leans toward checking this combo, but a small block bet around one-third pot is a reasonable alternative—our hand is too thin to value-bet for stacks.
Note: Jamming river overplays the hand and runs into stronger queens and a flush; checking or using a small block bet is preferred.