While our top pair is strong, we must navigate carefully as the board texture shifts to favor the caller's range on later streets.
Checking is the preferred play with this specific kicker. While we have top pair, Q6 is a marginal value hand that benefits from protecting our checking range on a wet board.
Note: Betting is acceptable but checking is higher EV; our weak kicker makes this hand a better check-call candidate to keep the pot manageable.
The 9d is a difficult card that completes several straights (T8). Betting small is a viable mix, but checking remains a strong option to bluff-catch.
Checking is mandatory. The river completes the spade flush and multiple straights, turning our top pair into a pure bluff-catcher with very low equity.