These hands I often wonder what should be the default line. I open BU and BB call. BB has been reggy looking but bit on tight side.
I cbet on really dry flop and villain call.

When BB call flop I assume him to have some 9x, 4x and overpairs. Maybe sometimes like 9TJQds type float. So I could check turn and try to get to showdown. But when I have 9 and not much overpair blockers I think his range is weighted toward overpairs and 4x+. So I kind of thought I dont really have that much showdown value really and went for 3/4 pot bet.

BB called turn and I would assume his range to be 4x and some overpairs with support like AQQxhh, QQJT. Some 9TJAhh possible also I suppose. So on river I mainly lose by checking and went for pot bet. I think its really tough to call without full house and maybe I can even get weakest FH to fold.

Now afterward I think I should just check flop or turn and perhaps use combos with less chance to improve to mediocre hand as bluff.