SB: $422.80 (105.7 bb)
BB: $400 (100 bb)
UTG: $475.10 (118.8 bb)
MP: $879.19 (219.8 bb)
CO: $731.48 (182.9 bb)
Hero (BTN): $470.25 (117.6 bb)

Preflop: Hero is BTN with 9h Ah
UTG folds, MP calls $4, CO folds, Hero raises to $16, SB calls $14, 2 folds

MP is a fish, SB is completely unknown and new to the site but appears to be a multitabling reg.

Flop: ($40) 9d 4h 5d (2 players)
SB checks, Hero bets $28.50, SB raises to $92.62, Hero calls $64.12

I don't see any other option here.

Turn: ($225.24) 7c (2 players)
SB bets $136.68

No idea what's best here vs an unknown. I can see his range containing 7 combos of sets, a bunch of FDs, and possibly TT I suppose. I have sets and all overpairs in my range but A9hh has the advantage of blocking 99 while not blocking any of his FDs so perhaps this is a better hand to continue with than a hand like QdQx.

If i do decide that this hand falls in my continuing range, I'm not sure if calling or jamming is best on this dynamic of a board where the river will change the board frequently.