27-18 button is going to go multiway ip most of the time with a huge fish already called = range is going to be pretty wide here. Take out or at least discount QQ+/AK/AQ cos he's going to squeeze these for massive value vs the fish at least some of the time, the fish may also mean that he's going to squeeze light less often. So preflop likely calling range 22-TT, suited connectors and gappers, ATs/AJs/A2s-A5s, other suited broadways.

Flop. When you bet this big 3 way on such a wet board with a 55-0 left to act you rep some solid strength, co folds so reg knows he's hu vs a strong range. And he raises. He has overpairs/two pairs/straights/sets/combos (including things like tp3k+oesd). I doubt he has any air in there, folding 66, etc.

Text results appended to pokerstove.txt

30,690 games 0.000 secs 6,138,000 games/sec

Board: 8h 9h Td
Dead:

equity win tie pots won pots tied
Hand 0: 63.633% 62.36% 01.27% 19138 391.00 { TcTs }
Hand 1: 36.367% 35.09% 01.27% 10770 391.00 { JJ, 99-88, AhQh, AhJh, AhTh, Ah5h, Ah4h, Ah3h, Ah2h, KhQh, KhJh, QJs, QhTh, JhTh, 76s }