River stack sizes.... Hero $3.74, BB covers, Button $1.85.

Check/decide. They both have straights in their ranges.

+1 for check/decide

these guys...

Would it be wrong to check the flop with the purpose to raise a bet from the PF agressor or the hyper agro MP?

Generally the PF aggressor won't cbet with this many in the pot unless he has something so leading out is better imo. What makes you think MP is hyper aggressive? is AF is only 1.5 over a small sample.

I think potting flop and open shoving turn is good

I would never x flop on this board

AP I like river is probably best

few things i would consider..

you definitely could consider 3 betting the 99s preflop, agro guy is either going to fold and passive BTN fish will call which is nice, we can then cbet dry flops get him to fold, value bet low flops ect, they both might just fold PF. They both might just fold which is nice to some small part of the time.. If they both call still pretty straight forward because i expect you to be pretty far ahead preflop so should be able to pick up some pots and value bet enough...

I guess if you had JJs or QQs you would definetly 3 bet for same reasons, i think 99s are not that much worse that we should always just call... Just a thought anyways

As played.. donking can be good but also bad imo, if there at all thinking donking is bad because it is simply just really strong and it looks strong, your betting 4 way on a J9x board, always a strong hand.
on the other hand there likely not thinking so betting should be fine because plenty worse will definitely call, plus we don't want hands like KT to check and get a free card because they think they have no Fold equity...

conclusion donking flop is fine provided we understand were playing exploitably..

Turn and river i think you played fine, cant do much here plus we dont expect them to be bluffing that much or at all really. the fact they do is super interesting and we should take a note to use in future.

other interesting thing is they both call turn and dont raise, i think most micro guys raise the turn here with T8, so that does narrow there range a bit to draws and junk like they had.. still though i expect to see flush a high 90% of the time when a player jams like so

personally i would likely just C/r flop, again this is exploitable as i am only doing it with strong hands 4 way and not any bluffs, but i don't always expect my opponent to know that, especially at 5nl,

Against better players c/c flop is probably optimal to balance your calling range, with some rare c/r both as bluffs and for value.. most likely wouldnt have donking range versus better players

Nice post!

I prefer donking flop big because 4way pots tend to get checked around a lot