PLO100 AJ87ss twopair facing shove on the river

It's a spot where he has often a credible value hand, and not that many natural bluffs. Some KThh might turn to bluff, but you also should have all the medium flushes in your check-call range for the river. Big bet on the river should polarize his range to bluffs and high flushes, and I am not so sure how good spot that is in reality for him to bluff. In these situations I usually want to have the info that opponent is capable to turn medium made hand into a Kh blocker bluff to make hero calls.

If you take HU solver spot, the preflop ranges are VERY different what they are in 4way pot. Even 3way ranges are quite similar to normal 6max BU, SB, BB ranges. But once it's HU, both BU and SB ranges go wide as hell.

Easy check fold.
His range looks like AKTQ
His two pair beats us, but not bet.
Flush does not fold to Bet , not even to check raise all in.

Preflop is easy call with 3 Broadway Single suited. 3bet is overplay in my opinion

His pot Bet Probably his only Bet size with pure bluff or flush, but he should not have bluff in his range. Rare combo

KKA9 with K high flush blocker the the only hand You beat I believe

Seems like easy fold to me preflop. We should be very selective overcalling from SB. We dont close action and we are in worst position often even in 4way pot. Two upper gaps on side cards suck big time for playability.

With bit deeper SPR on turn I could see this hand being ok bet-fold bluff. But with SPR 1 we dont really want to have small bet range on this spot imo. We will often face pot bet from villain if he bets so this hand will be just x-f. But yeah I think preflop is just quite a big overplay and show why this kind of hand is pretty bad. Its basically tough to flop stuff like top two with support or strong draw.

I am not sure flop Bet is ok. Probably check call the small Bet. With everything op You have one street Bet and You can be Dead on flop. No reason to play the hand that marginal.

When he bets big flop over 1/2 pot , i think You can fold, but even to a smaller Bet You can fold. I dont think players Bet A high flop and play agressive agaist the agressor