It's actually not I hand that I've played.I read this in a book and I find It interesting.

BB:$2745
HERO(BTN): $2670
Preflop: Hero is BTN with 8s9s,Hero raises $60
BB raises to $200,Hero calls $140
Flop ($410)Qc7h6d
BB bets $335,Hero calls $355
Turn ($1120)Js
BB bets $785, Hero is All-in

If you're the player at the BB with what would you 2 barrel here and fold/call on the turn considering hero might flat call your 3 bet with a wide hand range.

I'll post the Hero point of view later If anyone is interested

terrible play. What book did you read?

The book is "Let there be range" and is one of the best so far .It's just a different approach of the game (you're definitely not doing this against a tight player)

Here is more information: X is villain's folding percentage
1905X+(1-X)[-2115X.818+3235*.182]=
3046.3X=1141.3
X=37.5%
villain has to fold 37.5% to break-even and you still have some equity vs the best hand.
So give your opinion if this move is good.
If It is - when and why?
If It's not - why?

he barrels JJ+,QJ,KQ+,AK,67s,89s,9Ts,KT for sure. undiscounted thats 53 value combos and 36 open enders/gutshots. with 53 value combos he has to fold 32 combos for shove to break even, assuming 18% equity when called, so shove is profitable if he barrels every AK and doesnt 3bet 66/77. its gonna be pretty close either way. that also assumes he folds KT and 9T, which if he doesn't is a disaster for you, since thats 22 undiscounted combos so he only has to spazz occasionally with those hands to make our play unprofitable with this specific hand. also, although sizing doesn't indicate it, he could have AJ as well and might call off with that too since you rep pretty much nothing but a draw jamming on this texture.

Agreed, also the turn card that came is a terrible card for our opponent in view of our range because it smacks us so hard. I think we have very little fold equity. Maybe AK if he even decides to barrel that. Our opponent isn't even leaving any room really for him to triple barrel the river which puts him more at a value hand here. I am folding turn always against a competent opponent with this hand.

The play is exploiting the re-raiser's potential ability to fold out draws and pairs worse than Jx by betting turn. If that's the case, the re-raiser should be barreling 100% on this card as a bluff, a pure strategy.

If the re-raiser is barreling here 100% of the time, then shoving 98 as a semi-bluff is a no-brainer play, since it's tough to call a river shove with 9 high unless you're one of those UB guys.

Almost any player is going to fall somewhere in the middle of these two dynamics and with the requisite folding equity, the play is a pretty important part of an aggressive heads up match.

what part of our range does the J smack so hard?