Bounty live mtt 100$
were on 70k stack on 600-1200 with BB ante
6 handed
open UTG to 3k with A5d MP call(cover me) and bb also call.

flop A-Q-10 Heart Draw(the A and 10)-pot 11k,BB check and i cbet to 6k
MP call,BB fold.

Turn black 10.
while he could be hitting the 10 and it's in it's range,i was thinking he's more liky on flush drawm,a Qx and mabey K/j.
i oppted to bet again(mistake mabey?)

i bet 12k and think for 20 seconds and call again.
river black 3.
dont see anyvalue in betting now,so i check.
he think for a little while and bet 20k

hero?
feel free to tell me mistakes on every street of course.

I think A5s is a bad hand to open in UTG (even 6-handed)… And your hand is the perfect example Why is not good to open that kind of hands…
As played, I think turn is check/fold... If he check back turn, maybe you can check/call river because he can be bluffing after checking the turn...

yeah you're now in a guessing game for a bloated pot with some bluffs in V range that you want to call off but inevitably get shown JT at that 20K sizing.

small block bets are your friend holding weak top pair

just check the flop or if bet, then use smaller sizing like 1/3rd.
defo must x turn, it's just a bad card fpr OOP range after cbetting otf.
villain way more Tx combos than you.
anyways as played otr basically what oldsilver pointed out & folding river as played

This is a range neutral flop and mostly a check with your range, you have too many underpairs to be cbetting very frequently (you need to x a lot of value, even say AA, QQ, TT and KJ combos, to prevent V from being able to exploit you by too-easily moving you off an exploitably weak x range) and V has those same underpairs too so it's not like your value is missing out too much by x flop--about half of V's range is paying you off (or owning you depending on where you're at in your range) which implies we just want to mostly check--we're not extracting too much EV when we bet because of range neutrality.

That being said, betting with any Ax is OK because and Ax is currently beating ~50% of his range.

But sizing is way, way, way too big. In theory you should never use this sizing, though in practice if you think V calls too much 22-99 it could be OK with value as weak as A5 and if he folds too much then cbet5bb can be OK exploitatively with you air.

In theory, while it's true that having a wide x range implies betting a fairly narrow range which would imply strong value which would imply sizing that's not tiny, and while it's true you definitely have some nutted hands and strong bluffs that, in theory, as long as V isn't astute enough to adjust, would be fine going with bigger than tiny sizing (like say your chosen 5bb sizing, for the strongest half of your range there's not really much EV difference between cbet5bb and cbet1bb), with respect to your overall range, in this particular range neutral spot, you just have too many hands (again, about half your range, just like V's, this is a range neutral flop) for which, in theory, betting 5bb is horrible (and that includes A5s--you're lucky if you have 40% equity against his continue range vs cbet5bb) such that it would be really suboptimal to split your range in that fashion (i.e take the strongest half of your range and bet 5bb and take the weakest half of your range and bet much smaller).

Bet 1bb or x and go from there.

The suit of the Q matters because having a backdoor FD adds enough equity to your hand (~200 basis points) to justify going with a bigger sizing (~3bb).