what do you think about folding KK pre-flop in this situation?
1) opponent has 15/10 stats
2) a) I raise 4xBB, he reraises 12xBB
OR b) he raises 4xBB, I reraise 12xBB, he shove

I think (a) is kind 50/50, but I'd almost always fold (b)

a.) 3-bet every time. If you run into aces here it sucks.
b.) Depends how deep stacks are. Have you seen him play AK, QQ like this in early position?

15/10s probably play hands like JJ and QQ more like the nuts which is really where AKo gets a ton of its equity. Not many people will show up with AQs/o in that situation so you shouldn't even look foward to that equity.

anyways. 4bet (a) i stack in (b) but im a donkey with ako

6 or 10 handed?
How deep is stacks?
What positions are you both in?

If its 6 handed and 100bb deep then lol at folding as a normal play.

Always fold. No one 3bets without AA.

the doubt is not if I'll lose always, but if I'll lose more than I'll win

Poker stove it. If that program still exists?

Give him whatever range of hands you feel he can have here. I guess that leads to the obvious question:
what range of hands can villian have in situation A and B?

Hand 1: KhKd
vs.
Hand 2: QQ+, AKs

Equity
Hand 1: 52.1%
Hand 2: 47.9%


Looks like even vs a pretty tight preflop nit you're ok. You're 50/50 vs QQ+ also.

yep
but if you take QQ out and add AKo:

KK - 47,3%
KK+,AK - 52,7%


and if you take AK (so, he would just do this move with KK (too rare) or AA), that's just 22,6%

well... now the question would be how often a 15/10 player does that
but I don't think a call is so simple in this situation

lol