A shove here is the only play right? I'm prety sure V1 is squeezing and folding, but I think other villain that called his 3bet can't fold?

Also I'm curious about the maths of bringing 2 villains by pricing them in instead of shoving and folding some of their equity when they are in rough shape.

UTG+1: C100.00
MP: C86.65
Hero (MP+1): C114.15
LP: C100.00
CO: C38.61
BTN: C27.77
SB: C79.02
BB: C292.22
UTG: C106.70

SB posts SB C0.50, BB posts BB C1.00, UTG+1 posts DB C1.00

Pre Flop: (C2.50) Hero has K K

fold, UTG+1 checks, fold, Hero raises to C3.25, LP calls C3.25, CO calls C3.25, fold, SB calls C2.75, BB raises to C21.00, UTG+1 calls C20.00, Hero raises to C114.15 and is all-in

Yeah shove is the only option. Raising to 60 and then risking going 3 or 4 ways to flop is bad. Even if everyone folds you're still winning a decent sized pot!

For the math (let's say it folds back to BB):

There's around 50bb in the pot when it comes back to BB. If you raise to 60, BB has to call 40 to win 150 = 26% equity to call. If he calls, then UTG+1 has to call 40 to win 190 = 21% equity to call. So if you raise to 60 they're both getting really good prices to call. Any Ace has enough equity to call that in both spots (A6o even has 28.33% against KK). Basically, you're allowing them to make money long term against your KK. Thing is though these equities are heads up only against your KK, so the equities would be different 3 ways to the flop. Just know that you're giving them the right price to hit an ace on the flop.

So yes the only play is to jam! Deny that equity