[lastchance]

ICM can't, but you can.

Instead of the actual fold equity, SB is all-in with almost every hand, and BB calls any 2.

So, 50% of the time, stack-sizes while folding will be
1995
4120
1180
2705

You have .2318 EV there.

Other half of the time, stacks are
1995
5300
2705

This is .29 EV.

.5 * .29 + .5 * .232 = .261 Equity when you Fold.

Button pushes some of the time, but this is negligible.

I think your equity also drops because you're paying the blind next round, and considering you have 5x BB, this is lousy.

Maybe drops it to about .255 EV.

That's what my estimate of your equity while folding is.

And if SB isn't calling with >20% of hands here, I think SB's an idiot.