100/200/25

BB-2300
SB-9000
Hero BT-1400
CO-800

CO Jams, Hero has ATo. Jam or Fold?

What is the prize structure and do you have any reads on CO?

Prize structure is 50% 30% 20%.

CO has been quite patient on the bubble. He was a similar stack to me and folded down to 800.

CO should be jamming a pretty wide range with ICM pressure, only 4BB, antes in the middle and heading into the blinds next hand. Against a good opponent this is likely a push. However, I think we can assume he's jamming tighter than he's supposed to if you haven't observed him stealing a lot.

I think it's close, but I'd fold due to ICM pressure, and it sounds like this guy will allow us extra steal opportunities and walks in future hands.

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After checking in ICMizer, ATo is a push at equilibrium with FGS3, the minimum ace being A9o, but the pusher should be pushing 37% of hands. ATo becomes breakeven at about 20% CO pushing range. I'd still let this one go if he's been passive so far.

Thank you for the response. In game I jammed but after some thought I think it was a mistake.

something I would consider is how the big stack has acted. Is he the type to shover over the top if a smaller stack just flats, or is he willing to flat and increase the prob. of busting the bubble.

If I have 9k in chips on this table, I'm flatting fairly wide against a 4 bb shove and flat to try to bust bubble with a big chip lead.

MOST of the time, with 2nd to shortest stack, I'm folding this because of stack sizes, unless it has become clear the small stack is shoving real wide.