Join Date: Aug 2015
Posts: 5,678
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.