It's hard for me to judge how it will be more profitable in mathematics, I'm inexperienced, but I would play sol in such a situation (after all, there are two of us left, did BB also fold? Means SB and so into allin), it seems to me that SB should defend his hands, and he is a short stack, and there is probably a pair (any), or someone like AK, AQ ... as well as Ah, Kx, 9X, or suited connectors
.... so A9 shouldn't be too bad a hand, especially since we're losing about half the pot.
Of course, we can assume that there are AA, KK, QQ, JJ, TT to which we are losing, then of course we pass.
In other cases, if you haven't missed anything - a coin (again, given the depth of the stacks, we do not fly out, and we can still fight).
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