AKs checkraised for the nut flush draw. We're pretty deep.

[brizzology]

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Don't be result oriented, in this case, Push was +EV.

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Call is more +EV than push here, though. Villain may fold to a flop push if he considers his flush outs to be counterfeit, and we'd prefer to have all the money in, as OP is the favorite on the flop.