Can This Be Right?

[DpR]

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Wow are you good! I had to have him read me all the river stats and you're correct (except that it's +75% of the time he doesn't fold OR CHECK the river).

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Not to be a nit, but him checking doesnt enter the calculation. AF is (Bet + Raise)/Call. So when he checks the river the AF doesnt change (i.e. a check-call adds 1 to the denominator of the AF ratio and a check-raise adds 1 to the numerator)