Tough river decision

175/455, you have to be right less than ~40% of the time to profit. I'd say, given the play of the hand, 50% of the time that A on the river cripples you. I see two things happening here that are by far more concrete than some kind of cute play with KhQh. First, he was slow playing a full house from the get go, KK. That's just entirely possible and somewhat clever. Or, two, he hit his A for a full house on the river. The KhQh is less satifsying considering that he would probably make some kind of bet on the flop and just let it go if he met aggression. I'd lay this down, begrudglingly, and perhaps only in theory.