50/100 deep vs peachy, thin value?

[Bill King]

im interested in what he checks and calls the river with here

[FiSheYe]

I think this is 1 lvl too high for me atm..
I haven't found enough excellent players on my 25/50 games to make such a move necessary so I don't feel qualified to say if it is that good.
Nonetheless I am thankful for the quality of this hand, just shows me how much more I can learn.
Did he called with KK ?

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