Nut flush on a paired board facing strength (50$ NL on Party).

[amoeba]

I don't know but I don't like the way you played the hand.

on the flop, bet $4 and represent the K. he has a tough time calling without a K in his hand and is likely folding a lot of underpairs. if he has lower flush draw, you earn more on earlier streets the time the flush doesnt hit.

on the turn when you hit the flush, bet. 4th flush kills your action and another card paring kills you. sometimes he checks behind with a K.

when you checkraise, if he is decent, hes folding anything that doesnt beat AK.

so unless if you put him on lower flush, I think you are actually against a boat here if he is decent. although the possibility of 77 seems rather remote.