KK, double-paired board, river value bet
 

This was about 15 hands in, Party 20+2. Villain got his chips by doubling from 600 with KK which he'd open-limped UTG+1. He's been in a bunch of pots so far, but hasn't done anything too notable.

The river bet here is pretty standard, right? How's the amount? If he has a ten he bets at some point, and if he's at all reasonable he's not going to have a 6. I'm figuring this is a bet he could call with 77-99. If I get check-raised, is it a fold?

Party Poker No-Limit Hold'em Tourney, Big Blind is t30 (10 handed) converter

saw flop|<font color="#C00000">saw showdown</font>

UTG+1 (t970)
<font color="#C00000">Hero (t905)</font>
MP1 (t405)
MP2 (t1050)
MP3 (t730)
CO (t520)
Button (t775)
SB (t760)
<font color="#C00000">BB (t1295)</font>
UTG (t590)

Preflop: Hero is UTG+2 with K[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/heart.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises to t90</font>, <font color="#666666">6 folds</font>, BB calls t60.

Flop: (t195) 3[img]/images/graemlins/club.gif[/img], 6[img]/images/graemlins/spade.gif[/img], T[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, Hero checks.

Turn: (t195) T[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, <font color="#CC3333">Hero bets t125</font>, BB calls t125.

River: (t445) 6[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, <font color="#CC3333">Hero bets t275</font>

Re: KK, double-paired board, river value bet
 

This sure gets a lot easier if you actually bet the flop.

Since you didn't, check behind or go all in.