my turn semi bluff good? check river? ai bet? small bet?

[hamnegger]

look at stack sizes before you answer the 3 questions.

PokerStars No-Limit Hold'em Tourney, Big Blind is t100 (8 handed) internettexasholdem.com

SB (t3295)
BB (t1450)
Hero (t13217)
UTG+1 (t10205)
MP1 (t2090)
MP2 (t2980)
CO (t2290)
Button (t2115)

Preflop: Hero is UTG with A[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/club.gif[/img].
<font color="#CC3333">Hero raises to t300</font>, <font color="#666666">3 folds</font>, CO calls t300, <font color="#666666">3 folds</font>.

Flop: (t750) Q[img]/images/graemlins/spade.gif[/img], 4[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, CO checks.

Turn: (t750) 7[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets t500</font>, CO calls t500.
River: (t1750) K[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero ?