Holdem/foldem challenge

[betgo]

20-table SNG. No reads.

PokerStars No-Limit Hold'em Tourney, Big Blind is t400 (8 handed) FTR converter on zerodivide.cx

UTG+1 (t12849)
Hero (t10224)
MP2 (t2072)
CO (t9635)
Button (t8456)
SB (t3718)
BB (t3745)
UTG (t36875)

Preflop: Hero is MP1 with 8[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/spade.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises to t1200</font>, <font color="#666666">2 folds</font>, Button calls t1200, <font color="#666666">2 folds</font>.

Flop: (t2575) 4[img]/images/graemlins/heart.gif[/img], 4[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets t2000</font>, Button calls t2000.

Turn: (t6575) 5[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">Button bets t5231 (All-In)</font>, Hero ???