KK vs turnminraise @ flushboard

[skibbel]

PokerStars No-Limit Hold'em, $0.50 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Hero ($263.10)
Button ($65.25)
SB ($16.10)
BB ($48.80)
UTG ($21.75)

Preflop: Hero is MP with K[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/heart.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to $2</font>, Button calls $2, <font color="#666666">2 folds</font>.

Flop: ($4.75) 7[img]/images/graemlins/diamond.gif[/img], 7[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $4</font>, Button calls $4.

Turn: ($12.75) T[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $9.5</font>, <font color="#CC3333">Button raises to $19</font>, Hero ????

Villian unkown. i guess fold is best. what to do if we call and he pushs the river?