Check Raise Semi-Bluff

[Blackjack]

Party Poker No-Limit Hold'em Tourney, Big Blind is t100 (6 handed) converter

Button (t920)
SB (t2050)
Hero (t2655)
UTG (t1220)
MP (t1180)
CO (t1975)

Preflop: Hero is BB with J[img]/images/graemlins/spade.gif[/img], T[img]/images/graemlins/club.gif[/img].
<font color="#666666">2 folds</font>, CO calls t100, <font color="#666666">2 folds</font>, Hero checks.

Flop: (t250) 7[img]/images/graemlins/heart.gif[/img], 2[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">CO bets t100</font>, Hero calls t100.

Turn: (t450) 3[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">CO bets t100</font>, <font color="#CC3333">Hero raises to t500</font>, CO folds.

Final Pot: t1050

Spewage or good play? WTF does a 100 chip bet mean