Standard situation.
SB is a 2+2 kind of TAG, button is a loose passive (70/10/0.6).
Party Poker 10/20 Hold'em (6 max, 4 handed)
FTR converter on zerodivide.cx
Preflop: Hero is BB with 4[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/diamond.gif[/img].
1 fold, Button calls, SB completes, Hero checks.
Flop: (3 SB) A[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/spade.gif[/img] (3 players)
SB checks, Hero bets/folds?