SB is a decent TAG who likes to call quite a lot oop preflop, he usually takes the initiative on turns when the flopped checked thru and he has a piece. CO is new to the table.

$0.5/$1 No Limit Holdem
5 players
Converted at weaktight.com

Stacks:
Hero ($132.36)
CO ($113.90)
BTN ($21.50)
SB ($102.65)
BB ($196.90)

Pre-flop: ($1.50, 5 players) Hero is UTG
Hero raises to $4, CO calls $4, 1 fold, SB calls $3.50, 1 fold

Flop: ($13, 3 players)
SB checks, Hero checks, CO checks

Turn: ($13, 3 players)
SB checks, Hero bets $8, CO folds, SB raises to $18