Our league games are 46 overs per side, but you can declare early and forfeit the remaining overs to the other side, giving you more chance to bowl them out - and them more chance to get them. The same happens if you don't bat out all your overs - though usually in that scenario chasing is a moot point as you don't have much to defend. Batting second, and sometimes with as few as 7 players, we've had to try to bat out for a losing draw on quite a few occasions as chasing the total wasn't really in the equation.