Which meant that this all basically rode on Percy, because Oliver would rather Ravenclaw win the Cup than Slytherin, and so he'd be making a concerted effort to not be losing by more than thirty, but had already told his Chasers that their job was mainly to maintain that balance, not to score an excessive number of goals. To win without the Snitch they'd have to be winning by more than a hundred and fifty, and Ravenclaw was good, and if they were winning by less than that but more than ninety and Cho Chang caught the Snitch, Slytherin would win the Cup and nobody wanted that to happen.