I have an very efficient and "practical" algorithm for determining the score in a sports match. In almost all cases it tells us which team had the higher score

I have an very efficient and "practical" algorithm for determining the score in a sports match. In almost all cases it tells us which team had the higher score -- the only time it fails is when the game in close. In those cases, it can't accurately tell who won. It SOUNDS like a very practical algorithm, but in reality it's precisely in the "close" cases where people care the most.