This is a decent approximation. It handles all the common hazard cases: +10/-0 should rank higher than +1/-0 +10/-5 should rank higher than +10/-7 +100/-3 sh

This is a decent approximation. It handles all the common hazard cases: +10/-0 should rank higher than +1/-0 +10/-5 should rank higher than +10/-7 +100/-3 should rank higher than +3/-0 +10/-1 should rank higher than +900/-200