ELO Everything

"The Elo rating system is a method for calculating the relative skill levels of players in zero-sum games such as chess." [1]

Each outcome adjusts the winner's and loser's Elo ratings according based on the current difference.

For example:

- A 1500 elo beats a 1300 elo. The winner gains 5 and the loser loses 5.

- A 1300 elo beats a 1500 elo. The winner gains 15 and the lower loses 15.

The math is such that a 100 point difference is 2:1 advantage. A 400 difference is 9:1 advantage.

[1] https://en.wikipedia.org/wiki/Elo_rating_system

Elo isn't an acronym/initialism.

Idea would be great for product recommendations, as long as the spam issue can be solved. Most people can make a reliable comparison between two products but maybe not among many.

Hitler is currently rank 1, so, that's an interesting application of Godwin's Law

While we're on the subject, neither is TOR.