## ZELO Explanations

#### How do I compute my ZELO score?

Each player starts with a score of 1000 ZELO points.After a game the new ZELO score for the winner and the new ZELO score for the looser (denoted by new

_{W(elo)}and new

_{L(elo)}respectively) are computed by the formula:

- new
_{W(elo)}= W(elo) + int[C * A + A * max{0 , S * (L(elo)-W(elo))}] - new
_{L(elo)}= L(elo) - int[C * A - score * max{0 , S * (W(elo)-L(elo))}]

- W(elo) = Winner's ZELO before the game
- L(elo) = Looser's ZELO before the game
- score = Looser's score
- A= 10 - score
- S = 0.001
- C = 4+(L(elo)-W(elo))/250

#### Example

Match: root (1000) vs Zongo (1000),Result: root wins 10-7

Thus we have: score=7, A=3, W(elo)=1000, L(elo)=1000 (before the game)

Formula now gives: root's new elo: 1000+12=1012; Zongo's new elo: 1000-12=988