Function skillratings::uscf::expected_score

pub fn expected_score(
    player_one: &USCFRating,
    player_two: &USCFRating
) -> (f64, f64)

Calculates the expected outcome of two players based on the USCF rating algorithm.

Takes in two players as USCFRatings and returns the probability of victory for each player as an f64 between 1.0 and 0.0.
1.0 means a certain victory for the player, 0.0 means certain loss. Values near 0.5 mean a draw is likely to occur.

Examples

use skillratings::uscf::{expected_score, USCFRating};

let player_one = USCFRating {
    rating: 1800.0,
    games: 130,
};
let player_two = USCFRating {
    rating: 1950.0,
    games: 41,
};

let (exp_one, exp_two) = expected_score(&player_one, &player_two);

assert!(((exp_one * 100.0).round() - 30.0).abs() < f64::EPSILON);
assert!(((exp_two * 100.0).round() - 70.0).abs() < f64::EPSILON);