Manual Usage

manualUsage.ts

import createRatingSystem from '@sc2/rating'

// Defaults to K 32, Scale 400, Base 10
const ratingSystem = createRatingSystem()

// get two players
const playerA = {
    id: 'playerA',
    rating: 1000,
}

const playerB = {
    id: 'playerB',
    rating: 1200,
}

// Get expected probabilities for both players
const [playerAProbability, playerBProbability] = ratingSystem.getExpectedPlayerProbabilities(playerA.rating, playerB.rating)
const aScore = 1
const bScore = 1 - aScore

// Get each players updated rating based on the outcome of the game using scores and probabilities from above.
const [nextPlayerARating, playerADiff] = ratingSystem.getNextRating(playerARating, aScore, playerAProbability)
const [nextPlayerBRating, playerBDiff] = ratingSystem.getNextRating(playerBRating, bScore, playerBProbability)

// Update player rating values
playerA.rating = nextPlayerARating
playerB.rating = nextPlayerBRating