// elo.js
function calculateElo(currentRating, opponentRating, actualScore, kFactor = 32) {
    const expectedScore = 1 / (1 + Math.pow(10, (opponentRating - currentRating) / 400));
    const newRating = currentRating + kFactor * (actualScore - expectedScore);
    return newRating;
}

module.exports = {
    calculateElo,
};