core/io.github.lunalobos.chess4kt/EloCalculator

EloCalculator

open class EloCalculator(var impactFactor: Double = 32.0, var rangeFactor: Double = 400.0, var logisticBase: Double = 10.0)

Calculates and updates player ratings based on the Elo rating system. This class uses a logistic distribution to predict the outcome of a match between two players and adjusts their ratings based on the difference between the actual and expected results.

Since

1.0.0-beta.8

Author

lunalobos

Constructors

constructor(impactFactor: Double = 32.0, rangeFactor: Double = 400.0, logisticBase: Double = 10.0)

Properties

var impactFactor: Double

The K-factor that determines how much a single match affects the rating. A higher value leads to faster rating changes. Default is 32.0.

var logisticBase: Double

The base of the exponent in the logistic function. Standard Elo uses base 10.

var rangeFactor: Double

The scale factor used to determine win probability. Default is 400.0.

Functions

fun calculate(white: Player, black: Player, outcome: Outcome)

Calculates the new Elo ratings for both participants and updates their Player.currentElo properties directly.