Elo

The Elo Rating System is a widely used method for calculating the relative skill levels of players in two-player games such as chess, go, and various sports competitions. This Go package provides essential functions and structs for implementing the Elo Rating System in your application.

Installation

You can install the elo package using Go modules. Open your terminal and run the following command:

go get github.com/watson-sam/elo

Usage

Here's how you can use the elo package in your Go application:

package main

import (
	"fmt"
	"github.com/watson-sam/elo"
)

func main() {
	// Create Elo settings with custom parameters
    settings := elo.New(
        elo.WithKFactor(32),
        elo.WithInitRating(10),
        elo.WithExpectedFunct(elo.ExpProbability), // Use a custom expected function (optional)
		elo.WithObservedFunct(elo.ObsWinLooseDraw), // Use a custom observed function (optional)
    )

	// Initial ratings for two players
	playerA := settings.NewRating()
	playerB := settings.NewRating()

	// Simulate a match result
	scoreA := 1.0 // Adjust this based on the actual match result
	scoreB := 0.0 // Adjust this based on the actual match result

	// Calculate updated ratings
	newRatingA := settings.UpdateRating(playerA, playerB, scoreA, scoreB)
	newRatingB := settings.UpdateRating(playerB, playerA, scoreB, scoreA)

	fmt.Printf("Player A's new rating: %.2f\n", newRatingA)
	fmt.Printf("Player B's new rating: %.2f\n", newRatingB)
}

This example demonstrates how to create Elo settings with custom parameters and use them to calculate updated ratings after a match. You can customize the package's behavior by adjusting the settings and using different update, expected, and observed functions.

Contributing

If you'd like to contribute to this package or report issues, please visit the GitHub repository.

License

This Elo Rating System Package is open-source software licensed under the MIT License.