EloSystem
elo system for any two-team multiplayer game (CSGO etc), chess and running competitions.
Installation:
npm install elosystems
for expo:
expo install elosystems
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usage:
import { runningIndex, teamVersusElo, chess } from "elosystems";
OR
const {runningIndex, teamVersusElo, chess} = require("elosystems")
1. Team-versus-team elo calculation:
Each player must be looped trough this function individually
teamVersusElo(currentPlayerElo, playerWon, playersTeamAvgElo, enemyTeamAvgElo))
Example:
const updatedElo = teamVersusElo(700, true, 750, 700))
returns: 735.5, as the new elo for the individual player
2. Chess:
chess(player1Elo, player2Elo, winner(1,2,(3 as draw)), K-factor)
Example:
const newRatings = chess(1810, 1750, 1, 20)
returns:
Object { p1: 1821.7099735734362, p2: 1738.2900264265638, rating: 11.70997357343619, expectedValue: 0.4145013213281905 }
3. Running competition system:
Recommended elo starting value is 100
3.1 Competitors elo calculation:
runnerElo(playerCurrentElo, placement, avgEloOfCompetition, amountOfParticipants)
Example:
const playersNewElo = runnerElo(70, 1, 90, 5), returns: 78, as the new elo for current individual player
3.2 Running (by distance) index calculation during competition:
*Index means points in this case, for example more points equals better position in the competition
runningIndex(playerElo, distanceInKm)
Example
const playerPoints = runningIndex(100, 30)
returns: 20, as the points for current individual player
3.3 Running with speed factor index calculation during competition:
*Index means points in this case, for example more points equals better position in the competition
runningIndexWithSpeed(playerElo, distanceInKm, runningPace (min/km)>
Example
const playerPoints = runningIndex(100, 20, 6)
returns: 5, as the points for current individual player