org.oakgp.rank.tournament

Class FirstPlayerAdvantageGame

java.lang.Object

org.oakgp.rank.tournament.FirstPlayerAdvantageGame

All Implemented Interfaces:

TwoPlayerGame

public final class FirstPlayerAdvantageGame
extends Object
implements TwoPlayerGame

Removes "first-mover advantage" bias from the evaluation of players in two player games.

Some games have a "first-mover advantage" - meaning the player that moves first has a greater chance of winning than the player that moves second. To avoid "first-mover advantage" causing players to be unfairly ranked, each pair plays each other twice - with each having the opportunity to move first.

Constructor Summary

Constructors

Constructor and Description
FirstPlayerAdvantageGame(TwoPlayerGame twoPlayerGame) Creates a FirstPlayerAdvantageGame that uses the given TwoPlayerGame.

Method Summary

Modifier and Type	Method and Description
double	evaluate(Node player1, Node player2) Determines the outcome of the two specified players competing against each other.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FirstPlayerAdvantageGame

public FirstPlayerAdvantageGame(TwoPlayerGame twoPlayerGame)

Creates a FirstPlayerAdvantageGame that uses the given TwoPlayerGame.

Method Detail

evaluate

public double evaluate(Node player1,
                       Node player2)

Description copied from interface: TwoPlayerGame

Determines the outcome of the two specified players competing against each other.

Specified by:

evaluate in interface TwoPlayerGame

Parameters:

player1 - represents the game-logic of a player participating in the game

player2 - represents the game-logic of the other player participating in the game

Returns:

the outcome of the game from the point-of-view of player1, as implementations of TwoPlayerGame represent zero-sum games then the corresponding outcome for player2 can be determined by negating this value