integrating cwu chess in the arena chess gui kyle littlefield - cs department advisor: razvan...
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Symposium On University Research and Creative Expression (SOURCE2009), Central Washington University, Ellensburg, USA, May 21st 2009
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ADAPTIVE CHESS PROGRAM
Integrating CWU Chess in the ARENA Chess GUI
Kyle Littlefield - CS Department
Advisor: Razvan Andonie
Symposium On University Research and Creative Expression (SOURCE2009), Central Washington University, Ellensburg, USA, May 21st 2009
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Program Collaborators
Ashur Odah (graduated 2004) Pushpinder Heer (graduated 2004) Joseph Lemnley (graduated 2006) Jonathan Widger (graduated 2006) Berk Erkul (graduated 2007) Lukas Magill (graduated 2008) Kyle Littlefield (currently enrolled)
Symposium On University Research and Creative Expression (SOURCE2009), Central Washington University, Ellensburg, USA, May 21st 2009
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The CWU Chess Program
Genetic Algorithm trains 10 separate weights used in the neural network.
Increases in skill level per set of 10 games.
Symposium On University Research and Creative Expression (SOURCE2009), Central Washington University, Ellensburg, USA, May 21st 2009
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What is a Neural Network?
It Starts with the basic unit called a Neuron
Takes continuous input from an external source
Projects output based on the sum of the inputs and threshold of the neuron.
A neural network is excellent at classifying an input to an output.
Outputs the “learned” result from the acquired input.
Symposium On University Research and Creative Expression (SOURCE2009), Central Washington University, Ellensburg, USA, May 21st 2009
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Criteria used by Neural Network
Carrascal, A, Manrique, D, & Rios, J Neural networks evolutionary learning in chess game.
Symposium On University Research and Creative Expression (SOURCE2009), Central Washington University, Ellensburg, USA, May 21st 2009
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What is a Genetic Algorithm? Uses a population of
chromosomes
Each chromosome represents an individual.
Has a fitness value representinghow well it survives in this world
Symposium On University Research and Creative Expression (SOURCE2009), Central Washington University, Ellensburg, USA, May 21st 2009
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The Goal…
To optimize the population Find the individuals with the highest fitness.Avoid getting caught in a local optima
Symposium On University Research and Creative Expression (SOURCE2009), Central Washington University, Ellensburg, USA, May 21st 2009
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The CWU Chess Program
Genetic Algorithm trains 10 separate weights used in the neural network.
Increases in skill level per set of 10 games.
Neural Network controls the behavior of an Alpha-Beta Search algorithm.
Symposium On University Research and Creative Expression (SOURCE2009), Central Washington University, Ellensburg, USA, May 21st 2009
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What is an Alpha-Beta Search?
A search algorithmSeeks to reduce the number of nodes
evaluated in a search tree.
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8 5 2 9
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Cut Off Region
Node being Examined
No need to evaluate the left branch of the examined node. The value will be 1 or less. The root will be 8.
Symposium On University Research and Creative Expression (SOURCE2009), Central Washington University, Ellensburg, USA, May 21st 2009
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CWU Chess Program Running
Symposium On University Research and Creative Expression (SOURCE2009), Central Washington University, Ellensburg, USA, May 21st 2009
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The Problem
The CWU-Chess program used a Windows Form for a User Interface. This didn’t allow for communications with
other chess interfaces or engines.
The Universal Chess Interface (UCI) Protocol allowed this to happen.
Symposium On University Research and Creative Expression (SOURCE2009), Central Washington University, Ellensburg, USA, May 21st 2009
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The UCI Protocol
Uses the console to communicate between the User Interface and the Chess Engine.
Communication is performed by sending and receiving textual information.
Symposium On University Research and Creative Expression (SOURCE2009), Central Washington University, Ellensburg, USA, May 21st 2009
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Implementation
Remove the Windows Form Interface and all dependencies to it.
Parse UCI Commands and parameters. Use them to control the engine.
Redesign Genetic Algorithm fitness function and network parameters.
Redesign Genetic Algorithm fitness function and network parameters.
Symposium On University Research and Creative Expression (SOURCE2009), Central Washington University, Ellensburg, USA, May 21st 2009
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UCI Chess Running On ARENA