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SAL: A Game Learning Machine

SAL: A Game Learning Machine. Joel Paulson & Brian Lanners. Introduction. Why AI game playing? Why AI game learning? SAL (Michael Gherrity, 1993) Search and Learning. Consistency Search. Basic Concept Reasons for Use Allows for Errors in Evaluation Function Pathological Games.

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SAL: A Game Learning Machine

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  1. SAL: A Game Learning Machine Joel Paulson & Brian Lanners

  2. Introduction • Why AI game playing? • Why AI game learning? • SAL (Michael Gherrity, 1993) • Search and Learning

  3. Consistency Search • Basic Concept • Reasons for Use • Allows for Errors in Evaluation Function • Pathological Games

  4. Procedure • Consistent Positions • Evaluation of a position is equal to its minimax value • Inconsistent Positions • Identifying and Correcting Errors

  5. General Example • If B is inconsistent, then one of the evaluations of B, D, or E is incorrect

  6. Consistency Search in Play

  7. Organization of SAL • Game Independent Kernel • Consistency Search Algorithm • Evaluation Functions • Game Specific Move Generator • Incorporates rules of game • Three Subroutines: MoveGenerator, MakeMove, EndOfGame

  8. Features • Used as input for Neural Network • Feature Discovery Problem • Features in SAL

  9. Neural Networks • SAL uses features for Input • Weights altered following each game using Temporal Difference Learning

  10. Performance of SAL • Tic-Tac-Toe • Connect Four • Chess

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