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Giraffe

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Salvador Dalí - The Burning Giraffe 1Salvador Dalí - The Burning Giraffe 1

  1. Salvador Dalí - The Burning Giraffe, 1937, Oil on panel, Kunstmuseum Basel, The Burning Giraffe from Wikipedia↩︎

Giraffe,
an experimental open source chess engine by Matthew Lai under the GNU General Public License, compliant to the Chess Engine Communication Protocol, written in C++11 and based on deep learning, which is topic of Matthew's master's thesis in August 2015 1 2 . Giraffe uses the Eigen linear algebra library 3 , and Pradyumna Kannan's magic move generator 4 5. As employee of Google DeepMind, Matthew Lai announced the discontinuation of the Giraffe project in January 2016 6.

Contents
  1. Description
  2. See also
  3. Publications
  4. Forum Posts
    1. 2015
    2. 2016
    3. 2017...
  5. External Links
    1. Chess Engine
    2. Misc
  6. References

Description

Giraffe's evaluation function is a deep neural network trained by TDLeaf 7 . Its feature representation includes a map of static exchange evaluations for all squares and sides 8 , a structure already proposed by Russell M. Church and Kenneth W. Church in Plans, Goals, and Search Strategies for the Selection of a Move in Chess 9 . Probability-based evaluation scores are not in centipawns nor linear to material , and span a +-10,000 range, with mate scores of +- 30,000. The search recently changed from traditional depth-based iterative deepening to assigning number of nodes (or time) to child nodes 10 . Node budget allocation will also become neural network based.

See also

Publications

Forum Posts

2015

2016

2017...

Re: Is AlphaGo approach unsuitable to chess? by Peter Österlund, CCC, May 31, 2017 » Texel

Chess Engine

Misc

Giraffe - Internal systems

Watch on YouTube

References

Up one Level

  1. Matthew Lai (2015). Giraffe: Using Deep Reinforcement Learning to Play Chess. M.Sc. thesis, Imperial College London, arXiv:1509.01549v1↩︎

  2. *First release* Giraffe, a new engine based on deep learning by Matthew Lai, CCC, July 08, 2015↩︎

  3. Eigen, a C++ template library for linear algebra: matrices, vectors, numerical solvers, and related algorithms↩︎

  4. Fastest Magic Move Bitboard Generator ready to use by Pradu Kannan, Winboard Forum, August 25, 2006↩︎

  5. Pradyumna Kannan (2007). Magic Move-Bitboard Generation in Computer Chess. pdf↩︎

  6. Death of Giraffe, but hopefully not ML in chess! by Matthew Lai, CCC, January 21, 2016↩︎

  7. Jonathan Baxter, Andrew Tridgell, Lex Weaver (1998). TDLeaf(lambda): Combining Temporal Difference Learning with Game-Tree Search. Australian Journal of Intelligent Information Processing Systems, Vol. 5 No. 1, arXiv:cs/9901001↩︎

  8. SEE Map by Matthew Lai, CCC, July 20, 2015↩︎

  9. Russell M. Church, Kenneth W. Church (1977). Plans, Goals, and Search Strategies for the Selection of a Move in Chess. Chess Skill in Man and Machine↩︎

  10. Time assignment to children by Matthew Lai, CCC, July 26, 2015↩︎

  11. Rectifier (neural networks) from Wikipedia↩︎

  12. Ryzen from Wikipedia (Threadripper)↩︎

  13. Chess hackery by Steven Edwards, CCC, October 02, 2015↩︎

Categories: WinBoard · XBoard · Open Source · GPL · NN · X86 · X64 · PC · Windows · Linux · Thesis · Mammal · Salvador Dalí · Manu Dibango

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Contributors: GerdIsenberg.