Scalable Search in Computer Chess: Algorithmic Enhancements and Experiments at High Search Depths (Computational Intelligence)

Scalable Search in Computer Chess: Algorithmic Enhancements and Experiments at High Search Depths (Computational Intelligence)

This book presents the results of our past two-and-a-half years of research aimed at increasing the scalability and performance of game-tree search in computer chess. We elaborate on our respective works in the areas of (I) selective forward pruning, (II) the efficient application of game-theoretical knowledge, and (III) the behaviour of the search at increasing depths. The broad range of topics covered by the three distinct parts of the book seek to provide interesting material for everybody interested in the field of "Compu­ tational Intelligence", regardless of their individual focus (researcher, student, or other). The text does not require readers to know about chess and computer game-playing beforehand. The initial chapter entitled "Computer-Chess Primer" introduces all the necessary basics and fundamentals thereof. The remaining chapters, however, go far beyond those topics. They show how to make sophisticated game-tree searchers still more scalable at ever higher depths. Throughout the whole book, our high-speed and master-strength chess program DARKTHOUGHT serves as a realistic test vehicle to conduct numerous experiments at unprecedented search depths. The extensive experimental evalu­ ations provide convincing empirical evidence for the practical usefulness of the techniques presented by us. These results will certainly be of special interest to researchers and programmers of computer strategy-games alike (chess, checkers, Go, and Othello in particular). Last but not least, I like to mention that I am most grateful to the series editors for offering me the opportunity to publish my book under their auspices. DarkThougt unplugged Anspruchsvolle und brandneue Forschungsergebnisse des Computer-Schach. The book presents new results of computer-chess research in the areas of selective forward pruning, the efficient application of game-theoretical knowledge, and the behaviour of the search at increasing depths. It shows how to make sophisticated game-tree searchers more scalable at ever higher depths. Throughout the whole book, the high-speed and master-strength chess program "DarkThought" serves as a realistic test vehicle to conduct numerous experiments at unprecedented search depths. The extensive experimental evaluations provide convincing empirical evidence for the practical usefulness of the presented techniques. Advantages: - presentation of advanced and brand-new research results in computer chess (e.g. selective pruning and other search enhancements, improved endgame databases, etc.) - numerous experiments at unprecedented search depths - extensive experimental evaluation - practical usefulness of new techniques proven within strong state-of-the-art chess program "DarkThought" - includes detailed implementation skeletons in ANSI-C - contains concise introductions into the game of chess and the basics of computer chess in general Ernst A. Heinz earned his "Doktor" (Ph.D.) degree with "Auszeichnung" (summa cum laude) from the University of Karlsruhe, Germany, in July 1999 and joined the Laboratory for Computer Science at the Massachusetts Institute of Technology (M.I.T.), Boston/Cambridge, USA, as a Postdoctoral Fellow later that year. ----- German ----- Ernst A. Heinz bestand seine Doktorprüfung an der Universität Karlsruhe im Juli 1999 mit Auszeichnung und ist seit Herbst 1999 als "Postdoctoral Fellow" am "Laboratory of Computer Science" des "Massachussetts Institute of Technology" (M.I.T.) in Boston/Cambridge, USA.