ICGA Journal - Volume 21, issue 4

Article Type: Other

DOI: 10.3233/ICG-1998-21401

Citation: ICGA Journal, vol. 21, no. 4, pp. 209-210, 1998

Authors: Haworth, G.McC. | Velliste, M.

Article Type: Research Article

Abstract: The existence of endgame databases challenges us to extract higher-grade information and knowledge from their basic data content. Chess players, for example, would like simple and usable endgame theories if such holy grail exists: endgame experts would like to provide such insights and be inspired by computers to do so. Here, we investigate the use of artificial neural networks (NNs) to mine these databases and we report on a first use of NNs on KPK. The results encourage us to suggest further work on chess applications of neural networks and other data-mining techniques.

DOI: 10.3233/ICG-1998-21402

Citation: ICGA Journal, vol. 21, no. 4, pp. 211-227, 1998

Authors: Heinz, E.A.

Article Type: Research Article

Abstract: This contribution follows up on the work by Hyatt and Newborn (1997) who let the program CRAFTY “go deep”. We repeated their experiment with our own chess program DARK THOUGHT and obtained similar experimental results. Both experiments provide strong empirical evidence for the surprising observation that even at high search depths of 11 to 14 plies modern chess programs steadily discover new best moves in still 16 percent of all searches on average. Moreover, the experiments do not reveal any conclusive trend towards fewer new best moves at search depths beyond 14 plies. Hence, the available experimental …results do not really fuel the intuitive notion that such “changes of mind” taper off continuously with increasing search depths. If at all, only the behaviour of DARK THOUGHT with a drop to 13.7 percent new best moves on average in iteration #14 hinted at decreasing “changes of mind” for search depths of 15 plies or more. Additionally gathered data about the 14-ply searches of CRAFTY and DARK THOUGHT allowed us to study the behaviour of both programs in greater detail. This led to the astonishing finding that regardless of the actual search depth a sizeable 30 to 50 percent of all new best moves on average represented “fresh ideas” which the programs never deemed best before. The finding adds support to Newborn’s (1985) hypothesis about the playing strength of chess programs. Furthermore, the additional numbers educated us about continuing odd/even instabilities of modern chess programs. These instabilities decreased notably only at high search depths of 9 to 14 plies in positions with reduced material as they mostly occur in endgames and late middle games. Show more

DOI: 10.3233/ICG-1998-21403

Citation: ICGA Journal, vol. 21, no. 4, pp. 228-244, 1998

Authors: Hartmann, D.

Article Type: Book Review

DOI: 10.3233/ICG-1998-21404

Citation: ICGA Journal, vol. 21, no. 4, pp. 245-247, 1998

Article Type: Other

DOI: 10.3233/ICG-1998-21405

Citation: ICGA Journal, vol. 21, no. 4, pp. 247-247, 1998

Article Type: Other

DOI: 10.3233/ICG-1998-21406

Citation: ICGA Journal, vol. 21, no. 4, pp. 248-248, 1998

Authors: Jimenez, E.

Article Type: Other

DOI: 10.3233/ICG-1998-21407

Citation: ICGA Journal, vol. 21, no. 4, pp. 249-251, 1998

Authors: van der Storm, Th.

Article Type: Other

DOI: 10.3233/ICG-1998-21408

Citation: ICGA Journal, vol. 21, no. 4, pp. 252-254, 1998

Authors: Uiterwijk, J.

Article Type: Other

DOI: 10.3233/ICG-1998-21409

Citation: ICGA Journal, vol. 21, no. 4, pp. 254-255, 1998

Authors: Frank, I. | Grimbergen, R.

Article Type: Other

DOI: 10.3233/ICG-1998-21410

Citation: ICGA Journal, vol. 21, no. 4, pp. 256-265, 1998

Authors: Monien, B. | Feldmann, R.

Article Type: Other

DOI: 10.3233/ICG-1998-21411

Citation: ICGA Journal, vol. 21, no. 4, pp. 266-266, 1998

Article Type: Other

DOI: 10.3233/ICG-1998-21412

Citation: ICGA Journal, vol. 21, no. 4, pp. 267-268, 1998

Article Type: Other

DOI: 10.3233/ICG-1998-21413

Citation: ICGA Journal, vol. 21, no. 4, pp. 269-271, 1998

Authors: van den Herik, H.H.J. | Monien, B.

Article Type: Other

DOI: 10.3233/ICG-1998-21414

Citation: ICGA Journal, vol. 21, no. 4, pp. 271-272, 1998

Authors: de Voogt, A.

Article Type: Other

DOI: 10.3233/ICG-1998-21415

Citation: ICGA Journal, vol. 21, no. 4, pp. 272-272, 1998

Authors: Karlsson, T.

Article Type: Other

DOI: 10.3233/ICG-1998-21416

Citation: ICGA Journal, vol. 21, no. 4, pp. 273-273, 1998

Article Type: Other

DOI: 10.3233/ICG-1998-21417

Citation: ICGA Journal, vol. 21, no. 4, pp. 274-274, 1998

Article Type: Other

DOI: 10.3233/ICG-1998-21418

Citation: ICGA Journal, vol. 21, no. 4, pp. 274-274, 1998

Article Type: Other

DOI: 10.3233/ICG-1998-21419

Citation: ICGA Journal, vol. 21, no. 4, pp. 274-275, 1998

Authors: AlthÖfer, I.

Article Type: Other

DOI: 10.3233/ICG-1998-21420

Citation: ICGA Journal, vol. 21, no. 4, pp. 275-275, 1998