Computer Games Workshop 2007
Computer Games Workshop 2007 Amsterdam, June 15{17, 2007 MAIN SPONSORS Preface We are pleased to present the proceedings of the Computer Games Workshop 2007, Amsterdam, June 15{17, 2007. This workshop will be held in conjunc- tion with the 12th Computer Olympiad and the 15th World Computer-Chess Championship. Although the announcement was quite late, we were pleased to receive no less than 24 contributions. After a \light" refereeing process 22 papers were accepted. We believe that they present a nice overview of state-of-the-art research in the ¯eld of computer games. The 22 accepted papers can be categorized into ¯ve groups, according to the type of games used. Chess and Chess-like Games In this group we have included two papers on Chess, one on Kriegspiel, and three on Shogi (Japanese Chess). Matej Guid and Ivan Bratko investigate in Factors A®ecting Diminishing Returns for Searching Deeper the phenomenon of diminishing returns for addi- tional search e®ort. Using the chess programs Crafty and Rybka on a large set of grandmaster games, they show that diminishing returns depend on (a) the value of positions, (b) the quality of the evaluation function, and (c) the phase of the game and the amount of material on the board. Matej Guid, Aritz P¶erez,and Ivan Bratko in How Trustworthy is Crafty's Analysis of Chess Champions? again used Crafty in an attempt at an objective assessment of the strength of chess grandmasters of di®erent times. They show that their analysis is trustworthy, and hardly depends on the strength of the chess program used, the search depth applied, or the size of the sets of positions used.
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