Author: Christophe Theron
Date: 20:15:15 04/24/02
Go up one level in this thread
On April 24, 2002 at 01:07:42, J. C. Boco wrote:
>I notice that the opening book for Chess Tiger has 8000 positions. There have
>been a handful of posts (in the archives) complaining about the small opening
>book--demonstrations of how ChessTiger misplayed an opening and suffers a bad
>evaluation because of an opening hole.
>
>When I purchased RebelCentury for the first time several years ago, I was very
>pleased to learn that I could use a database of chess games (from strong
>players) for the opening book ((and if you ask me to define "strong players", a
>majority of them were 2500-2600)). This offers a wonderful oppurtunity to play
>a varied game- most of the time strong theory was played against you, and if
>sometimes a suboptimal line was played I enjoyed the variety.
>
>ChessTiger has had its 8000 position book for many months now (over a
>half-year?). I suggest an easy way to significantly increase the opening book:
>Compile a database of games played with ELO>2500. How many games would fit into
>8MB on a palm? If I recall correctly, when I loaded Rebel's ~500,000 game
>database it took up about 110MB. If the correlation between PC and Palm memory
>holds, then an 8MB palm should hold about 7% or 35,000 games. If the first
>10-15 moves of each game is used as an opening book (perhaps more in sharper
>openings?) that would give a lowball estimate of a 350,000 position opening book
>for your palm running ChessTiger.
>
>The concept seems simple, and I present it in good faith. From my few posts in
>the past you will know that I have no real computer experience, so if there are
>simple technical objections or programming-headaches with this idea then chalk
>up my naive suggestiong to ignorance.
The only problem is that, because of some design choices, currently Chess Tiger
for Palm is limited to 8000 moves of opening positions.
It comes from some 64Kb limit of the PalmOS.
This limit will disappear in a future version of Chess Tiger for Palm, and when
it is done I will provide a much bigger opening book (for those who want to
download it) as an optional download (the small book or an improved version of
it will still be provided as the default).
Christophe
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