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Subject: Re: How to know which move the Rybka book would play?

Author: Vasik Rajlich

Date: 02:18:45 03/01/06

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On February 28, 2006 at 22:04:54, William Penn wrote:

>I've always used infinite mode for analysis. I've never used any other time
>control. And when it comes to books, I just look at their data in the window
>pane and make my best judgement, all things considered.
>
>Now enters a book where I would like to know which move it would play
>automatically (the new Rybka book) and I feel lost. I've never tried to
>determine that before. Infinite mode won't work for this.
>
>I set up everything per instructions in the readme file, but still I don't see
>how to get it to make the book move so I can see it. Of course I'm using the
>Chessbase/Fritz GUI (from Shredder 8). The best notion I have come up with is to
>set the time control for a "fixed time".
>
>So I load a correspondence game in progress that's still in the opening phase
>and try to determine what move the Rybka book would play here. I presume that
>when it starts thinking, it will play book moves immediately, which is how I can
>determine that it's a book move.
>
>But how do I get the engine to start thinking in "fixed time" mode for a
>particular position? Or maybe there's a better way to do this?
>
>I know you're gonna say to read the % column and look at the color of the moves
>(green or red). OK, but that's not the same as seeing the move made on the
>chessboard. I want to see it in action! :)
>
>Also, I came across one instance where I'm puzzled. There were only 2 sample
>games for the move that was played versus many sample games for the alternate,
>both green colored moves, but it played the former. I thought at least 3 sample
>games was necessary for it to play a book move?!
>WP

To instruct the GUI to play a book move in infinite analysis mode, make sure the
position is on the board, and press the space bar.

Note that the move played is not always deterministic. The right-most column in
the book pane gives you the % chance that each move will be played.

Vas



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