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Re: GNU Chess needs a "very easy" mode

From: Simon Waters
Subject: Re: GNU Chess needs a "very easy" mode
Date: Sun, 25 Nov 2007 19:23:51 +0000
User-agent: Mozilla-Thunderbird (X11/20070828)

Andreas Røsdal wrote:
> GNU Chess is used as AI by glChess in GNOME, and we quite frequently get
> bugreports that the AI is too difficult. Is there a way to force GNU
> Chess to be very easy on human players? (The easy and depth 1 options
> are not enough). For example make GNU Chess make deliberate mistakes at
> random.

Hi Andreas,

there is no way currently to force GNU Chess to play much weaker chess.

Previous advice has been to use less time, or supply "book worst" as the
book option (so it plays the opening less well - note "book worst" may
not be that weak as we try to throw bad moves out of the opening book,
so the worst line in book was probably tried by a GM at one point), use
"depth 1".

"depth 1" is currently flawed as it does a quiescent search, so whilst
it plays weak chess it avoids trivial exchange mistakes.

I believe "depth 1" doing too much is a genuine bug, and should be
fairly easy to fix, but hasn't been a priority. I'll take a look at it
as soon as I get done with the other bits I have to do this evening.


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