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Main
Date: 09 Dec 2006 22:47:20
From: Nimzovich fan
Subject: May have discovered a bug in Junior 10
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It was crushing another computer --- it had a queen, rook and knight vs. the
king--- it chased the black king around the board with 15 straight queen
checks before it announced mate-- very strange for a program of this
caliber.
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Date: 09 Dec 2006 23:56:41
From: johnny T
Subject: Re: May have discovered a bug in Junior 10
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Nimzovich fan wrote:
> It was crushing another computer --- it had a queen, rook and knight vs. the
> king--- it chased the black king around the board with 15 straight queen
> checks before it announced mate-- very strange for a program of this
> caliber.
Probably, but not a bug that the programmer cares about. This is picked
up by the tablebases.
Many programs will ignore the proper programming of endings like this,
because the work is already done in the tablebases.
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Date: 11 Dec 2006 10:06:40
From: David Richerby
Subject: Re: May have discovered a bug in Junior 10
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johnny T <[email protected] > wrote:
> Nimzovich fan wrote:
>> It was crushing another computer --- it had a queen, rook and
>> knight vs. the king--- it chased the black king around the board
>> with 15 straight queen checks before it announced mate-- very
>> strange for a program of this caliber.
>
> Probably, but not a bug that the programmer cares about. This is
> picked up by the tablebases.
>
> Many programs will ignore the proper programming of endings like
> this, because the work is already done in the tablebases.
Indeed. You may well find that Junior is unable to mate at all with
knight and bishop without using the tablebases. And why should it?
The engine is designed to be run with tablebases and there's no point
duplicating that functionality, given that more code means more bugs.
Dave.
--
David Richerby Zen Book (TM): it's like a romantic
www.chiark.greenend.org.uk/~davidr/ novel that puts you in touch with
the universe!
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Date: 10 Dec 2006 03:33:09
From: Nimzovich fan
Subject: Re: May have discovered a bug in Junior 10
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"johnny T" <[email protected] > wrote in message
news:[email protected]...
> Nimzovich fan wrote:
>> It was crushing another computer --- it had a queen, rook and knight vs.
>> the king--- it chased the black king around the board with 15 straight
>> queen checks before it announced mate-- very strange for a program of
>> this caliber.
>
> Probably, but not a bug that the programmer cares about. This is picked
> up by the tablebases.
>
> Many programs will ignore the proper programming of endings like this,
> because the work is already done in the tablebases.
Interesting... thanks for the info!
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