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Subject: Re: BWTC -- 16 toughest

Author: Bernhard Bauer

Date: 05:13:00 06/02/99

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On June 02, 1999 at 07:52:15, blass uri wrote:

>
>On June 02, 1999 at 06:58:04, Bernhard Bauer wrote:
>
>>On June 02, 1999 at 05:00:17, Dan Newman wrote:
>>
>>>Well, I tried mine out on these at 1 min / position on a P6/200
>>>and got the key move in 10 out of 16, but no mates.  I then tried
>>>them at 1/2 hr each and still got 10/16 and no mates.  Finally, I
>>>tried the first one for two hours -- still no mate...
>>>
>>>On the next to last (BWTC.0647) my program likes to force a
>>>repetition draw all the way through the 18 ply search -- no
>>>guarantee there isn't a mate though.
>>>
>>
>>This position is so simple and nice that you should have a look at it
>>and solve it yourselv. Not only your program fails, Crafty16.8 fails too.
>>I guess your program depends heavily on null move?
>>Oh, I'm missing the point again, sometimes I feel like a null-move-basher.
>>But as we all know such positions do *never* apear in practice, so why care?
>
>
>I do not believe that such positions never appear in practice.
>

Ah hmm ... do I?

>Junior has no problem to find the move but cannot find the mate because it does
>not use nalimov tablebases.
>
>I think that it is simple to find mate in X here.
>You only need to use the KQvs KPP tablebases and not to use the null move.
>

Looks like a mate in 16.
Kind regards
Bernhard

>Uri



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