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Subject: Re: Mate in 8

Author: Heiner Marxen

Date: 14:36:46 04/01/02

Go up one level in this thread


On April 01, 2002 at 13:50:28, Miguel A. Ballicora wrote:

>On April 01, 2002 at 13:39:12, Uri Blass wrote:
>
>>On April 01, 2002 at 13:31:42, Michael Vox wrote:
>>
>>>On April 01, 2002 at 12:29:44, Art Basham wrote:
>>>
>>>>Here is one I made up for the fun of it...:-)
>>>>(more than one solution)...
>>>>
>
>>>Both F7 and J7 find mate in about 26 moves, not 8 moves!!  They both want 1. Bf5
>>
>>
>>It is a tablebases position and I guess that if you use the KBN vs KP tablebases
>>they can find the right moves.
>>
>>It is clear that you use the KBN vs K tablebases but not the KBN vs K tablebases
>>and in this case they have no chance to see the mate in 6 because they stop to
>>search after finding mate.
>
>Lets try this then:
>Miguel
>
>[D]7k/7p/8/6KN/8/p6B/P7/8 w - -
>
>
>>Uri

Does not change much for Chest (without any EGTBs): same PVs, same solution
trees, but slightly slower for this one: 13.40 --> 14.00 secs

PV: Be6 h6+ Kf6 Kh7 Bf7 Kh8 Ke7 Kh7 Kf8 Kh8 Nf4 h5 Bg8 h4 Ng6#
PV: Kf6 h6 Be6 Kh7 Bf7 Kh8 Ke7 Kh7 Kf8 Kh8 Nf4 h5 Bg8 h4 Ng6#

Cheers,
Heiner



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