Author: Heiner Marxen
Date: 14:30:36 04/01/02
Go up one level in this thread
On April 01, 2002 at 14:01:12, Dann Corbit wrote:
>On April 01, 2002 at 13:54:02, Dieter Buerssner wrote:
>
>>On April 01, 2002 at 13:39:12, Uri Blass wrote:
>>
>>>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.
>>
>>A typo? Or is there really a mate in 6? If yes, this would probably indicate
>>some serious bug in my engine. I don't have the relevant TBs, but it should not
>>matter. BTW. Yace thinks, the 3rd best move is Bf1, with mate in 10. But here
>>the search depth is not be enough yet, to guarantee, that there is no other
>>shorter mate.
>>
>> 1. Bf1 Kg8 2. Kf6 h6 3. Ke7 Kh7 4. Kf7 Kh8 5.
>> Kf8 Kh7 6. Bd3+ Kh8 7. Nf6 h5 8. Ne8 h4 9. Nd6
>> h3 10. Nf7# {610}
>>
>>After Bf5, I get a mate of the same length:
>>
>>1...h6+ 2. Kf6 Kg8 3. Be6+ Kh8 4. Kf7 Kh7 5.
>>Bf5+ Kh8 6. Nf4 h5 7. Kf8 h4 8. Nd3 h3 9. Ne5
>>h2 10. Nf7# {-610}
>
>Analysis by Chest [ONE SECOND TO SOLUTION!]:
>E:\chest-3.24\chest>chest -b -+m -S --egtb-path=e:\programme\winboard\nalimov
>--egtb-mb=8 -z8 m7.epd
>% EGTB found tables for max 5 pieces
>% EGTB uses 48097.4K memory internally
>7k/7p/8/6KN/8/7B/8/8 w - - acn 37; acs 1; bm Be6 Kf6; ce 32752; dm 8; pv Be6 h6+
>Kf6 Kh7 Bf7 Kh8 Ke7 Kh7 Kf8 Kh8 Nf4 h5 Bg8 h4 Ng6#;
Even without any EGTBs and on my rusty K7/600 Chest needs not more than 13.4
secs to print the complete solution tree:
Be6 h6+ Kf6 Kh7 Bf7 Kh8 Ke7 Kh7 Kf8 Kh8 Nf4 Kh7 Bg8+ Kh8 Ng6#
h5 Bg8 h4 Ng6#
Kf7 Kh8 Kf8 Kh7 Bf7 Kh8 Nf4 Kh7 Bg8+ Kh8 Ng6#
h5 Bg8 h4 Ng6#
Kf6 h6 Be6 Kh7 Bf7 Kh8 Ke7 Kh7 Kf8 Kh8 Nf4 Kh7 Bg8+ Kh8 Ng6#
h5 Bg8 h4 Ng6#
Kf7 Kh8 Kf8 Kh7 Bf7 Kh8 Nf4 Kh7 Bg8+ Kh8 Ng6#
h5 Bg8 h4 Ng6#
Kf7 Kh7 Be6 Kh8 Kf8 Kh7 Bf7 Kh8 Nf4 Kh7 Bg8+ Kh8 Ng6#
h5 Bg8 h4 Ng6#
Bf5+ Kh8 Nf4 h5 Kf8 h4 Nd3 h3 Ne5 h2 Nf7#
Ne6 h3 Nd8 h2 Nf7#
Ng5 h2 Nf7#
Nd3 h4 Kf8 h3 Ne5 h2 Nf7#
Ne5 h3 Kf8 h2 Nf7#
Ne6 h4 Kf8 h3 Nd8 h2 Nf7#
Ng5 h2 Nf7#
Nd8 h3 Kf8 h2 Nf7#
Ng5 h3 Kf8 h2 Nf7#
Nh3 h4 Ng5 h3 Kf8 h2 Nf7#
Nf6 h5 Kf8 h4 Nd7 h3 Ne5 h2 Nf7#
Ne4 h3 Nd6 h2 Nf7#
Ng5 h2 Nf7#
Ne8 h3 Nd6 h2 Nf7#
Ng4 h3 Ne5 h2 Nf7#
Nh6 h2 Nf7#
Ng8 h3 Nh6 h2 Nf7#
Nh7 h3 Ng5 h2 Nf7#
Nd7 h4 Kf8 h3 Ne5 h2 Nf7#
Ne5 h3 Kf8 h2 Nf7#
Ne4 h4 Kf8 h3 Nd6 h2 Nf7#
Ng5 h2 Nf7#
Nd6 h3 Kf8 h2 Nf7#
Ng5 h3 Kf8 h2 Nf7#
Ne8 h4 Kf8 h3 Nd6 h2 Nf7#
Nd6 h3 Kf8 h2 Nf7#
Ng8 h4 Kf8 h3 Nh6 h2 Nf7#
Nh6 h3 Kf8 h2 Nf7#
Nh7 h4 Kf8 h3 Ng5 h2 Nf7#
Ng5 h3 Kf8 h2 Nf7#
Ng3 h5 Kf8 h4 Ne4 h3 Nd6 h2 Nf7#
Ng5 h2 Nf7#
Ne4 h4 Kf8 h3 Nd6 h2 Nf7#
Ng5 h2 Nf7#
Nd6 h3 Kf8 h2 Nf7#
Ng5 h3 Kf8 h2 Nf7#
Ng7 h5 Kf8 h4 Ne6 h3 Nd8 h2 Nf7#
Ng5 h2 Nf7#
Ne8 h3 Nd6 h2 Nf7#
Ne6 h4 Kf8 h3 Nd8 h2 Nf7#
Ng5 h2 Nf7#
Nd8 h3 Kf8 h2 Nf7#
Ng5 h3 Kf8 h2 Nf7#
Ne8 h4 Kf8 h3 Nd6 h2 Nf7#
Nd6 h3 Kf8 h2 Nf7#
Nf6+ Kh8 Bf5 h5 Kf8 h4 Nd7 h3 Ne5 h2 Nf7#
Ne4 h3 Nd6 h2 Nf7#
Ng5 h2 Nf7#
Ne8 h3 Nd6 h2 Nf7#
Ng4 h3 Ne5 h2 Nf7#
Nh6 h2 Nf7#
Ng8 h3 Nh6 h2 Nf7#
Nh7 h3 Ng5 h2 Nf7#
Nd7 h4 Kf8 h3 Ne5 h2 Nf7#
Ne5 h3 Kf8 h2 Nf7#
Ne4 h4 Kf8 h3 Nd6 h2 Nf7#
Ng5 h2 Nf7#
Nd6 h3 Kf8 h2 Nf7#
Ng5 h3 Kf8 h2 Nf7#
Ne8 h4 Kf8 h3 Nd6 h2 Nf7#
Nd6 h3 Kf8 h2 Nf7#
Ng8 h4 Kf8 h3 Nh6 h2 Nf7#
Nh6 h3 Kf8 h2 Nf7#
Nh7 h4 Kf8 h3 Ng5 h2 Nf7#
Ng5 h3 Kf8 h2 Nf7#
Kf8 h5 Bf5 h4 Nd7 h3 Ne5 h2 Nf7#
Ne4 h3 Nd6 h2 Nf7#
Ng5 h2 Nf7#
Ne8 h3 Nd6 h2 Nf7#
Ng4 h3 Ne5 h2 Nf7#
Nh6 h2 Nf7#
Ng8 h3 Nh6 h2 Nf7#
Nh7 h3 Ng5 h2 Nf7#
Ng8 Kh7 Bf5+ Kh8 Nh6 h4 Nf7#
h4 Bf5 h3 Nh6 h2 Nf7#
Nd7 Kh7 Bf5+ Kh8 Kf8 h5 Ne5 h4 Nf7#
Ne5 h5 Kf8 h4 Nf7#
h5 Bf5 h4 Kf8 h3 Ne5 h2 Nf7#
Ne5 h3 Kf8 h2 Nf7#
Ne4 Kh7 Bf5+ Kh8 Kf8 h5 Nd6 h4 Nf7#
Ng5 h4 Nf7#
Nd6 h5 Kf8 h4 Nf7#
h5 Bf5 h4 Kf8 h3 Nd6 h2 Nf7#
Ng5 h2 Nf7#
Nd6 h3 Kf8 h2 Nf7#
Ng5 h3 Kf8 h2 Nf7#
Ng5 h4 Bf5 h3 Kf8 h2 Nf7#
Ne8 Kh7 Bf5+ Kh8 Kf8 h5 Nd6 h4 Nf7#
Nd6 h5 Kf8 h4 Nf7#
h5 Bf5 h4 Kf8 h3 Nd6 h2 Nf7#
Nd6 h3 Kf8 h2 Nf7#
Ng8 Kh7 Bf5+ Kh8 Kf8 h5 Nh6 h4 Nf7#
h5 Bf5 h4 Kf8 h3 Nh6 h2 Nf7#
Nh6 h3 Kf8 h2 Nf7#
Kf8 Kh7 Bf5+ Kh8 Nh6 h4 Nf7#
h4 Bf5 h3 Nh6 h2 Nf7#
Ng7 Kh8 Bf5 h5 Kf8 h4 Ne6 h3 Nd8 h2 Nf7#
Ng5 h2 Nf7#
Ne8 h3 Nd6 h2 Nf7#
Ne6 h4 Kf8 h3 Nd8 h2 Nf7#
Ng5 h2 Nf7#
Nd8 h3 Kf8 h2 Nf7#
Ng5 h3 Kf8 h2 Nf7#
Ne8 h4 Kf8 h3 Nd6 h2 Nf7#
Nd6 h3 Kf8 h2 Nf7#
Kf8 Kh7 Bf5+ Kh8 Ne6 h5 Nd8 h4 Nf7#
Ng5 h4 Nf7#
Ne8 h5 Nd6 h4 Nf7#
h5 Bf5 h4 Ne6 h3 Nd8 h2 Nf7#
Ng5 h2 Nf7#
Ne8 h3 Nd6 h2 Nf7#
Ne6 Kh7 Bf5+ Kh8 Kf8 h5 Nd8 h4 Nf7#
Ng5 h4 Nf7#
Nd8 h5 Kf8 h4 Nf7#
h5 Bf5 h4 Kf8 h3 Nd8 h2 Nf7#
Ng5 h2 Nf7#
Nd8 h3 Kf8 h2 Nf7#
Ng5 h3 Kf8 h2 Nf7#
Ng5 h4 Bf5 h3 Kf8 h2 Nf7#
Ne8 Kh7 Bf5+ Kh8 Kf8 h5 Nd6 h4 Nf7#
Nd6 h5 Kf8 h4 Nf7#
h5 Bf5 h4 Kf8 h3 Nd6 h2 Nf7#
Nd6 h3 Kf8 h2 Nf7#
h5 Bf5+ Kh8 Kf8 h4 Ne6 h3 Nd8 h2 Nf7#
Ng5 h2 Nf7#
Ne8 h3 Nd6 h2 Nf7#
Ne6 h4 Kf8 h3 Nd8 h2 Nf7#
Ng5 h2 Nf7#
Nd8 h3 Kf8 h2 Nf7#
Ng5 h3 Kf8 h2 Nf7#
Ne8 h4 Kf8 h3 Nd6 h2 Nf7#
Nd6 h3 Kf8 h2 Nf7#
Kh6 Kf6 h4 Bg6 h3 Nf5#
Kg8 Be6+ Kh8 Nf4 h5 Kg6 h4 Kh6 h3 Ng6#
h6 Kg6 h5 Kh6 h4 Ng6#
Kf8 Bf7 h6 Nf4 h5 Ne6#
Ng6#
Ng7 h5 Ne6#
Ng7 h5 Bf7 h4 Ne6#
h6 Bf7 h5 Ne6#
So, the table bases appear to be correct (this time) :-))
Cheers,
Heiner
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