Author: Dann Corbit
Date: 11:01:12 04/01/02
Go up one level in this thread
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#;
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.