Author: Dieter Buerssner
Date: 11:52:20 10/06/03
Go up one level in this thread
On October 06, 2003 at 14:19:44, Robert Hyatt wrote:
>On October 06, 2003 at 13:59:30, Slater Wold wrote:
>
>>On October 06, 2003 at 13:56:33, Dann Corbit wrote:
>>
>>>On October 06, 2003 at 13:51:29, Slater Wold wrote:
>>>
>>>>[D]8/6NK/8/1Bk5/P5q1/8/8/8 w - - 0 107
>>>>
>>>>A lot of engines, after a lot of time can see this is lost.
>>>>
>>>>Crafty cannot.
>>>>
>>>>Any ideas on how to fix this? Other than waiting for Eugene to make the TB? :)
>>>
>>>Are you sure that it is lost?
>>>
>>>What is the sequence of moves that wins for black?
>>
>>Positive. Here's one engine's "proof":
>>
>>Nouvelle partie
^^^^^^^^^^^^^^^
French
>>8/6NK/8/1Bk5/P5q1/8/8/8 w - - 0 1
>>
>>Analysis by Hiarcs 9:
>>1.Rg8 Dg6 2.Fe8 Df6 3.Fb5 Rd4 4.Ce8 Df4
>> -+ (-#31) Profondeur: 27/62 00:26:04 791397kN, tb=2781311
>>
>>(, - 05.10.2003)
>
>
>
>I go to the end of your line and get nothing but draw scores.
> 17-> 2:11 -0.01 5. Bd7 Qg5+ 6. Kf8 Kc3 7. Bb5 Qc5+
> 8. Kg8 Kb4 9. Kh8 Qxb5 <EGTB>
I get:
3598654 5.495 -Mat34 14t 111. Bd7 Ke5 112. Kg7 Qd4 113. Bb5 Ke6+H 114.
Kh6H Qh4+H 115. Kg6H Qg4+H 116. Kh6H Ke7H 117.
Ng7H Qf4+H 118. Kh5H Qf3+H 119. Kh6H Qf6+H 120.
Kh7H Qg5H 121. Be2H Qh4+H 122. Kg6H Qxa4H
{EGTB} 123. Nf5+ Ke6! 124. Ng7+! Ke5! 125. Bh5!
Qd4 126. Ne8 Kf4! 127. Ng7! Qb6+! 128. Kf7!
Kg5! 129. Ne6+! Kxh5! 130. Kf6! Qd6 131. Kf5!
Qd5+! 132. Kf6! Kh4 133. Ng7 Qd6+ 134. Ne6 Kg4!
135. Kf7! Kf5 136. Ng7+! Ke5 137. Ke8! Qf6 138.
Nh5! Qg6+ 139. Ke7 Qxh5! 140. Kd7! Kd5! 141.
Ke7 Qg5+ 142. Kf7 Kd6! 143. Kf8! Ke6! 144. Ke8
Qg8# {-1001}
3598654 5.774 -Mat34 14. 111. Bd7 Ke5 112. Kg7 Qd4 113. Bb5 Ke6+ 114.
Kh6 Qh4+ 115. Kg6 Qg4+ 116. Kh6 Ke7 117. Ng7
Qf4+ 118. Kh5 Qf3+ 119. Kh6 Qf6+ 120. Kh7 Qg5
121. Be2 Qh4+ 122. Kg6 Qxa4 {EGTB} 123. Nf5+
Ke6! 124. Ng7+! Ke5! 125. Bh5! Qd4 126. Ne8
Kf4! 127. Ng7! Qb6+! 128. Kf7! Kg5! 129. Ne6+!
Kxh5! 130. Kf6! Qd6 131. Kf5! Qd5+! 132. Kf6!
Kh4 133. Ng7 Qd6+ 134. Ne6 Kg4! 135. Kf7! Kf5
136. Ng7+! Ke5 137. Ke8! Qf6 138. Nh5! Qg6+
139. Ke7 Qxh5! 140. Kd7! Kd5! 141. Ke7 Qg5+
142. Kf7 Kd6! 143. Kf8! Ke6! 144. Ke8 Qg8#
{-1001}
Note, that the moves in the PV that have initially a "H" attached are not
necessarily reliable.
>Note that your piece names are hard for us SAN folks to read. IE I know
>a Queen is a "D", but I thought a knight was a "S" and a bishop was a
>"L"??
You think of German piece letters. In French, R=king, F=bishop, C=knight
>Crafty reports draw scores all the way through starting at the initial
>position. I therefore have no idea what is wrong unless it is a simple
>matter of not extending in the right place to see some subtle threat.
I guess it may be a pruning/null move thing.
Regards,
Dieter
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