Author: Robert Hyatt
Date: 15:04:15 05/28/02
Go up one level in this thread
On May 28, 2002 at 16:54:31, Uri Blass wrote:
>On May 28, 2002 at 16:42:19, Sune Fischer wrote:
>
>>On May 28, 2002 at 16:35:33, Dieter Buerssner wrote:
>>
>>>On May 28, 2002 at 16:14:14, Uri Blass wrote:
>>>
>>>>If you do not have a condition of no repetition I can easily break that record.
>>>>
>>>>5b1k/4p1p1/4PpP1/5P2/2p5/1pPp4/1P1P4/rKB5 w - - 0 1
>>>
>>>Nice position. Before I tried to understand it, I tried it out (after
>>>recompiling Yace with a maxdepth of 1024). After no time, the depth was reached.
>>>But the maximum length of the line was only 4 plies. Another challenge would be,
>>>a position which triggers a really long line, that chess engines look at.
>>>
>>>Regards,
>>>Dieter
>>
>>Why do people search a position with 1 legal move?
>>Frenzee moves instantly on this one, search not even initiated.
>>
>>-S.
>
>The reason is Robert Hyatt's post.
>
>He talked about 32 consecutive only replies.
This won't break crafty at all. It searches exactly 4 plies deep (to get
a move to ponder that is sort of reliable) and then moves. It will _never_
search beyond 4 plies here unless it is pondering. There it will bottom
out at 60 plies almost instantly
nss depth time score variation (1)
1 0.00 -0.80 1. Kxa1
1-> 0.00 -0.80 1. Kxa1
2 0.00 -0.90 1. Kxa1 Kg8
2-> 0.00 -0.90 1. Kxa1 Kg8
3 0.00 -0.80 1. Kxa1 Kg8 2. Kb1
3-> 0.00 -0.80 1. Kxa1 Kg8 2. Kb1
4 0.00 -0.70 1. Kxa1 Kg8 2. Kb1 Kh8
4-> 0.00 -0.70 1. Kxa1 Kg8 2. Kb1 Kh8
time=0.00 cpu=100% mat=-5 n=22 fh=100% nps=10k
ext-> chk=0 cap=0 pp=0 1rep=0 mate=0
predicted=0 nodes=22 evals=7
endgame tablebase-> probes done=0 successful=0
SMP-> split=0 stop=0 data=0/64 cpu=0.01 elap=0.00
pondering: (note, to do this I played Kxa1 and crafty instantly played Kg8.
It then pondered my playing Kg1 and searched. This is the result.
55 0.01 0.00 2. ... Kh8 3. Ka1 Kg8
55-> 0.01 0.00 2. ... Kh8 3. Ka1 Kg8
56 0.01 0.00 2. ... Kh8 3. Ka1 Kg8
56-> 0.01 0.00 2. ... Kh8 3. Ka1 Kg8
57 0.01 0.00 2. ... Kh8 3. Ka1 Kg8
57-> 0.01 0.00 2. ... Kh8 3. Ka1 Kg8
58 0.01 0.00 2. ... Kh8 3. Ka1 Kg8
58-> 0.01 0.00 2. ... Kh8 3. Ka1 Kg8
59 0.01 0.00 2. ... Kh8 3. Ka1 Kg8
59-> 0.01 0.00 2. ... Kh8 3. Ka1 Kg8
60 0.01 0.00 2. ... Kh8 3. Ka1 Kg8
60-> 0.01 0.00 2. ... Kh8 3. Ka1 Kg8
time=0.01 cpu=0% mat=0 n=351 fh=100% nps=10k
>
>Here is a position with more than one legal move if I need to start from a
>position with more than one legal move.
>
>[D]r4b1k/4p1p1/4PpP1/5P2/2p5/1pPp4/1P1P4/QKB5 b - - 0 1
>
>Uri
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