Author: Ralph E. Carter
Date: 07:47:13 12/24/98
Go up one level in this thread
On December 24, 1998 at 10:37:47, blass uri wrote:
>
>On December 24, 1998 at 09:12:05, Ralph E. Carter wrote:
>
>>>>Posted by James T. Walker on December 22, 1998 at 19:47:21:
>>>>
>>>>Bob I hope you see this and can explain. This is the Crafty 15.20 inside of
>>>>Nimzo 99 and inside Junior appears to work the same way. Notice the times it
>>>>takes for Crafty to move. When this is run under Winboard Crafty plays the
>>>>entire variation in only a few seconds. Notice Crafty takes 72 seconds to make
>>>>the Mate in 1 move. Crafty searches 10 ply for that move but notice that is
>>>>typical of all the moves. It's a mate in 7 I created several years ago (18) to
>>>>test some of the old dedicated chess computers.
>>>>
>>>>Event "?"]
>>>>[Site "?"]
>>>>[Date "????.??.??"]
>>>>[Round "?"]
>>>>[White "Crafty 15.20"]
>>>>[Black "?"]
>>>>[Result "*"]
>>>>[Annotator "Crafty 15.20"]
>>>>[SetUp "1"]
>>>>[FEN "1k6/1P3p2/K7/8/8/8/7P/8 w - - 0 1"]
>>>>[PlyCount "13"]
>>>>
>>>>{59392kB, nzbook.CTG. PentiumII
>>>>} 1. Kb6 {#7/12 46} 1... f5 {11} 2. h4 {#6/14 31} 2... f4 {1}
>>>>3. h5{#5/12 40} 3... f3 {1} 4. h6 {#4/11 39} 4... f2 {1}
>>>>5. h7 {#3/11 38} 5... f1=Q {27} 6. h8=Q+ {#2/10 11} 6... Qf8 {3} 7. Qxf8# {#1/10
>>>>72} *
>
>I tried this position with crafty15.18 as an engine for Junior5 in the analysis
>option and it found it in less then 1 second the mate in 7
> I think that the times are not right and they are only time of performing the
>move and not times of doing the moves.
>
>Crafty15.18 feels a duty to continue to search even after it finds a mate in 1.
>
>Crafty can play the moves fast if you give it a short time control and play the
>moves slow if you give it long time control.
>
>I think that this has nothing to do with clearing the hash tables because even
>in a new position every program has no problem in finding mate in 1 in 0 seconds
>
>Uri
Perhaps the problem is caused by something ELSE. I hope the ELSE is discovered,
and posted here, so everyone will know about this.
PII-300 game/25, crafty
Mate in: Time under CB interface:
#7/18 57
#6/12 40
#5/12 39
#4/9 38
#3/9 37
#2/3 34
#1/3 34
PII-300 game/25, crafty
Mate in: Time under Winboard:
#7/18 1
#6/12 0
#5/12 0
#4/9 0
#3/9 0
#2/3 0
#1/3 0
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