Author: leonid
Date: 07:40:07 08/27/02
Go up one level in this thread
On August 26, 2002 at 13:42:48, Heiner Marxen wrote:
>On August 24, 2002 at 19:07:09, leonid wrote:
>
>>Hi,
>>
>>Try to solve this position:
>>
>>[D]QQ1NrN1q/q1q3k1/Q3pp2/1qq3Bp/2B1n2K/P1b2Q1Q/2bR2qn/Q1Q1RrQ1 w - -
>>
>>Please indicate Your result.
>>
>>Thanks,
>>Leonid.
>
>Hi Leonid!
Hi, Heiner! It is pleasure to see You coming back.
Since I spoke to You last time, I still never went back to my programming. Lack
of time, money and exciting 64 bits chip that never come are the only exuses
that I am able to see.
>This one is not very easy. After 1.7 hours (Athlon 1500+, 128 MB hash)
>Chest mumbles "No solution in 10 moves". EBF was more above 9 than
>below 9:
The same for me. This position is not very easy but You was practically there.
It is mate in 11 moves.
># 4 0.03s 5kN [ 5.73] 1.07 498- 0
># 5 0.15s [ 5.00] 19kN [ 3.89] 1.31 1963- 0
># 6 1.40s [ 9.33] 191kN [ 10.11] 1.49 16196- 0
># 7 7.52s [ 5.37] 989kN [ 5.17] 2.10 82422- 0
># 8 70.36s [ 9.36] 9069kN [ 9.17] 2.08 794921- 30
># 9 684.64s [ 9.73] 83638kN [ 9.22] 2.65 7375123- 4176131
># 10 6106.19s [ 8.92] 763213kN [ 9.13] 2.85 60861895- 57662662
Your program did much better that mine between 9 and 10 moves. There my program
just became wild.
Celeron 600Mhz. No hash. LLchess. Brute force search.
Moves Time Branching factor NPS
4 0.659 sec 56k
3
5 1.978 sec 6.94
6.94
6 13.73 sec 72k
5.86
7 1 min 28 sec 69k
6.19
8 9 min 5 sec 73k
7.1
9 1 h 4 min 30 sec 117k
21.6
10 23 h 3 min 1 sec 123k
I did expected that somebody will come with selective solution, since mine (in
11 moves) was pretty slow. Usually I try to find position that is well populated
but still is very quick for selective. There is actually nobody beyond You and
Your program, that ever came with solution for my position.
Cheers,
Leonid.
>Therefore I will not continue to search deeper.
>
>Cheers,
>Heiner
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