Author: leonid
Date: 08:49:03 10/13/01
Go up one level in this thread
On October 13, 2001 at 07:54:07, Heiner Marxen wrote:
>On October 13, 2001 at 06:53:01, Paul wrote:
>
>>On October 12, 2001 at 12:50:01, leonid wrote:
>>
>>>[D]3n1K2/krbb1P1P/3n1Q1R/1R1r1Q1Q/1R3B1q/1NNQPB1q/7q/qqqqq2q w - -
>>>
>>>Please indicate your result.
>>>
>>>Thanks,
>>>Leonid.
>>
>>Hi,
>>
>>It took Pretz (& me) quite some time to find anything at all:
>>
>>15:14 WM11 12 Rxb7+ N8xb7 Qfxd5 Bc6 Qa5+ Qxa5 Qxa5+ Bxa5 Qfd4+ Bb6 Qxb6+ Kb8
>>Qxb7+ Bxb7 Rxb7+ Kc8 Qc4+ Nxc4 Rb8+ Kd7 Nc5#
>>
>>My 'standard-Leonid-settings' didn't do the trick here, so I had to fiddle
>>around a bit to get this ... great position.
>>
>>Groetjes,
>>Paul
>
>Hello Leonid, Hello Paul,
>
>Chest (& me) did not come up with as much: after 7.4 hours on a K7/600 with
>350 MB hash Chest mutters "No solution in 9 moves." Here is the timing:
>
># 1 0.00s 0kN 0.87 1- 0
># 2 0.00s 0kN 1.00 1- 0
># 3 0.02s 0kN [ 17.14] 0.94 78- 0
># 4 0.40s [ 20.00] 14kN [ 37.71] 0.98 2163- 0
># 5 4.78s [ 11.95] 176kN [ 12.98] 1.15 26250- 0
># 6 46.01s [ 9.63] 1834kN [ 10.40] 1.37 251710- 0
># 7 385.66s [ 8.38] 15395kN [ 8.40] 1.76 2171527- 92
># 8 3094.26s [ 8.02] 121911kN [ 7.92] 2.20 16929195- 8186873
># 9 26545.93s [ 8.58] 1016749kN [ 8.34] 2.27 148520619- 13977271
>
>As you can see, the next level would be 8.5 times as long. Someone with a
>faster CPU may want to try it. Starting with mere 77 legal moves an EBF
>above 8 is just a bit too much. Otherwise there were no surprises in the
>full statistics... a typical "lion" (== Leonid's creature :-).
Thanks, Heiner!
You went farther that me. I stopped after 7 move, since it took already 12 min
and 12 sec.
Selective found mate in 11 moves. Now only 10 move is a mystery.
Brute force:
Moves Time Branching NPS (nodes/second)
4 0.439 sec 47k
7.87
5 3.2 95k
12.31
6 42 sec 81k
17.16
7 12 min 12 sec 80k
Celeron 600Mhz. No hash.
Cheers,
Leonid.
>Cheers,
>Heiner
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