Author: Tim Foden
Date: 00:53:52 04/19/01
Go up one level in this thread
On April 18, 2001 at 07:43:54, leonid wrote:
>On April 18, 2001 at 07:40:53, leonid wrote:
>
>>Hello!
>>
>>This mate can be found with every program. If you like, your can solve it.
>>
>>[D]1knb1N1Q/1rp1r1r1/Pp1PPN2/nPQ2p2/1N1qBBp1/1n6/R5b1/2R1K3 w - -
>>
>>Please indicate your result.
>>
>>If you happened to use Genius, Chess Master or Rebel, probably you could help
>>me. I know those programs as fearly correct in solving mate problems and I am
>>curious to see how much effective they are in reducing search time by using
>>hash table. If you could say me time for search, with hash and without, for
>>every of those programs it will nice. The best will be to indicate the time for
>>search by brute force for 4 and 5 moves deep. It will be enough.
>>
>>Thanks for your help,
>>
>>Leonid.
Well, I haven't got Genius, CM or Rebel, but I thought I'd give it a go anyway,
even though GreenLight was confused by your previous mate problem. :)
GLC says that N8d7+ is mate in 9 after 10 seconds.
Cheers, Tim.
Analysis (v2.14-pr7, 880MHz Duron, 48M hash):
>anal
Game stage: Opening
Current eval: 5.67
Ply Time Score Nodes Principal Variation
3 0.04 ++ 5888 Qxd4 (a=11.56 b=12.56 e=12.56)
3 0.05 13.316 10153 Qxd4 Nxd4 axb7 Bxe4 dxe7 Nf3+ Kd1
3 0.11 13.316 25410 Qxd4 Nxd4 axb7 Bxe4 dxe7 Nf3+ Kd1
4 0.15 12.987 32823 Qxd4 Nxd6 N6d7+ Rxd7 Nxd7+ Rxd7
4 0.27 12.987 85374 Qxd4 Nxd6 N6d7+ Rxd7 Nxd7+ Rxd7
5 0.33 ++ 101761 Qxd4 (a=12.49 b=13.49 e=13.49)
5 1.72 -- 740428 Qxd4 (a=13.49 b=321.00 e=13.49)
5 1.74 13.956 747753 Qxd4 Nxd6 N6d7+ Rxd7 Nxd7+ Rxd7 exd7 Nxd4 Bxb7
5 1.75 13.956 747876 Qxd4 Nxd6 N6d7+ Rxd7 Nxd7+ Rxd7 exd7 Nxd4 Bxb7
6 1.95 ++ 816353 Qxd4 (a=13.46 b=14.46 e=14.46)
6 2.22 15.561 921922 Qxd4 Nxd6 N8d7+ Rxd7 exd7 Nxd4 Qxd8+ Ka7 axb7 Nxb7
Bxb7 Bxb7 Bxc7
6 7.63 20.185 3014468 N8d7+ Rxd7 Nxd7+ Rxd7 dxc7+ Rdxc7 Bxc7+ Ka7 Nc6+
Ka8 axb7+ Kxb7 Nxd4+ Bxe4
6 8.43 20.185 3483264 N8d7+ Rxd7 Nxd7+ Rxd7 dxc7+ Rdxc7 Bxc7+ Ka7 Nc6+
Ka8 axb7+ Kxb7 Nxd4+ Bxe4
7 8.44 ++ 3486588 N8d7+ (a=19.68 b=20.68 e=20.68)
7 10.15 Mate09 4967198 N8d7+ Rxd7 Nxd7+ Rxd7 dxc7+ Rdxc7 Bxc7+ Ka7 Nc6+
Nxc6 axb7+ Qa4 bxc8=N+ Kb7 Qxc6+ Kxc8 Qxd8# <ht>
7 14.15 Mate09 8350544 N8d7+ Rxd7 Nxd7+ Rxd7 dxc7+ Rdxc7 Bxc7+ Ka7 Nc6+
Nxc6 axb7+ Qa4 bxc8=N+ Kb7 Qxc6+ Kxc8 Qxd8# <ht>
8 18.20 Mate09 11879k N8d7+ Rxd7 Nxd7+ Rxd7 dxc7+ Rdxc7 Bxc7+ Ka7 Nc6+
Nxc6 axb7+ Qa4 bxc8=N+ Kb7 Qxc6+ Kxc8 Qxd8#
8 40.41 Mate09 30918k N8d7+ Rxd7 Nxd7+ Rxd7 dxc7+ Rdxc7 Bxc7+ Ka7 Nc6+
Nxc6 axb7+ Qa4 bxc8=N+ Kb7 Qxc6+ Kxc8 Qxd8#
9 52.28 Mate09 41043k N8d7+ Rxd7 Nxd7+ Rxd7 dxc7+ Rdxc7 Bxc7+ Ka7 Nc6+
Nxc6 axb7+ Qa4 bxc8=N+ Kb7 Qxc6+ Kxc8 Qxd8# <ht>
9 1:37 Mate09 78904k N8d7+ Rxd7 Nxd7+ Rxd7 dxc7+ Rdxc7 Bxc7+ Ka7 Nc6+
Nxc6 axb7+ Qa4 bxc8=N+ Kb7 Qxc6+ Kxc8 Qxd8# <ht>
10 2:25 Mate09 120579k N8d7+ Rxd7 Nxd7+ Rxd7 dxc7+ Rdxc7 Bxc7+ Ka7 Nc6+
Nxc6 axb7+ Qa4 bxc8=N+ Kb7 Qxc6+ Kxc8 Qxd8#
10 5:55 Mate09 303108k N8d7+ Rxd7 Nxd7+ Rxd7 dxc7+ Rdxc7 Bxc7+ Ka7 Nc6+
Nxc6 axb7+ Qa4 bxc8=N+ Kb7 Qxc6+ Kxc8 Qxd8#
11 8:09 Mate09 423134k N8d7+ Rxd7 Nxd7+ Rxd7 dxc7+ Rdxc7 Bxc7+ Ka7 Nc6+
Nxc6 axb7+ Qa4 bxc8=N+ Kb7 Qxc6+ Kxc8 Qxd8# <ht>
11 10:20 1/71 dxc7+ >exit
local: t=10:27 nps=864854.5 n=542742056 (f=111433729 q=431308327)
total: t=10:27 nps=864854.5 n=542742056 draws=72102
trans: probes=67195976 hits=4952373 (7.37%) draft=2841268 (4.23%)
tcuts: exact=197 (0.00%) upper=928466 (1.38%) lower=1889721 (2.81%)
tstor: exact=813 (0.00%) upper=18743943 (63.97%) lower=10555328 (36.02%)
ext: check=40868504 recap=827260 ppush=9996189 1rep=2046913 thrt=0
q-moves: gen=8955270 tested=1676869 made/un=968733 max-dep=11
max eval diff: part-1=5.356 part-2=3.325
>
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