Author: Dan Newman
Date: 17:43:04 05/30/01
Go up one level in this thread
On May 30, 2001 at 06:47:33, leonid wrote:
>Hello!
>
>If you like to solve "usual" mate then try this:
>
>[D]q2k2q1/2nqn2b/1n1P1n1b/2rnr2Q/1NQ1QN1Q/3Q3B/2RQR2B/Q2K2Q1 w - -
>
>Take care, if you will go to solve this position on some good professional
>program. There could be some problem. Just before coming here, I printed this
>position for me on one excellent program. Then, just by curiosity, I pushed
>button to make program look into it. Instantly, some kind of error massage came
>as response. Initial number of moves for this position is not even 100 to run
>program wild.
>
>Please, indicate your result.
>
>Thanks,
>Leonid.
This one is really weird: 22 million nodes on the two ply search :).
I can't quite figure out why the qsearch only blows up so badly on
that iteration and not the following ones...
Shrike Version 1.59a
2. 3817 52.26 22163408 dxc7+ Rxc7 Qxa8+ Nxa8 Bxd7 Rxc4 <QS>
3+ 3835 52.32 22187909 dxc7 <Fail High>
3. 3845 52.47 22267989 dxc7+ Rxc7 Qxa8+ Nxa8 Qxg8+ Nfxg8 Bxd7 Bxe4 <QS>
4. 3846 53.26 22576769 dxc7+ Rxc7 Qxg8+ Nfxg8 Qxc7+ Nxc7 Qxd7+ Nxd7 Qexa
8+ Nxa8
Rxe5 Bxc2+ Kxc2 <QS>
5. 3845 56.24 23923210 dxc7+ Rxc7 Qxg8+ Bxg8 Qxa8+ Nxa8 Bxd7 Nxe4 <QS>
5+ 3846 56.94 24282425 Qxg8 <Fail High>
5+ 3863 57.14 24365444 Qxg8 <Fail High>
5. 4220 57.79 24654464 Qxg8+ Bxg8 Qaxe5 Rxc4 dxe7+ Kc8 Bxd7+ Nbxd7 <QS>
6- 4202 58.92 25175097 Qxg8 <Fail Low>
6. 4215 59.79 25606079 Qxg8+ Bxg8 Qaxe5 Nxe4 dxe7+ Kc8 Bxd7+ Nxd7 Ra2 <Q
S>
7+ 4233 1:05 28521207 Qxg8 <Fail High>
7. 4652 1:09 30531132 Qxg8+ Bxg8 dxe7+ Qxe7 Qxa8+ Ncxa8 Qxc5 Qxc5 Qxf6+
Qe7
Nc6+ Kc7 Nxe7+ <QS>
7+ 4653 1:18 36602223 dxc7 <Fail High>
7+ 4670 1:20 37407433 dxc7 <Fail High>
7. +mate9 1:22 39668663 dxc7+ Rxc7 Qxc7+ Qxc7 Qxa8+ Nxa8 Qdxd5+ Nfxd5 Qdx
d5+ Rxd5+
Qexd5+ Qxd5+ Qxd5+ Ke8 Qxe7+ Qxe7 Rc8# <Checkmate
>
Shrike quits when it gets a mate on a test problem, so I don't know how much
longer to get mate in 8.
-Dan.
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