Author: leonid
Date: 05:47:07 05/14/01
Go up one level in this thread
On May 13, 2001 at 21:07:46, Heiner Marxen wrote:
>On May 13, 2001 at 11:42:22, leonid wrote:
>
>>Hello!
>>
>>If you want to solve one easy mate then this is the right one:
>>
>>[D]1BqQ4/nB6/1p2NQ2/kbbrNRRK/1p2NQ2/nB6/1BqQ4/8 w - -
>>
>>Please indicate your result.
>>
>>This night I wanted to solve few positions on Mate 2 but could not find how to
>>say exact number of moves to search and could not see the time. If you will
>>solve this position on Mate 2.0 (like me from Hiarcs package), or from some
>>other version of Mate, please say your time. If you happened to solve recently
>>on Mate some other mate positions, please put here, at least, one of them. Ideal
>>will be mate between 6 and 9 moves. Don't forget to mention hash of program and
>>speed of your computer.
>>
>>Thanks,
>>Leonid.
>
>Chest on a K7/600 with 350 MB hash (100 MB would have been enough this time)
>needs 589 seconds (10 minutes) to come up with 2 ley moves for "mate in 7".
>Since both are not checks, I give some more variants, not just the PVs:
Here we coincide almost like brothers. Even our branching factor look very close
but your is better. Somewhere we have more that similar structures inside of our
programs, I am almost sure about this. If you would like, you could see this on
yourself. CPU - Celeron 600Mhz.
4 moves - 0.66 sec
branching factor 9.4
5 moves - 6.2 sec
branching factor 15
6 moves - 1 min 32 sec
7 moves 21 min 41 sec. Mate found.
>N4xc5 Be8+ Kh6 Qxd2 Qxb6+ Kxb6 Nc4+ Nxc4 Bc7+ Qxc7 Qxc7+ Kb5 Ba6#
> Be2+ Kh6 Bc4 Qxb6+ Kxb6 Nc7+ Ka5 Qa6+ Bxa6 Qfxb4#
> Nc4 Nxc4+ Bxc4 Qxb6+ Kxb6 Nc7+ Ka5 Qa6+ Bxa6 Qfxb4#
> Q8xc5 Qxb6+ Kxb6 Nxc5+ Bc6 Ned7+ Rxd7 Qfxb4+ N3b5 Qa5#
> Qc3 Nc4+ Bxc4 Qxb6+ Kxb6 Bc7+ Qxc7 Qxc7+ Kb5 Ba6#
> Qd1+ Bxd1 Be2+ Qxe2 N7b5 Qxb5+ Kxb5 Nd4+ =*= Qfxb6#
> Qxd2 Qxb6+ Kxb6 Nc4+ Bxc4 Bc7+ Qxc7 Qxc7+ Kb5 Ba6#
> Rd4 Qxb6+ Kxb6 Nc4+ Bxc4 Nd8+ Ka5 Na4+ Q2xf5 Qb6#
> Rxd2 Qxb6+ Kxb6 Nc4+ Bxc4 Nd8+ Ka5 Na4+ Q2xf5 Qb6#
> Bc4 Qxb6+ Kxb6 Nc7+ Ka5 Qa6+ Bxa6 Qfxb4#
> Q2xc5 Nxc5 Be2+ Qxe2 Nc4 Nxc4+ Kb5 Qfxb6#
> Qc4 Nxc4+ Bxc4 Qxb4+ Kxb4 Bc3+ Kb5 Ba4#
> Qe4 Nc4+ Bxc4 Qxb4+ Kxb4 Bc3+ Kb5 Ba4#
> Nc6 Nxc6+ =*= Qfxb4#
> Qxb3 Nxb3+ Ka4 Qfxb4#
> -*- Qfxb4#
>
>N6xc5 Be2+ Ng4 Bxg4+ Kh6 Nc4 Qf1 Nb5 Qa1+ Nba3 Qxa3+ Kb5 Qaxb4#
> Be8+ Ng6 Bxg6+ Kh6 Nc4 Qf1 Nb5 Qa1+ Nba3 Qxa3+ Kb5 Qaxb4#
> Nc6 Nxc6+ Bxc6 Qxb6+ Kxb6 Qxb4+ Nb5 Ba7+ Kxa7 Qa5#
> Q8xc5 Nxc5 Qd1+ Qxd1 Bc6 Nxc6+ Nxc6 Na4 Kb5 Rxd5#
> Qc7 Nc6+ Bxc6 Qxb4+ Kxb4 Bc3+ Qxc3 Qxc3+ Kb5 Ba6#
> Qd1+ Bxd1 Be8+ Kh6 Bc6 Nb3+ Kb5 Nd6+ =*= Qfxb4#
> Qxd8 Qxb4+ Kxb4 Nc6+ Bxc6 Bc3+ Qxc3 Qxc3+ Kb5 Ba6#
> Rd6 Qxb4+ Kxb4 Nc6+ Bxc6 Nd2+ Ka5 Na6+ Q2xf5 Qb4#
> Rxd8 Qxb4+ Kxb4 Nc6+ Bxc6 Nd2+ Ka5 Qb4+ Kxb4 Na6#
> Bc6 Qxb4+ Kxb4 Nc3+ Ka5 Qa4+ Bxa4 Qfxb6#
> Q2xc5 Nxc5 Be2+ Qxe2 Nc4 Nxc4+ Kb5 Qfxb6#
> Qc6 Nxc6+ Bxc6 Qxb6+ Kxb6 Bc7+ Kb5 Ba6#
> Qe6 Nc6+ Bxc6 Qxb6+ Kxb6 Bc7+ Kb5 Ba6#
> Nc4 Nxc4+ =*= Qfxb6#
> Qxb7 Nxb7+ Ka6 Qfxb6#
> -*- Qfxb6#
>
>They are completely symetric (line 1 has no symetric counterpart).
>
>The effective branching factor of Chest is well above 10:
>
>depth seconds
># 1 0.00 0.87 1- 0
># 2 0.00 1.00 1- 0
># 3 0.03 0.97 88- 0
># 4 0.28 1.06 1103- 0
># 5 2.98 1.17 11673- 0
># 6 34.17 1.29 139710- 0
># 7 588.01 1.38 2086866- 69
>
>Also, the hash table did not contribute very much (factor 1.38).
>
>Cheers,
>Heiner
Hi, Heiner!
This time one personal demand. Can you send me your mate solver? I tried two
times to do this by going into your site but something I did in a wrong way.
I use Windows ME. If you have somewhere executive file, it will be the best. If
whatever you will need to find in my program, you will just ask and my response
will be instant.
Now I am in changing few thing in my mate solver and for this I need some
excellent mate solver as reference. It is not that simple to find as somebody
could imagine. Before I had the impression that Genius 2 could do the work but
later found that its moves number is fixed by 99 limit. The same is true for
other best chess programs and even, to my susprise, for mate solver Mate 2.0.
Mate 2.0 (he is in the package with Hiarcs program) do not permit to indicate
directly number of moves that you would like for him to see. Its number of moves
is once again limited to 99. He do not indicate the time when he think.
It could be that I don't know how to use it. Hiarcs is not very talkative as
programe in general. The best in its openess, between all program that I ever
used, is Rebel. If I will one day end my chess program then I will try to make
everything in my program as clear and accessible as this program did.
Cheers,
Leonid.
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