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Subject: Re: One easy mate to solve.

Author: leonid

Date: 18:12:41 08/16/01

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On August 16, 2001 at 20:03:13, Heiner Marxen wrote:

>On August 16, 2001 at 19:24:33, leonid wrote:
>
>>On August 16, 2001 at 16:47:03, Heiner Marxen wrote:
>>
>>>On August 16, 2001 at 12:03:51, leonid wrote:
>>>
>>>>Hi!
>>>>
>>>>This position is intended to be solvable by every program, after only minor
>>>>resistance.
>>>>
>>>>[D]1rrbbq2/3k4/1qqpnq2/3B4/2NPR3/1QB1KQ2/QN3PQQ/Q5QR w - -
>>>>
>>>>Please indicate your result.
>>>>
>>>>Thanks,
>>>>Leonid.
>>>
>>>Hello Leonid!
>>>
>>>You should try to find titles for your beautiful creations!
>>>For this one I suggest "The King", for obvious reasons  :-)
>>
>>Hi, Heiner!
>>
>>Is my pleasure to see you once again.
>>
>>This last position is in reality Chinese character that signify "Day". I thought
>
>Hey, that is even better than I imagined!  Lovely!
>
>>that it is not correct that I use only Latin letters as position form. Actually
>>today I put "Day" instead of "Middle" that is too much deeper in its solutiion.
>>"Middle" will come next.
>
>I'll have to delay my work on it until I'm done with "US" :-(
>Hopefully I will catch up, one day :-)
>I will not miss any of your creations!  :-)
>
>>>I've not yet worked on this new creation of yours, since my K7/600 after
>>>60 hours is still busy crunching on your corrected "US".
>>>http://www.icdchess.com/forums/1/message.shtml?183489
>>>I know, you warned us :-) but I thought that would not apply to Chest.
>>>That there is no mate in 8 needed only 40 minutes with an apparent EBF
>>>below 10, so I expected less than 10 hours.  But this one is a hard nut
>>>for Chest.  I have done some investigations into the variants Chest does
>>>compute... and I'm not pleased.  There are lots of partial solutions
>>>within the tree, and there are quiet white moves involved.  The trees
>>>get really huge :-(
>>>
>>>So... that "US" appears to be a good example for a problem where Chest
>>>does not do very well.  I will try to use it to improve Chest, but I'm
>>>not yet sure, how exactly that improvement has to look like.
>>
>>Absolutely the same impression I have when I see some solutions that your mate
>>solver find. Tried even to imagin some possible ways to push my solver farther
>>but until now not went to my code. Still the most attractive for me is my dream
>>to start Linux learning and eventually rewrite everything for 64 bits chip.
>>Fascinating!!!
>>
>>Heiner, I tried "US" on few strong program and branching factor went there
>>beyond 100. Maybe this will make you feel better.
>
>Umm, Uhh, 100+, well, yes!  Now I feel better indeed!
>
>>>Anyway, many thanks for your creations!  They _are_ helpful at least for me.
>>
>>They are helpful for both of us. Even if I was not that ready to restart my
>>writing, because of your presence, I speeded my mate solver twice since you are
>>here. Before I had no reason even to think that speeding mate solver have some
>>sense.
>
>So, a bit of competition is quite refreshing, isn't it?
>E.g. your "selective search" is already on my TODO list.  I want to be as
>fast as you are :-) :-)
>Also, I currently work on access to Nalimov EGTBs, in order to not be
>outsmarted by those "normal" programs :-)
>That competition makes me move, also.  Fine!

Heiner, I am asking me on what program all those Nalimove's positions were
calculated? Because if it use some program like we can see around, they miss a
lot in speed when dressing all those mate tables. It could be that dressing
table for 6 and 7 men is very realistic.

Cheers,
Leonid.


>Cheers,
>Heiner



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