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Subject: Re: Here's a Mate Problem from Hell Found in CTF Thanks Dann!

Author: Vincent Lejeune

Date: 15:10:09 09/20/04

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On September 20, 2004 at 10:53:42, Daniel Jackson wrote:

>On September 19, 2004 at 17:46:14, Vincent Lejeune wrote:
>
>>On September 19, 2004 at 16:13:16, Daniel Jackson wrote:
>>
>>>On September 19, 2004 at 02:21:18, Dann Corbit wrote:
>>>
>>>>On September 19, 2004 at 02:11:37, Dann Corbit wrote:
>>>>
>>>>>On September 18, 2004 at 15:59:24, Daniel Jackson wrote:
>>>>>
>>>>>>[D]rnbqkbnr/qqqqqqqq/8/8/8/8/QQQQQQQQ/RNBQKBNR w
>>>>>
>>>>>So far, on ply 3 (85,070,720 nodes) Shredder 7.04 on a 2.2 GHz 64 bit AMD
>>>>>machine with 400 MB hash -- likes Qf2xf7+ with a score of +10.15
>>>>>
>>>>>I set it for 100,000 seconds and we'll see what it says on Monday.
>>>>
>>>>Finished ply 4 in about 11 minutes (br.f.~3) with the same key move and a score
>>>>of about +9 pawns.
>>>>
>>>>I estimate that it will finish ply 8 or 9.
>>>
>>>I appreciate the effort! Thank You! I don't know if anyone has tried or found a
>>>solution to this problem?
>>
>>I'll let TheKing (the emperor of chechmate) think overnight (may be more) on it,
>>after 1.Qaxf7 Qxf7
>
>Thanks Vincent!
>
>I think you may find the mate very deep, but I believe 1.Qaxf7 is most likely
>the *key* move...for the shortest route to a long mate. Maybe no program can
>find a mate this deep, and no human OTB?


Bad news, I let TK overnight on the position , when I go to work, I checked the
analysis : no mate (the line was : 1.Qaxf7+ Qxf7 2.Rxa7 ... score +8), I decided
to let the comp think until i go back from work, 9h later, when I checked the
engine come back to depth 1 !!
I decide to restart the analysis for this night after 1.Qaxf7+ Qxf7 2.Rxa7...



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