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Subject: Re: What shortest mate that you can find for this position?

Author: Pete Galati

Date: 16:47:49 01/17/01

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On January 17, 2001 at 19:10:34, Paul wrote:

>On January 17, 2001 at 19:05:09, Dann Corbit wrote:
>
>>On January 17, 2001 at 18:59:19, Vincent Vega wrote:
>>
>>>On January 17, 2001 at 17:11:45, leonid wrote:
>>>
>>>>Hi!
>>>>
>>>>Position below contain mate. If you can find shortest mate that 11 moves (my
>>>>selective search can't find here below 11 and frute force search is too time
>>>>expensive), please say what you found.
>>>>
>>>>3k4/2bqb3/2qnq3/2nrn3/1Qqnq3/NBNq4/PPP2pR1/KB4R1 black to go.
>>>>
>>>>Leonid.
>>>
>>>This position is illegal.
>>
>>All right, leonid.  You heard the man.  You're under arrest!
>>;-)
>>
>>Since neither king is in check, I am curious why the position is not to be found
>>in the game of check.  It seems to add up OK to me.
>
>For black there are 5 Queens, 1 Bishop and 2 Knights extra. That's
>possible by 8 promo's ... but there's still a black pawn?
>
>But why spoil the fun, it's a nice position :)
>
>Paul

All illegal arguements aside, this is the first Checkmate Junior6 spit out,
about 64mb hash:

1...Qxb4! 2.Rg8+ Ne8 3.Ncb5 Qcxb5 4.R8g3 Ncxb3+ 5.axb3 Qxa3+ 6.bxa3 Nxc2+ 7.Bxc2
fxg1Q+ 8.Rxg1 Qc3+ 9.Kb1 Qexc2#
  -+  (-#9)   Depth: 11   00:01:11  35130kN
1...Qxb4 2.Rg8+ Ne8 3.Ncb5 Qcxb5 4.R8g3 Ncxb3+ 5.axb3 Qxa3+ 6.bxa3 Nxc2+ 7.Bxc2
fxg1Q+ 8.Rxg1 Qc3+ 9.Kb1 Qexc2#
  -+  (-#9)   Depth: 11   00:01:25  40493kN


I don't have a clue if this is the shortest posible mate.

Pete



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