Author: Christophe Theron
Date: 11:14:28 12/26/99
Go up one level in this thread
On December 26, 1999 at 11:47:10, Frederic Friedel wrote:
>On December 26, 1999 at 09:56:46, Enrique Irazoqui wrote:
>
>>>Very Very interesting, i adore this kind of stuff, i am beggining to try to
>>>solve this now, my english is regular, i like to confirn:
>>>
>>>
>>>1. e4 xx
>>>2. xx xx
>>>3. xx xx
>>>4. xx xx
>>>5. NxR++
>>>
>>>correct?
>>
>>It could also be 5...-NxR++. It may be more likely, given the way Frederic wrote
>>it.
>
>Enrique is exactly right. It _could_ be 5...NxR#, which gives you an extra ply.
>On the other hand he will confirm that, knowing me, it might just be 5.NxR#.
>
>BTW I posted this problem on http://slashdot.org (my favourite site) last night
>at 3.00 a.m. Twelve hours later I have over 100 emails from SlashDot visitors.
>Suddenly I realise what I should really be doing. There is a huge amount of
>interest for chess out there, in the real world.
>
>No correct solutions so far from SlashDot, just clever ones, like "Knight takes
>Rook, mate!" (i.e. buddy). One correct email solution from here (Alex, don't
>post it!). And a number of correct solutions from east German GMs after the
>puzzle appeared in ChessBase Magazine 73. Apparently it was known there.
After all this problem is only 9 or 10 plies deep. Many programs should be able
to solve it very quickly.
For example Fritz and Rebel-Tiger can go to ply depth 10 in only several
seconds.
Maybe I could add a line in my program to test, in case of checkmate, if the
last move was NxR, so I would quickly get the solution.
Maybe there are even several solutions to this problem.
Oops... I realize it would maybe not work. Probably the solution lays in a part
of the tree that is pruned early by alphabeta.
Christophe
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