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Subject: Re: Does this position blow up your program?

Author: John Lowe

Date: 21:51:57 12/24/02

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On December 24, 2002 at 18:11:51, Martin Giepmans wrote:

>On December 24, 2002 at 12:32:55, John Lowe wrote:
>
>>On December 23, 2002 at 15:37:07, Martin Giepmans wrote:
>>
>>>On December 23, 2002 at 15:16:44, Mike Byrne wrote:
>>>
>>>>[d]R6R/3Q4/1Q4Q1/4Q3/2Q4Q/Q4Q2/pp1Q4/kBNN1KB1 w - - 0 1
>>>>
>>>>So far , every Palm program and Chess Tiger have fatal errors with this
>>>>position.  Supossedly, this is the largest number of  possible legal number of
>>>>moves, 218, available from one position in chess.  If you can prove this wrong,
>>>>you'll go down in History.
>>>>
>>>>http://www.rescon.de/Compu/schachzahl2_e.html
>>>
>>>
>>>"Qd2xb2 mate!" says my program. 29 nodes calculated to find this brilliancy.
>>>
>>>It didn't blow up, the monitor didn't explode in my face, the AMD-processor
>>>didn't implode, even my cigarette didn't catch fire ...
>>>
>>>I must say that I find this at least a little bit disappointing ;)
>>>
>>>Martin
>>
>>Hi Martin,
>>
>>You can borrow my failure if you like.
>
>Thanks!  Do you really want it back?
>>
>>How did you manage to calculate 29 nodes before you found a mate in one?
>
>I don't know if you grinned when you wrote that.
>Do you mean that 29 is way too much for a mate in (only) one <grin>
>or do you mean that 29 is not enough?
>
>Martin

Of course I grinned. The whole position is a party game.

I'm trying to imagine which order you would have to evaluate moves in to have 28
misses before finding one of the mates.

My program generates little piece moves first and would have stumbled over the
knight mate - then it would(irrationally) have finished all the moves and
selected its favourite mate - which is why it crashed.....


Happy Christmas



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