wu :: forums - Print Page


    
      
        wu :: forums
        (http://www.ocf.berkeley.edu/~wwu/cgi-bin/yabb/YaBB.cgi)
      

        riddles >> general problem-solving / chatting / whatever >> Black to Play and Resign With a Sigh in 517 Moves!
        
(Message started by: THUDandBLUNDER on Jul 24^th, 2006, 3:49pm)

Title: Black to Play and Resign With a Sigh in 517 Moves!
Post by THUDandBLUNDER on Jul 24^th, 2006, 3:49pm

http://216.25.93.108/forum/viewtopic.php?topic_view=threads&p=19242&t=2860

You can replay the moves at:
http://www.xs4all.nl/~timkr/chess2/diary.htm (#316)
BTW, after 518. QxR+ Black is finally mated in a further 9 moves.

See also http://www.xs4all.nl/~timkr/chess/perfect.htm

Title: Re: Black to Play and Resign With a Sigh in 517 Mo
Post by towr on Jul 25^th, 2006, 12:15am

I think I'd rather give a draw than do 517 moves.

But isn't it a draw anyway if no piece is capture after 50 moves? With just 7 pieces on the board and 517 moves, you could finish it.
Still, a staggering computational result.

Title: Re: Black to Play and Resign With a Sigh in 517 Mo
Post by Grimbal on Jul 29^th, 2006, 2:31pm

And to think that the reason in some of the black moves might be to get a mate in 123 instead of a mate in 45. It is humanly impossible to comprehend.

Title: Re: Black to Play and Resign With a Sigh in 517 Mo
Post by THUDandBLUNDER on Jul 29^th, 2006, 3:15pm

on 07/25/06 at 00:15:53, towr wrote:

But isn't it a draw anyway if no piece is capture after 50 moves?

Yes, when the first small tablebases were produced (by Ken Thompson, co-creator of C) the rules were changed to allow for these positions. But they were then changed back when it was realized that the chance of any of these pawnless endgames arising in real games is very small.