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Subject: Re: Another monster endgame - kqnnkqn (282 moves)

Author: Marc Bourzutschky

Date: 11:25:38 01/14/06

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On January 14, 2006 at 13:15:20, Mark Rawlings wrote:

>On January 14, 2006 at 08:59:29, Marc Bourzutschky wrote:
>
>>kqnnkqn, while generally a draw, contains positions that require up to 282 moves
>>to capture or mate.  This brings it very close to the current record holder
>>krrnkrr which requires up to 290 moves.  kqnnkqb looks to be in third place now
>>with 272 moves, but that database has not yet been verified.  kqnnkqn took about
>>8.5 days to generate on a 3.8 GHZ Pentium machine, using Yakov Konoval's
>>program.
>>
>>Note that play after the capture on move 282 will not be the same as would be
>>obtained from a Nalimov database, because the latter maximizes distance to mate
>>rather than distance to mate or capture.
>
>So, in other words, if the Nalimov database was computed for this, it may be a
>mate in greater than 288, however there would be a capture in < 282, if I
>understand correctly?

All we know is that for a Nalimov database the mate would be in >= 282 moves.
If the mate is in > 282 moves, than there must be a capture in <= 282 moves.

-Marc



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