Author: Uri Blass
Date: 04:14:13 01/15/06
Go up one level in this thread
On January 15, 2006 at 05:30:18, Tony Werten wrote: >On January 14, 2006 at 14:25:38, Marc Bourzutschky wrote: > >>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. > >I think you are wrong here. > >There are basicly 2 possibilities. The Nalimov egtb says <=282 or it says <282 >:) > >Suppose the Nalimov line is correct (wrt 50 move counter). DTC might try to >capture all oponent pieces missing a shorter mate and needing more moves. It >will never need less moves. result: Nalimov <=282 You miss the fact that based on DTC the line is 288 moves. The first capture is after 282 moves and this is the reason for the title. We do not know if the distance to mate is smaller or bigger than 288 moves because it is possible that without capture white can mate earlier(less than 288 moves) and it is possible that by allowing a capture at move 260 black can lose later and be mated only in 290 moves. Uri
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.