Author: Uri Blass
Date: 10:40:56 02/04/04
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On February 04, 2004 at 13:34:30, Russell Reagan wrote: >On February 04, 2004 at 13:07:36, Ed Trice wrote: > >>I think Stiller had a DTC of 242 for one of his 6-piece endings (was it RN vs. >>NN?) and I do not recall what the longest DTM is. >> >>Also, I think with some of the 6/7 piece tablebases being built now use only DTC >>since DTM gets more difficult as you add pieces. >> >>Does anyone know what the longest DTM in chess happens to be? >> >>We now have a DTM of 269 in Gothic Chess, so I am wondering is this is the >>longest checkmate in any type of endgame database. > >You might have a look at Tim Krabbé's chess diaries: > >http://www.xs4all.nl/~timkr/chess2/diary.htm > >The one below addresses the issue you ask about, but it is from April of 2000, >so there might be some deeper ones discovered by now (although it is a 6-piece >ending). > >http://www.xs4all.nl/~timkr/chess2/diary_3.htm > >White has a mate in 262. > >[D]1N6/1RK5/5n2/8/8/8/5n2/6k1 w - - 0 1 This means that the position is drawn by the 50 move rule. The more interesting question is what is the longest possible forced mate in chess. If the opponent can stop the mate in the middle and claim a draw by the 50 move rule then there is no forced mate in chess(there is forced mate in similiar game that does not include the 50 move rule but I am more interested in chess). Uri
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