Author: Robert Hyatt
Date: 07:19:19 12/19/00
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On December 19, 2000 at 04:30:20, Ulrich Tuerke wrote: >On December 19, 2000 at 00:25:23, Robert Hyatt wrote: > >>[D]k1N5/2p5/8/1P6/8/8/7K/8 w - - 0 1 >>>id "HASH-03";c0 "dead drawn"; >> >>Are you sure the above is drawn? Crafty says Nb6+ and if cxb6 it is a >>mate in 20-something. If not, Na5 locks things up until the king gets >>over and wins... >> >> > >Thanks for the hint. You are perfectly right. >"Dead drawn" was the original comment in the article, where I had found this >position several years ago, and in fact - in the "pre-table-base-age", this >seemed to be true. >However, on modern hardware with tablebases, the win will be immediately >recognized, - even by my program. >Funny enough, in the "pre-table-base-pre-hashtable-age", programs ususally >considered this as a win for white (but not through Nb6). So , we need the table >bases to correct the wrong conclusion coming from trabsposition table anylysis ! > >Regards, Uli I don't think tablebases are needed. I first studied it by myself, and then used crafty on my notebook without tablebases. It found Nb6 almost instantly, but with no mate obviously, just +7 or so after some seconds. With tablebases, it is an instant mate in 25.
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