Author: Ricardo Gibert
Date: 04:38:51 08/21/03
Go up one level in this thread
On August 21, 2003 at 07:18:47, Uri Blass wrote: >On August 21, 2003 at 07:06:20, Omid David Tabibi wrote: > >>On August 21, 2003 at 06:12:12, Jouni Uski wrote: >> >>>[D]8/1p6/1Pp2N1q/p1Ppk2p/P3p3/3PPpPp/3K1P1P/1R6 w - - >>> >>>From CSS forum: Machine should, within a million hours, be able to find the draw >>>in this position (with Ng4+). But Shredder 7.04 found it in one second!! >>> >> >>It is not a draw. The black queen will penetrate into the white cvamp via a6. >>For the past year I've been working on endgame blockage detection. I noticed >>that Shredder has some very limited form of blockage detection, but it is very >>inaccurate, and in many positions I tried, that inaccurate blockage detection >>wreaked havoc to the search tree. > >Wrong > >It is a draw >I also believed that it is not a draw but trying to win it >against shredder I got the following game > >[Event "?"] >[Site "?"] >[Date "????.??.??"] >[Round "?"] >[White "New game"] >[Black "?"] >[Result "*"] >[SetUp "1"] >[FEN "8/1p6/1Pp2N1q/p1Ppk2p/P3p3/3PPpPp/3K1P1P/1R6 w - - 0 1"] >[PlyCount "11"] > >1. Ng4+ hxg4 2. d4+ Ke6 3. Rh1 Qf8 4. Ke1 Qa8 5. Kf1 Qa6+ 6. >Kg1 and black cannot make progress > >Uri I'm impressed! You have a very sharp eye Uri! I'm afraid I embarassed myself on this one. Dang!
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