Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: A difficult for computers test position

Author: Oreopoulos Kostas

Date: 13:38:18 01/07/04

Go up one level in this thread


On January 07, 2004 at 14:12:46, Robert Hyatt wrote:

>On January 07, 2004 at 13:28:32, Vincent Lejeune wrote:
>
>>On January 07, 2004 at 10:41:59, Robert Hyatt wrote:
>>
>>>On January 07, 2004 at 05:42:14, Oreopoulos Kostas wrote:
>>>
>>>>[D] 8/5k2/3p2pp/2pPp1p1/1pP3P1/4K3/1PB5/8 w - - 0 1
>>>>
>>>>This is an endgame position that occured in one of my games.
>>>>If white plays the correct move is Be4 blocking the e4 pawn and winning.
>>>>On any other move just e4 with a draw.
>>>>
>>>>Is there any chess program that considers Be4 or e4 if it is black to move?
>>>>
>>>>The idea is to move the king to c6 but if the e5 square is empty the black king
>>>>can walk in through e5.
>>>>
>>>>Tiger 15 does not find it
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>A question
>>>
>>>Black's h5 doesn't help, as white ignores it, and if black pushes to h4 creating
>>>a protected passer on h4, the white bishop holds it back.  After h5, gxh5 gives
>>>black an entry so white doesn't want to do that, but if he doesn't, can not
>>>black play hxg4 and now black has a king-side entry square if white tries to
>>>walk to the queen-side?  So I don't see how white is going to be able to leave
>>>the kingside with the white g-pawn gone, as black can push its g-pawn, make
>>>white sac the bishop for the first one, and then the second/third walk in.
>>>
>>>IE this looks drawn to me, without computer analysis.
>>>
>>>For example, you play Be4, I play h5.  Now what do you do to win?
>>>
>>>I may be overlooking something simple, as I didn't spend a lot of time
>>>looking, but it doesn't look promising to me...
>>
>>I analysed with hiarcs 9 and a friend (>2200) (yes i was the weakest part ;) )
>>
>>And we found 1.Be4 h5 2.Bf3! and white wins
>
>I still don't see it after looking at it for 5 minutes now myself.
>
>1. Be4 h5 2. Bf3 h4.
>
>Now what?
>
>I see two plans.  walk your king to queenside.  I do the same.  You pick off
>g6 pawn.  But how do you gain entry on queenside?  If you try to enter through
>e4-f5 my first cut says my king gets over there to prevent it.  And, during all
>the stuff you try, your bishop or king has to be able to get to h1 quick enough
>to hold my pawn at h4.  IE no more than 3 moves away at any point.
>
>It may well be winnable, but I don't see it myself.  Perhaps an hour with
>Crafty helping might show something...  But no time for that until maybe
>tonight.


If i get the g6 pawn i get an entry to the king side.
You cannot defend the f5 square. Just place the bishop to the e8 square. even
with the passed pawn i can enter f5 take g5 adn get the bishop in time to catch
the h pawn before the touch down.

BUT i can get in the queenside. You cannot prevent that. Opposition is not
enough i have a spare move with the bishop so i can get in
You can do that ONLY if you get the king to a6 or b6. This is NOT possible.
Just check it yourself




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.