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Subject: Re: TWO new solutions to WAC.274

Author: Uri Blass

Date: 00:30:15 09/13/01

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On September 13, 2001 at 03:15:31, Bruce Moreland wrote:

>On September 13, 2001 at 00:29:17, Dann Corbit wrote:
>
>>On September 13, 2001 at 00:00:02, Bruce Moreland wrote:
>>
>>>All you are doing is considering the root position solved, and allowing any move
>>>that does anything, which is ridiculous.
>>>
>>>The key move trades down to an obviously won ending.  The other moves let you
>>>stay up a piece, without clarifying anything.
>>>
>>>My program analyzes Rg5+ was +3, without taking any material off the board.  Rb6
>>>is +4, according to it.
>>>
>>>This one seems semi-positional, but if Crafty is going to live by positional
>>>solutions, it needs to die by them as well.
>>
>>I would be very interested to see what your program says upon analyzing this
>>position overnight.
>>
>>I think it is a won ending (Rg5+) but I do have terrible intuition.  I also
>>intend to study it carefully.
>
>If the point of Rg5+ is to trade pawns, this doesn't seem like a very good
>solution.  The solution where you've got a king, knight, and pawns, versus king
>and some pawns, is pretty hard to beat.
>
>bruce

I believe that Rg5+ wins a pawn if you search deep enough.

A possible line is 1.Rg5+ b5 2.axb5 axb5 3.Rg8 c3 4.Nd3 Rc4 5.Rg6 Ra4+ 6.Kb3 Ra1
7.Rd6 when black cannot protece d4.

The point of Rg5+ is to win material without trading c2 and not to trade pawns.

I still prefer 1.Rb6 because rb6 wins also the same material.

Uri



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