Author: David Dahlem
Date: 15:16:00 01/01/06
Go up one level in this thread
On January 01, 2006 at 14:28:34, Sune Larsson wrote:
>On January 01, 2006 at 13:29:53, David Dahlem wrote:
>
>>On January 01, 2006 at 10:31:07, Sune Larsson wrote:
>>
>>>Thanks David and Peter! This was excellent stuff. I thought there would be some
>>>documentation and history surrounding these positions. These evaluations of the
>>>Nunn positions are of course important to have in mind when we look at the
>>>results from the engines. Much appreciated! :-)
>>>
>>>/S
>>
>>Hi Sune
>>
>>I found a difference in one Nunn position in your suite and in my pgn. In your
>>position 2, the white king is on d4 with black to move. My pgn has the white
>>king on d3 with white to move. I don't know which one is correct. :-)
>
>
> ...for finding GM Nunn's original comments to the first 9 positions in our
> Endgame test suite! I have inserted them in the .pgn and also changed
> pos.2 to have the white king on d3 - and with w on the move.
>
> Maybe some people get awfully tired of all those posts with testpositions
> for endgames - but the testsuite should be okey now with 20 positions and
> comments to all in the .pgn. If you like I can post the final version - with
> the .pgn - or is that not needed?
>
> regards
> sune
It's not needed for me, but other users might appreciate it. :-)
And thank you for all your work on this suite.
Dave
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>>
>>8/1pk3pp/p7/3p1p2/3K4/6P1/PP2PP1P/8 b - - c0 "From John Nunn"; id "Sune Larsson
>>endgame 02";
>>
>>[Event "1/99-60 Budapest"]
>>[Site "Budapest"]
>>[Date "1952.??.??"]
>>[Round "?"]
>>[White "NET02: Barcza"]
>>[Black "Golombek"]
>>[Result "*"]
>>[Annotator "John Nunn"]
>>[SetUp "1"]
>>[FEN "8/1pk3pp/p7/3p1p2/8/3K2P1/PP2PP1P/8 w - - 0 1"]
>>[PlyCount "0"]
>>[EventDate "1952.??.??"]
>>
>>{This endgame certainly favours White. Black's pawn structure is inferior
>>because of the isolated d-pawn, while White's king is the first to occupy the
>>fourth rank. White has the obvious plan of putting his king on d4 followed by
>>using zugzwang to penetrate with his king to c5 or e5. This was in fact the plan
>>adopted by Barcza in the game, but accurate defence by Golombek enabled him to
>>hold the draw. Later (in 1966) Bondarevsky analysed the ending and concluded
>>that White could win with a different and far from obvious plan: playing Ke3,
>>threatening Kf4 and inducing Black to weaken his kingside pawn structure further
>>by playing ...g5. It is hard to say whether this is correct, but at any rate it
>>is clear that this position is finely poised between a draw and a win.} *
>>
>>Regards
>>Dave
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