simple? pawn ending

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BBauer
Posts: 658
Joined: Wed Mar 08, 2006 8:58 pm

Re: simple? pawn ending

Post by BBauer »

Hallo,

start with 1.d6 and win the queen ending.
The plack pawns are prey to the white king and in the end
black has no checks and looses.
Kind regards
Bernhard
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smirobth
Posts: 2307
Joined: Wed Mar 08, 2006 8:41 pm
Location: Brownsville Texas USA

Re: simple? pawn ending

Post by smirobth »

Werner wrote:Hi,
I did a longer evaluation with Deep Shredder 10 and after both engines had a queen the evaluation droppes down.

Maybe this is a draw position? Or can you show me please the way to win?
I just rechecked my old analysis to confirm that the position is not a draw. The way to win starts:
1.d6!! Kc8 2.Kf5 h3 3.Ke6 h2 4.d7+ Kb7 5.d8=Q h1=Q 6.Qc7+ Ka6 7.b7

[d] 8/1PQ5/k1p1K3/6p1/6P1/8/8/7q b - -

At this point Black has a lot of different checks, and so it takes a bit of maneuvering to demonstrate the win depending on what Black does, but the basic strategy for White is:

1) If not in check play b8=Q
2) If in check:
2a) first head over to the g5 pawn and capture it
2b) once the g5 pawn is gone head the king towards a8 to escape the checks.

The position is almost a perpetual (but not quite) so some engines will have trouble. The winning lines are quite deep so engines will not tend to show a winning score for quite a while. It will a great deal if you have the KQQKQP and KQPKQP tablebases.
- Robin Smith