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Subject: Re: puzzling endgame

Author: Colin Frayn

Date: 14:17:26 03/03/02

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On March 03, 2002 at 17:00:03, Colin Frayn wrote:

>On March 03, 2002 at 15:44:41, Jon Dart wrote:
>
>>Recently Arasan had this position against Gandalf on ICC:
>>
>>[D] 8/p5kp/1pBnP1p1/8/8/P3P3/4K2P/8 w - -

I played through the PV here;

1. e4 Kf8 2. Kd3 Ke7 3. Bd7 Nb7 4. Kd4 Nc5 5. Ke5 a6 6. Bc8 Kd8

(each of these was preferred after 1 minute)

Then I got the following position;

[D] 2Bk4/7p/pp2P1p1/2n1K3/4P3/P7/7P/8 w - -

Finally Beowulf fails low here (though doesn't resolve within one minute).
Definitely some new endgame knowledge required I think.  Anyone have any
suggestions?

[7]W > comp
Current Position = 1.55
Number of Possible Moves = 12

 12    -11      61     158616   Bd7 Nxd7+ exd7 Kxd7 Kf6 Ke8 Ke6 b5 Kd6 g5 e5 h5
e6 a5 Kc5 Ke7
 13     -5     392    1051816   Bd7 Nxd7+ exd7 Kxd7 Kf6 Ke8 Ke6 b5 Kd6 g5 e5 h5
e6 g4
 14     -7     729    1952233   Bd7 Nxd7+ exd7 Kxd7 Kf6 Ke8 Ke6 g5 Kd6 h5 Kc6 b5
Kb6 Kf7 Kxa6
 15     -6    1688    4525345   Bd7 Nxd7+ exd7 Kxd7 Kf6 Ke8 Ke6 g5 Kd6 h5 Kc6 b5
Kb6 Kd7 Kxa6 Kc6 e5
 16   -105?   4095   11064951   a4 Kxc8 Kf6 Nxe4+ Ke5 b5 axb5 Nc5 Kf4 g5+ Kg4 h6
e7 Kd7 bxa6
 16   -105?   6000   16113020   a4 Kxc8 Kf6 Nxe4+ Ke5 b5 axb5 Nc5 Kf4 g5+ Kg4 h6
e7 Kd7 bxa6


Search Time : 60.01 Seconds
Total Nodes Searched   : 16113020  (65.4% Qui)
Total Nodes Evaluated  : 10536906
Cuts       : Delta    62002  : SEE      200273  : Mate          0
           : Razor   578428  : Eval    5413838
Extensions : Check   838883  : OneRep    37171  : CMThreat    212
           : Pawn    458988  : Recap     40397  : RevCheck 122224
Hash Stores (Size) : 2821860  (4194301)
Hash Probes (Hits) : 14100966  (4295929)
EGTB Probes (Hits) : 97  (97)
Move Ordering      : 81.8%
Best Move = a4



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