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Subject: Black to move and draw (should be easier for programs?)

Author: Roy Eassa

Date: 10:40:13 04/01/02

[d] 8/8/5kpp/3K1p2/5P2/7P/6P1/8 b - - 0 1
Black to move and draw.

I would think this would be trivially easy for today's programs running on fast
PCs, but (maybe) it isn't.  There are only two first moves for Black that draw;
everything else loses:

1...g5!

   [also drawing is 1...Kf7 2.Kd6
      (2.h4 g5 3.h5 gxf4 4.Ke5 Ke7 5.Kxf5 Kf7 6.Kxf4 Kf6 7.g3 Ke6 =)
    2...Kf6 3.h4 g5 4.g3 Kg6 5.hxg5
       (5.Ke6 g4=)
    5...hxg5 6.Ke6 gxf4 7.gxf4 Kg7 8.Kxf5 Kf7 =]

   [1...h5? 2.h4 +-
      (2.g3 also wins)]

   [1...Ke7? 2.Ke5+-]

2.g3 g4 3.h4

   [3.hxg4 fxg4 and Black pushes the pawn to h4 for a simple draw.]

3...Kg6 4.Ke5 Kh5 =

• Re: Black to move and draw (should be easier for programs?) John Merlino 10:50:49 04/02/02
• Re: Black to move and draw (should be easier for programs?) Kurt Utzinger 13:38:35 04/01/02
• Re: Black to move and draw (should be easier for programs?) Dieter Buerssner 11:36:35 04/01/02
  • Re: Black to move and draw (should be easier for programs?) Roy Eassa 12:49:28 04/01/02
    • Re: Black to move and draw (should be easier for programs?) martin fierz 14:31:49 04/01/02
      • Re: Black to move and draw (should be easier for programs?) Uri Blass 14:47:34 04/01/02

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