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Subject: Re: Disappointment as Fritz 5,6+Hiarcs fail to find this elegant move! WHY?

Author: Dann Corbit

Date: 17:14:08 05/09/00

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Here is an interesting result from ColChess:

Test #1 : White to play

Current Position
----------------
r . . . . . k b
p . q b p p . .      pP=Pawn
. . . p . n p B      rR=Rook
. p . . . . . .      nN=Knight     lower=Black
. . r . P . P .      bB=Bishop      CAPS=White
. N N . . P . .      qQ=Queen
P P P Q . . . .      kK=King
. . K R . . . R
Thinking  2 29 631 8571 c1b1 d7c6
3 34 1793 23935 c1b1 f6g4  f3g4
4 21 12338 219453 c1b1 a8b8  d2f2 e7e5
5 28 52052 954030 c1b1 a8b8  d2d3 f6h7  h6d2
6 27 346014 6589450 c1b1 b5b4  c3e2 a8b8  e2d4 c7b7
7 29 1020886 17474754 c1b1 b5b4  c3d5 f6d5  d2d5 c7c6  d5d3
8 31 9999194 184613199 h6g5 d7c6  c1b1 a8b8  b3d4 c6e8  d2h2 h8g7
---Answer: Bf8    ~Incorrect-??

The thing that is interesting about it is that ColChess does not use NULL move
pruning.  Hence, the inability to find the right answer cannot be blamed on
Zugzwang positions somewhere in the search tree up to ply 8.



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