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Subject: little study too difficult for some programs?

Author: Gerhard Vetter

Date: 14:54:35 03/08/00


Lately I found this easy-to-solve but elegant little study:


[D]8/8/8/8/4k3/1P1p4/1r6/R1N1K3 w Q -

To my surprise many modern programs can't find the win despite of 5manTBS only
2ply away!

Junior 6 (with 5manTBS) sees only a draw after 45 min on Celeron 500/ 128
Also Shredder 4 and Nimzo 7.32 fail to solve it.

It is interesting that the older versions of some of the above programs need
only 0 sec
(Nimzo99) resp. 10 sec (Junior 5.0). Tiger 12.0e takes also 0 sec.

It would be interesting to know how other programs do in this position and even
more
interesting if someone can suggest a reason for this odd behaviour of some
leading programs.

Since I don't know if this information is embedded in the EPD: white has still
castling rights.

Gerhard




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