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Subject: Re: Mate in 7 moves - diagram

Author: James T. Walker

Date: 14:53:59 09/27/00

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On September 27, 2000 at 05:24:39, Uri Blass wrote:

>On September 27, 2000 at 05:17:52, Ed Schröder wrote:
>>On September 27, 2000 at 05:13:57, Ed Schröder wrote:
>>>On September 27, 2000 at 04:45:38, Eduard Nemeth wrote:
>>>>[D]8/8/p3R3/1p5p/1P5p/6rp/5K1p/7k w - - 0 1
>>>>Shredder 4 and Fritz 6a this don't find !
>>>I guess every Rebel version will solve this one very quick.
>>>00:01  10.00  Mate in  7 moves 2.Re1+ Rg1 3.Rf1 a5 4.bxa5 b4 5.a6 b3 6.a7 Rxf1+
>>>7.Kxf1 b2 8.a8=Q+
>>>This comes from Century 2.0
>>And here is Tiger II beta:
>>00:00:00.7	 Mate in 6	12	122224	Re1+  Rg1  Rf1  a5  bxa5  b4  a6  Rxf1+  Kxf1
>>b3  a7  b2  a8Q#
>The score is mate in 6 and the pv shows mate in 7.
>Is there a bug in writing the score correctly?

It's a very common problem with chess programs.  Some count the first move in
their mate announcements and some apparently feel they are making the move first
and then announcing mate in "x".  I think either is OK but I wish there was a
standard that evrybody followed.

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