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Subject: Bug in Nimzo 7.32 engine?

Author: Steve Maughan

Date: 21:45:45 09/23/99

I gave Nimzo 7.32 the following test position

r2b1qrk/ppp3pp/3p1p2/4pPPQ/4P2P/3PB3/PPP5/1K4RR w - - 0 1

It's mate in 4 via 1.Qxh7+ Kxh7 2.g6+ Kh8 3.Rg5 fxg5 4.hxg5 mate.  The position
is simple for todays programs to solve.

However giving Nimzo the white pieces it immediately announces mate in 2!!  Now
I can accept that it is reasonable to announce mate in more than 4, but not
less.  Also after playing 2.g6 it announces mate in 1, and then after Rg5 and
hxg5 it claims mate in 0.

I assume that this is a minor bug in the engine.  It really should be sorted out
as it means that Nimzo cannot be trusted to give shortest mates.

Regards

Steve Maughan

• Re: Bug in Nimzo 7.32 engine? Alexander Kure 15:07:22 09/24/99
  • Re: Bug in Nimzo 7.32 engine? James T. Walker 19:34:26 09/24/99
    • Re: Bug in Nimzo 7.32 engine? Alexander Kure 03:40:58 09/25/99
      • Re: Bug in Nimzo 7.32 engine? James T. Walker 15:39:33 09/25/99
      • Re: Bug in Nimzo 7.32 engine? leonid 15:12:34 09/25/99
• Re: Bug in Nimzo 7.32 engine? James T. Walker 06:30:31 09/24/99
  • Re: Bug in Nimzo 7.32 engine? Shep 07:01:39 09/24/99
  • Re: Bug in Nimzo 7.32 engine? Steve Maughan 06:46:10 09/24/99
• Re: Bug in Nimzo 7.32 engine? Dann Corbit 22:31:19 09/23/99

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