Computer Chess Club Archives

Search

Messages

Subject: Re: Is this an engine bug in Chessmaster 8000?

Author: Stefan Fredriksson

Date: 02:57:58 11/25/00

Go up one level in this thread

On November 25, 2000 at 05:53:31, Steve Maughan wrote:

>I came across this position when analysing with CM 8000.
>
>[d] rnb3kr/ppp3bp/3pq3/3N3Q/5R2/8/PPP3PP/R5K1 w - - 0 18
>
>CM 8000’s search behaviour is ‘different’ and could be a bug.  At first
>ChessMaster thinks Nxc7+ is the best move with a score of –1.19.  Then at ply 7
>this increase to +0.65.  Everything is OK so far.  Then at the same ply the PV
>changes to Raf1 with a score of +0.00.  This implies that CM would prefer a move
>of +0.00 over a move of +0.65 (the fact that Raf1 is probably a better move is
>an aside). Now there could be a sensible explanantion e.g. CM could be fibbing
>when it comes to its PV.
>
>Does anyone have an idea what is going on?
>
>Regards,
>
>Steve Maughan

Well, I dont see what is odd here. The King changes its mind about the
evaluation as it goes deeper and sees more.

/Stefan

• Re: Is this an engine bug in Chessmaster 8000? Laurence Chen 06:41:32 11/25/00
  • Re: Is this an engine bug in Chessmaster 8000? Steve Maughan 08:58:47 11/25/00
• Re: Is this an engine bug in Chessmaster 8000? Steve Maughan 05:50:25 11/25/00
  • Re: Is this an engine bug in Chessmaster 8000? John Merlino 10:02:36 11/25/00
    • Re: Is this an engine bug in Chessmaster 8000? Steve Maughan 11:18:30 11/25/00

This page took 0 seconds to execute

Last modified: Thu, 15 Apr 21 08:11:13 -0700

Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.