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Subject: Re: can programs find a forced mate here?

Author: Heiner Marxen

Date: 11:10:47 10/11/00

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On October 11, 2000 at 07:17:19, Uri Blass wrote:

>[D]r2r2k1/pp2nq2/3b3p/2p1p2Q/2P1B3/P2PB3/1P2KP2/R7 w - - 0 1
>
>Can your favourite mate finder find a forced mate here?
>
>I will be surprised if a commercial program can find a forced mate even after 24
>hours and I think that a special mate finder is needed to prove a forced mate.
>
>A team of human(me) and chessmaster6000(ss=10) could find a forced mate after
>some hours.
>
>Chessmaster needed some hours to find the mate in 17 with 29.Bh6(I did not try
>it for a long time in the position before 27.Qxh6 that is posted here)

On a PIII/550 Chest needs already over 16 minutes to find "no mate in 8".
The effective branching factor (for Chest) is around 10, so I do not
expect Chest to solve this.  "No mate in 10" is already a day...

Mate in 17 with so much material left is absolutely out of reach for Chest.
Such is life.

Heiner



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