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Subject: Re: Mate in 11

Author: Mike S.

Date: 13:11:53 03/27/02

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On March 27, 2002 at 14:06:44, Art Basham wrote:

>White plays 1. Qh3 in this composed problem, and mates in about 11...!
>[D]5b2/r2pp2K/2pp2p1/B2k2NP/2nP2Q1/2P5/P1Pp4/3N3b w - -
>1. Qh3 is the correct first move here!

For long mates, I usually try Chess Tiger or The King.

Chess Tinger 14.0 chooses Qh3 very fast after 0:01, but doesn't announce mate
until ply 13 / 6 minutes (I don't know which base depth is required in Tiger to
reach the necessary 21 plies here, so I stopped the test).

P3/700 MHz, 96 MB hash

Analysis by Chess Tiger 14.0:

1.hxg6 c5 2.Df5+ Kc6 3.Ld8 cxd4 4.cxd4 Ld5 5.Dxf8 Txa2 6.Dxe7 Txc2
  +-  (8.00)   Tiefe: 7   00:00:00  95kN
  +-  (8.22)   Tiefe: 8   00:00:00  163kN
1.Dg1
  +-  (8.90)   Tiefe: 8   00:00:01  231kN
1.Dh3 Le4 2.Sxe4 c5 3.Sxd2 Kc6 4.Sxc4 d5 5.Df3 cxd4 6.hxg6 d6
  +-  (11.78)   Tiefe: 8   00:00:01  375kN
  +-  (15.84)   Tiefe: 13   00:06:48  101472kN

Regards,
M.Scheidl



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