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Subject: Twin miniatures [by Werner Speckmann,1955] Mate in 17

Author: Heiner Marxen

Date: 11:12:34 02/07/01

Finally, after nearly 11 days Chest completed the mate in 17 miniature,
as posted by José Antônio Fabiano Mendes on January 26, 2001 at 06:55:42.
(K7/600, 350MB hash)
[D]8/p7/8/2p5/p3Q3/K7/2r5/1k6 w - -

Chest finds two solutions:  Qe1+ and Qh1+.
The second key move spans a much smaller tree than the first: 60 lines
versus over 2 million lines (ouch).  I have not yet analysed why it grew
sooo huge.  Here are the PVs:

 1.Qe1+ Rc1 Qe5  Rc2 Qe4  a6  Qh1+ Rc1 Qh7+ Rc2
 6.Qe4  a5  Qh1+ Rc1 Qh7+ Rc2 Qe4  c4  Qh1+ Rc1
11.Qh7+ Rc2 Qe4  c3  Qh1+ Rc1 Qh7+ Ka1 Qf7  Rc2
16.Qf1+ Rc1 Qxc1#

 1.Qh1+ Rc1 Qh7+ Rc2 Qe4 ...same as above

Heiner

• Re: Twin miniatures - Cook found Olaf Jenkner 14:42:43 02/07/01
  • Re: Twin miniatures - Cook found Heiner Marxen 03:39:28 02/08/01
    • Re: Twin miniatures - Cook found José Antônio Fabiano Mendes 05:01:01 02/08/01
      • Re: Twin miniatures - Cook found Heiner Marxen 05:23:14 02/08/01
• Re: Twin miniatures [by Werner Speckmann,1955] Mate in 17 Uri Blass 11:55:22 02/07/01
  • Re: Twin miniatures [by Werner Speckmann,1955] Mate in 17 Ed Schröder 23:20:20 02/07/01
    • Re: Twin miniatures [by Werner Speckmann,1955] Mate in 17 Uri Blass 00:36:00 02/08/01

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