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MatPlus.Net Forum Selfmates After Two Years: 7 Black Rook Promotions
 
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(1) Posted by James Malcom [Monday, May 30, 2022 06:54]

After Two Years: 7 Black Rook Promotions


Those who frequent SuperProblem may be famaliar with this diagram, published in the annual informal tourney.

Infinite, uncountable gratitude goes to Olaf Jenker for running Gustav, for quite some hours, to label it C+.

F310, James Malcom, SuperProblem, 28-05-2022, s#15
(= 9+14 )


This record is two years in the making, as evidenced by this page: http://superproblem.ru/archive/Labor/Malcom-S.html

I required growth in my abilities to succeed. With many, many, many failed matrix I at last struck gold this month. This is perhaps my longest endeavor, as of yet, accomplished. Many more still reside in my document bin.

Will 8 ever come? Perhaps we shall tell in two more years time. I have a few schema, so onward I go in the fight against illegality.
 
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(2) Posted by Olaf Jenkner [Monday, May 30, 2022 20:59]

This problem also may be considered as a mathematical problem.
It shows the faculty 5! = 1*2*3*4*5 = 120.
There are exactly 120 lines in the output file, if only full length variations are showed.
 
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MatPlus.Net Forum Selfmates After Two Years: 7 Black Rook Promotions