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MatPlus.Net  Forum General Longest doubly-forced variant? |
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| | | (1) Posted by Hauke Reddmann [Tuesday, Sep 30, 2014 12:43] | Longest doubly-forced variant?
 (= 6+4 )
You surely all know this 6# by Ropke (http://www.yacpdb.org/?id=103072).
You surely all know the solution :-)
 (= 9+7 )
As you see, senseless violence gains you not that much. :-)
The stipulation ("problem without words") got some popularity in the
SCHWALBE a few years ago. So, what's the longest variant forced for
both sides (of course 3-fold repetition draws immediately :-)?
Unlike a "problem without words" no specific outcome is mandatory.
Hauke
| | | (2) Posted by Joost de Heer [Tuesday, Sep 30, 2014 14:53]; edited by Joost de Heer [14-09-30] |
An automated #10 by Noam Elkies:
http://timkr.home.xs4all.nl/admag/bestek.htm
Black does have choices, but all lead to the same final position.
| | | (3) Posted by Hauke Reddmann [Wednesday, Oct 1, 2014 10:58] |
I should have known it's somewhere on Tim's page :-)
...but still, I'd like to have a variant where all
moves are completely forced, not only the outcome.
Hauke
P.S. Managed to get a half move farther than in my
quick-and-dirty example (try yourself :-). Getting
a split headache to sneak in another.
| | | (4) Posted by Hauke Reddmann [Tuesday, Oct 7, 2014 12:22] |
Aaaand the current record since 1976 is:
http://karlscherer.com/Chess/prchess1.html
Why does nothing of this surprise me? :-)
(The fact that it's not by a "profi", that it's
published since nearly 40 years, but not in
a chess journal and thus virtually unknown...)
Folks, an updated volume-double edition of
"Schach und Zahl" is overdue!
Hauke
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