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| (1) Posted by Hauke Reddmann [Sunday, Feb 17, 2008 18:20] |
Guess-the-theme
OK, OK, it's not really a theme, more an invitation
to explore it more, hint: I 100% optimized the
economy, so as a problem it's lousy.
 (= 4+3 )
So, can you guess what I wanted to show?
Mate in 2
Hauke
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| (2) Posted by Arpad Rusz [Sunday, Feb 17, 2008 21:51] |
Maybe, it's the Reddmann-Theme. Or you didn't get the patent for it yet?
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| (3) Posted by Uri Avner [Monday, Feb 18, 2008 02:30] |
I give up. You've made sure to leave no trace...
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| (4) Posted by Guy Sobrecases [Monday, Feb 18, 2008 09:50] |
b) Remove the first W sacrificed unit of a), and mate in 3, 2 solutions.
c) Queen can castle
d) BP can capture the wK e.p. from the 3rd rank
e) =d) After the key
f) =c) Rotate 180° Celsius
g) =b)+WRh1, #2
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| (5) Posted by Sarah Hornecker [Monday, Feb 18, 2008 10:30] |
Ah, so that's a Valladao. He should have said! Nobody (except you) would have found it! On, now where's the promotion?
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| (6) Posted by Hauke Reddmann [Monday, Feb 18, 2008 13:43] |
Admit it, you haven't even *tried* :-)
The solution is SxP KxR QxL. As you see, all figures involved
in a single line and no unthematic material!
Of course, that was just a "proof of concept". It would be much
more spectacular to have an additional try ?xP Kx? ?x?
(or ?xP ?x? Kx?) with some gratituous cyclic shifting
or suchlike going on.
Hauke
P.S. Reddmann-Theme? Patent?? Say, are all problem composers except
me so vain? :-)
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| (7) Posted by Arpad Rusz [Monday, Feb 18, 2008 15:58] |
Hauke, my reply was only a little joke. See:
http://www.matplus.net/pub/start.php?px=1203346477&app=forum&act=posts&fid=gen&tid=305&pid=2018#n2018
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| (8) Posted by Vladimir Tyapkin [Monday, Feb 18, 2008 19:17]; edited by Vladimir Tyapkin [08-02-18] |
A somewhat similar theme of cyclic captures was suggested by L.Loshinsky and A.Dombrovskis in the early 70s. The literal translation of its name is 'mutual responsibility' or 'cover-up'. They published several problems, here is one:
L.Loshinsky, A.Dombrovskis
Magyar Sakkelet, 1971
1st prize
 (= 8+9 )
#2
1.Qf5! ~ 2 Qf4# 1...gf5 2 Sf5# 1...Sd6 2Rd6# 1..Qc6 2Sc6# 1...Qe5 2. Be5# 1... gf4 2 Qf4#
Black-white cycle of captures: PxQ-SxP-SxS-RxS-QxR-SxQ-QxS-BxQ-PxB-QxP
They use defensive and mating moves to make up the pattern.
Interestingly, Dombrovskis saw 'odd' themes like this one as a crisis of the twomover in 70s. More details available in his book at http://problem64.beda.cz/silo/grin_1985.djvu, p.109-110(in Russian)
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| (9) Posted by Hauke Reddmann [Tuesday, Feb 19, 2008 12:34] |
@Rusz: I know, I know :-) (I read that post.)
@Tyapkin: THX for your *very* interesting comment.
Hauke
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| (10) Posted by seetharaman kalyan [Thursday, Jun 17, 2010 21:03] |
N.Shankarram showed an 8-fold cycle of capture and mate in his 'I-pr.The Problemist, 1983'. It is a reflexmate, but still a task. (No.P 1010909 in the PDB server).
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