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Problem 833: Aleksey Oganesjan, Vitaly Medintsev, Anatoly Skripnik - Helpmate
aleksey.oganesjanvitaly.medintsevanatoly skripnik(16.05.2017) Welcome to Anatoly Skripnik who joins the other two Russian experts to show a complex blend of promotions, selfpins and unpins! They needed the full black army to control the small white force!
833: Aleksey Oganesjan, Vitaly Medintsev &
Anatoly Skripnik (Russia)
H#2         3 sol.      (4+16)
1.c1R Qxb4 (Qxd5, Qxa4?) 2.Rc3 Qe7#

1.c1B Qxd5 (Qxa4, Qxb4?) 2.Bg5 Qd5-d7#

1.c1S Qxa4 (Qxb4, Qxd5?) 2.Sa2 Qa4-d7#



+2 #1 Frank Richter 2017-05-24 09:08
Very complex idea.
Would be nice to have 1.c1R Q:Rb4 to achieve the Phoenix effect three times. Is it possible?
0 #2 Frank Richter 2017-05-30 09:59
On the other hand - given position is sound with a Rb4 too, but the rook does nothing there...
+2 #3 Vitaly Medintsev 2017-06-04 15:47
I suppose, it is impossible.
We spent over 3 months to get a sound problem having no serious defects
0 #4 Frank Richter 2017-06-06 16:55
Yes, I believe without any doubts.

You may simply replace in given position bPb4 by a black rook and the problem remains correctly. But the rook does nothing, so this isn't a serious option, of course. The captured black pieces should have some kind of function, f.ex. guarding mating fields. I tried some variations by myself, but without any success, it seems really a hard challenge.

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