Chess problem: 6 days ago

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Bruno's Chess Problem: 03/20/2019

M.Degenkolbe, U.Degener, 1st Pr., Schach-Aktiv, 1988

Mate in 2 (***)
chess problem diagram
White to play


Solutions to the chess problem of the day will be made available the following day.

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1. Bb7! ... 2. Qd5#
  1... Nc8, Nxb5 2. Nxc6#
  1... e6 2. Qd6#
  1... g5 2. Rxf5#
  1... fxe4 2. Bxf4#
  1... b3 2. Qe6#
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2019-03-20 08:50:17, by slowbut2
before my seeing comments: My solution [arrived to through the 32-pixel moving-pieces setting and submitted in a style the honorable problemist was imitating on 2018-11-09 08:29:17]: to add potential guard of black king’s west spot to mate with queen [or bishop\rook\west knight] after some black move, white's bbseven starts
2019-03-20 06:56:11, by problemist
Shown is a Cyclic Hannelius of cycle length 4, i.e., the four mates threatened in the tries appear in the solution cyclically shifted against their refutations from the tries. The tries are 1. Re8?, Ne6?, Kxg6?, Nc3? with the threats ABCD 2. Qxd6#, Bxf4#, Rxf5#, Qd5# and the refutations are abcd 1.. fxe4!, g5!, Nxd4!, e6! In the solution, where the key creates an unexpected zugzwang, there are the mates BCDA against the defenses abcd. FIDE Album. Reprinted as No. 119 in Degener's collection of his problems "Matt - 900 Schachaufgaben" (2011).

Udo Degener (* 23.11.1959 in Nordhausen) German composer and Grandmaster, see wikipedia de, it, lv. "Udo Degener is a poet and a publisher but also a remarkable twomover and selfmate composer. He has published many chess problem books, among which "50 Jahre Dombrovkis Thema" (2007) containing 1234 problems achieving the Dombrovskis theme (now out of print). He is also the current holder of the "Albrecht-Sammlung", the twomover database collected by Hermann Albrecht and now including 156000 problems."

Mirko Degenkolbe (* 14.5.1964) German composer and FIDE Master. "Mirko comes from the Arbeiter Schach movement from former East Germany. He edits (edited?) the twomover section of the Problem-Forum. He is however best known nowadays for his longhelpmates. He is interested in such paradoxical features as "Static White Queen in the orthodox helpmate" (article in The Problemist, March 2005)."

Since the opening in October 2000, I had published online more than 6650 free chess problems. If you want more details, look at my chess figures pages.

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