Chess problem: 7 days ago

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Bruno's Chess Problem: 03/17/2017

U.Degener, 1st Pr., Litwin-Staszrwski Memorial Tourney, 1988

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

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1. Qa5! ... 2. Nc3#
  1... Bc5 2. Nf6#
  1... Re5 2. Rxe5#
  1... Rxe4 2. Nc7#
  1... cxb5, c5 2. bxa8=Q#
  1... Kxe4 2. Nd6#
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2017-03-17 17:41:06, by problemist
No. 141 in Degener's collection "Matt - 900 Schachaufgaben" (2011). Also the set mate 1.. Kxe4 2. Qh1# ist worth mentioning. It is given up in the main play. Nice is that the try keys and the key are all by the wQ and all consecutive on the diagonal e1-a5.
2017-03-17 11:57:36, by slowbut2
before my seeing comments: My solution: to knight mate\foresee k\r\p\ defenses, white's qdtwo is start before mate with promotion n\r\\ \etc.
2017-03-17 07:36:38, by problemist
Changed mates in 3 phases for the thematic defenses 1.. Kxe4, Rxe4 in the tries 1. Qd2?, Qb4? Rh3!, Re6! and the solution (3x2 Zagoruiko). The key builds a NQ-battery on the 5th line. In the two tries there is also shown a Le Grand (reversal of threat and mate (2. Nc3#, Nf6#) for the same black defense 1.. Kxe4). FIDE Album. Also quite a complex position that is sufficiently hard to untangle.

Udo Degener (*23.11.1959 in Nordhausen) German composer and Grandmaster, see wikipedia de, it, lv. "Udo Degener is a poet 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 and which is available online. He is also the current holder of the "Albrecht-Sammlung", the twomover database collected by Hermann Albrecht and now including 156000 problems."

Since the opening in October 2000, I had published online more than 4931 free chess problems. If you want more details, look at my chess figures pages.

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