Chess problem: 8 days ago

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Bruno's Chess Problem: 05/11/2019

H.Lepuschutz, Schachmagazine, 1948

Mate in 5 (*****)
chess problem diagram
White to play

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Level : * (very easy) to ****** (very hard)

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1. Be8! ... 2. Nc7+ ... 3. Ne6+ Ka6 4. Nc5#
  1... g4 2. Bxh4 ... 3. Rxh7 ... 4. Ra7#
     2... Rf4 3. Rxh7 ... 4. Ra7#
        3... Rf7 4. Rxf7 ... 5. Ra7#
     2... exf1=Q/B 3. Rxh7 ... 4. Ra7#
        3... Ka5 4. Bd8+ Ka6 5. Ra7#
  1... b3 2. c4 ... 3. Bb5#
     2... dxc3 e.p. 3. Rxh7 ... 4. Ra7#
        3... Qxh7 4. Qxe2+ ... 5. Nb4#

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2019-05-11 17:52:42, by problemist
A very hard chess puzzle with a logical touch (though this time not showing the Lepuschütz theme which increases the hardness). The good and well-hidden key moves wBc6 to a safe place on e8, not a4 (not safe) nor d7 (that blocks the 7th rank). The threat is a forced mate in three moves by 2. Nc7+ Kb6, Ka5 3. Ne6+ Ka6 4. Nc5#. Surprisingly there are only two black defenses, the main variation 1.. b3 2. c4 (threat 3. Bb5#) dxc3 e.p. 3. Rxh7 (threat 4. Ra7#) QxR 4. Qxe2+ RxQ, Rc4 5. Nb4#, QxR# and the side variation 1.. g4 2. BxQ and now Black has no defense against the threat 3. Rxh7 4. Ra7#. Quite a challenge for the solver who loses time with dead ends like 1. Bf6? (opening the 8th rank for the wR) b3 or 1. Rf8? (activating the wR) Qh6 2. Rf6 Qf8 until eventually hitting on a key by wBc6 and spotting the threat. Who would have guessed that the wN will mate on the double guarded square b4 (it gets two new guards after dxc3 e.p.) that White conquers in the course of the solution? So for me this time Bruno's five stars were fully adequate.

Hans Lepuschütz (* 5.8.1910 in Graz, † 6.9.1984 in Graz) Austrian composer and International Master, see wikipedia lv. "Hans Lepuschütz was a great specialist of the logical multimover and a member of the Graz chess problem school (Grazer Schule) which linked logical combinations and aesthetic mate positions.
The Lepuschütz theme means chess provocation by White in a multimover, usually with a logical motivation. Hans Peter Rehm presented the Lepuschütz theme on berlinthema.de. Please have a look at these problems, you will not regret it. MontFuji presented in detail (in French, on France-Echecs.com) a doubled Lepuschütz and pendular movements associated with the Lepuschütz theme, as well as pendular movements associated with the doubled Lepuschütz theme and a Holst promotion."

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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