Problème d'il y a 2 jours

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Bruno's Chess Problem: 04/07/2020

M.Marandjuk, Prapor Peremogi, 1973

Mat en 2(**)
chess problem diagram
Les blancs jouent

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Cacher la solution
1. Qe4!
  1... Kg5 2. Qf5#
  1... Kg3 2. Qxf3#
  
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2020-07-04 15:48:46, by slowbut2
thank you for the glorious reception, problemist
2020-07-04 11:11:16, by problemist
Welcome back, slowbut2!
2020-07-04 10:39:55, by slowbut2
before my seeing others’ comments: My solution [arrived to through the 32-pixel, B&W, restartable-moving-pieces setting]: in view of the following possibility\s::::::::::::: black king forced to move\ queen start and mate\ ,,,,,,,,,,,,,,,,,,,,, it seems [ reverification is intended later on] that white's qefour starts
2020-07-04 10:08:04, by problemist
Shown is a split Rukhlis in a miniature setting showing changed and transferred mates in different phases. The mates in the try 1. Qf6? (2. Qh4#) Bg3, Bg5 2. Qf5#, Qxf3# (but 1.. Bh2!) are transferred to the solution 1. Qe4 (zugzwang) Kg5, Kg3. They are changed on these defenses in another try 1. Rfh2? (2. Rg1#) Kg5, Kg3 2. Qg7#, Qg1# (but 1.. f2!). Reprinted in "Shakhmatny zadachi miniaturi," 1987 and "The Problemist," March 2006, p. 349 (available online) in the article "The Scope of the Miniature: Mate Transference and Friends" by Michael Lipton: "The Rukhlis can also be split across three phases. In addition to standard mate transference – with the same two (or more) mates appearing after the key, but after different defences from those in set play or a try – those defences also elicit new mates, not as in the unsplit Rukhlis also post-key, but in a different, third phase. Marandyuk’s problem is a fine example. The thematic transferred mates, 2.Qf5 and 2.Qf3, follow BB self-blocks after the try 1.Qf6?, and flights after the key 1.Qe4!; and the mates for these same post-key flights are changed from those after another try, 1.Rfh2?, to the post-key play, completing the split Rukhlis (Stocchi II) theme."

Михаил Назарович Марандюк (* 17.1.1949 in Novoselytsia) Ukrainian composer and Grandmaster, see wikipedia de, it, lv, ru, uk. "Mikhail Marandyuk is an exceptionally gifted composer, multiple World Champion in chess composition in direct mate sections (threemovers, moremovers)."

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