Problème d'il y a 10 jours

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Bruno's Chess Problem: 11/02/2018

K.Mlynka, Sachove umenie, 1975

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

Astuce :

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1. e4! ... 2. Rf5#
  1... c5 2. Rd5#
  1... g3 2. Nexf3#
  1... Nxe4 2. Nxd3#
  1... Ne3 2. Bb2#
  
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2018-02-11 13:44:34, by problemist
Here is the full explanation of the specific version of the Mlynka theme shown in this problem.
The defense motives in the four phases are cyclically shifted according to the scheme AB-BC-CD-DA with the meaning:

A - guard of mating square
B - capture mating unit
C - open line for defense
D - capture guard

1. exd3 (threat 2. d4#) c5 (A), Nxd3 (B) 2. Rd5#, Nxd3#
1. exf3 (threat 2. f4#) gxf3 (B), Ne4 (C) 2. Nexf3#, Nxd3#
1. e3 (threat 2. Re7#) c5 (C), Nxe3 (D) 2. Rd5#, Bb2#
1. e4 (threat 2. Rf5#) Nxe4 (D), Ne3 (A) 2. Nxd3#, Bb2#
2018-02-11 10:43:57, by slowbut2
before my seeing comments: My solution: to rook [knight, bishop,second rook] mate , white's efour is start before mate
2018-02-11 07:48:53, by problemist
Shown is an Albino (all four possible moves of wPe2) in three tries and the solution: 1. exf3?, exd3?, e3? Qh2!, a1Q!, Ra7! The 4th possibility solves. In addition, according to the composer, "OM-42-54 spiralova zamena." So this is again a version of the Mlynka theme. Here's the general definition according to Juraj Lörinc:

OM-xy-zw, where
x stands for number of phases,
y stands for number of defences in each of them,
z stands for total number of different defences,
w stands for total number of different defence motives.

This way classical Mlynka theme in which 3 defences in two phases cyclically change their motives gets the symbol OM-23-33.

Karol Mlynka (*11.8.1944 in Kozárovce) Slovak composer and FIDE Master. "Karol Mlynka is a twomover and fairy composer. Juraj Lörinc summed it up on his website: Teacher of Slovak and German languages. Known Slovak composer, he composes since 1961, inventor of Mlynka theme (cyclic change of defence motives of 3 defences in 2 phases) as well as many other original themes from the field of so called Slovak school. International judge FIDE since 1987 and FIDE master since 1990. In recent time he works well in Pat a Mat redaction, where he is editor for #3. - Karol Mlynka also invented the Supertransmuting King and has already composed many problems with this fairy piece. The definitions and some examples can be found also on Juraj Lörinc's website. Karol Mlynka's book "100 selected chess compositions" can be downloaded from selivanov.ru." [Today's problem is listed as No. 107 in the book "409 Selected Chess Compositions of Karol Mlynka" by Gabriel Török (available online).]

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