Chess problem: 5 days ago

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Bruno's Chess Problem: 04/14/2021

L.Salai, Nedelna Pravda, 1983

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


Archives of checkmates over the last 10 days can be consulted.

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1. Nb3! ... 2. Nd4#
  1... Nb8, Nc7, Nc5, Nb4 2. Nc5#
  1... g5 2. Bxf5#
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2021-04-14 18:17:47, by problemist
Anti-Somov A is better known as Theme A: "Known also as Barulin defence. A square in the black King's field is guarded by two white linemovers. A threat closes one of these lines and Black defends by closing another." (Encyclopedia of Chess Problems) This theme is shown in the two tries and here the black defenses are successful. Usually they happen in the solution and defend the threat, but have side effects that allow White to mate in another way.
2021-04-14 10:40:05, by slowbut2
before my seeing others’ comments: My solution [arrived to through the 32-pixel, B&W, restartable-moving-pieces setting and “(?)”]: in view of the following possibility\s:::::: black can start with three\ white knight starts\ ,,,,,,,,,,,,,,,,,,,,, it seems [ reverification is intended later on and before seeing others’ comments] that white's nbthree starts
2021-04-14 07:05:14, by problemist
This is part of a twin problem, published in Pravda, 30 Sep 1983 (1478) with two more versions. The key should activate the wN, but 1. Ne2?, Nd3? (both with the threat 2. Nf4#) Nc5!, Nd4! [Anti-Somov A] so 1. Nb3 zugzwang, 1.. Nc~, Na~, g5 2. Nd4#, Nc5#, Bxf5#.

Ladislav Salai Sr. (* 19.8.1934 in Lučenec, † 25.3.2006) Slovak composer. "He was an orthodox and fairy composer. He invented the fairy condition SAT which is described in details by Juraj Lörinc on his website and he was the editor of the magazine 'Umenie 64'." (From
"More than half of his output of around 700 compositions consisted of 2-movers, and he won some 130 tourney honours. He was very active as an editor (of 'Mat-Pat' 1983-96 and 'Umenie 64', 1996-2006), as a tourney judge and as a writer of numerous articles. He was the inventor of the fairy form SAT, of which he composed around 100 examples." (From his obituary in "The Problemist," May 2006)
His son Ladislav Salai Jr. (* 18.1.1961 in Zvolen) is Grandmaster in both composition and solving and a "renowned composer of cyclic problems."

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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