Problème d'il y a 6 jours

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Bruno's Chess Problem: 26/09/2025

V.Rudenko, 1er Pr, Gazeta Czenstochova, 1977

Mat en 4(***)
chess problem diagram

Les blancs jouent

Astuce :

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1. Bg6! ... 2. Qf4+ Kd3 3. Nd6+ ... 4. Qd2#
        3. ... Kc3 4. Qe3#
  1. ... Ra4 2. Nh6+ Ke3 3. Qxb6+ ... 4. Ng4#
     2. ... Kd4 3. Qxb6+ ... 4. Rc2#
        3. ... Ke5 4. Nf7#
  1. ... Ne2, Nh3 2. Re2+ Kf3 3. Bh5+ Rg4 4. Nd4#

2025-09-26 12:15:55, by problemist: "The bombing of civilian centers was initiated by the Germans and adopted by the Japanese. To it, the Allies responded in kind—as it turned out, with greater effectiveness—and they were morally justified in doing so."
Albert Einstein (1879-1955) From “Einstein on the Atomic Bomb,” part 2, an interview recorded by Raymond Swing, Atlantic Monthly, November 1947.

The key is 1. Bg6 (2. Qf4+ Kd3 3. Nd6+ Kc3, Re4 4. Qe3# , Qd2# or 3. Nd4+ dual). The main variation is 1.. Ra4 2. Nh6+! Ke3 3. Qxb6+ Rd4, d4 4 Ng4# and 2.. Kd4 3. Qxb6+ Kc4 (Kc3) , Ke5 4. Rc2#, Nf7#; further 1.. Ne2 (Nh3) 2. Re2+ Kf3 3. Bh5+ Rg4 4. Nd4#; 1.. Nf6 (Nh6) 2. Qf4+ or Qxe7+ dual. In "Преследование темы" No. 485 from 1979, a version is presented with Ng1->c1 in order to fix the duals, as only 3. Nd4+ in the threat and 1.. Nf6(Nh6) 2. Qxe7+ are working now. However there is the cook 1. Qf4+!? Kd3 2. Qxc1 Rb2 3. Rf3+ Ke2, Ke4 4. Nd4#, Qe3#. As a cook stoper in yacpdb the ugly +bRa1, +bPa2 are added. So there are still issues with this problem.

Валентин Федорович Руденко (* 19.2.1938 in Yenakiieve, † 2.4.2016) Ukrainian composer and Super-Grandmaster, see wikipedia de, fr, it, lv, ru, uk. "The late Valentin Fedorovich Rudenko was a world-famous composer (no. 4 in the FIDE-Album top of composers with 229 points) considered by some as the best orthodox problem composer. He was also the author of one of the best chess problem composition books ever written "Преследование темы.— Москва, 1983". He proposed the date of January 4th as International Day of Chess Composition. His problems reached space levels when his threemover of Suomen Shakki 1957, 1st prize, was aboard the mission SOYUZ 9 (it is now on display in a museum in Cheboksary)." By profession he was a leading engineer in the Soviet (and later Russian) space program. A recent selection of 9 of his problems with ample commentary appeared in "Phénix" 352-353, Mars-Avril 2024, pp. 13682-13685, in "32 Compositeurs ukrainiens et 32 années d'indépendance pour un univers de 64 cases."

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