Problème d'il y a 7 jours

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Bruno's Chess Problem: 01/12/2019

S.Sovik, 1st Pr., Bayer Memorial, 1987

Mat en 6 (*****)
chess problem diagram

Les blancs jouent

Astuce :

Vous pouvez changer l'aspect de l'échiquier (menu Anciens/Préférences)

1. Qc1! ... 2. c4+ Ka6 3. Na8 ... 4. Rb6#
        3... Nxc4 4. Qxc4+ Bxc4 5. Rb6#
  1... Qg3, Qh2 2. c4+ Ka6 3. Na8 ... 4. Rb6#
        3... Qxd6+ 4. Rxd6 ... 5. Rb6#
           4... Nxc4 5. Qxc4+ Bxc4 6. Rb6#
  1... Nc7 2. c4+ Ka6 3. Na8 ... 4. Nxc7#
        3... Nxa8 4. Kxa8 ... 5. Rb6#
           4... Nxc4 5. Qxc4+ Bxc4 6. Rb6#
  1... Rxc3 2. Nd5+ Kc4 3. Ne3+ Rexe3 4. Nb6+ Kxc5 5. Nxa4+ Kc4 6. Nxb2#
           4... Kb5 5. Nd5+ Ka6 6. Rb6#
              5... Kc4 6. Nxe3#
  1... Bxc3, Be5 2. Nxd7+ Kc4 3. Ne5+ Rxe5 4. Nb6+ Kxc5 5. Nxa4+ Kc4 6. Nxb2#
           4... Kb5 5. Nd7+ Ka6 6. Rb6#
              5... Kc4 6. Nxe5#

2019-12-01 16:56:40, by problemist: The Bayer-Memorial was probably in honor of the Austrian-Czech composer Conrad Bayer (* 10.11.1828 in Olmütz, † 21.9.1897 in Vienna), see wikipedia cs, de, it, lv, ru, uk. The Czech entry is particularly comprehensive. Bayer was indeed a follower and theoretician of the Old-German School of chess composition, so Sovik's prize winning problem would have appealed to him.
2019-12-01 16:36:27, by problemist: The Advent is beginning and Bruno promptly challenges his solvers and keeps them busy with a hard problem in the logical style but also resembling the Old-German style :-) in the extensive by-play. The key activates the wQ guarding c3 and threatening 2. c4+. There are two main echo variations of full length, by Black capturing on c3, and some bushy side variations. On 1.. Bxc3 2. Nd7+ Kc4 3. Ne5+ (using the pin of the bB) Rxe5 4. Nb6+ Kb5 5.Nd7+ Kc4 6. Nxe5# (using again the pin); 4.. Kxc5 5.Nxa4+ Kc4 6. Nxb2# (using the pin a third time) and analogously 1.. Rxc3 2. Nd5+ Kc4 3. Ne3+ Rexe3 4. Nb6+ Kb5 5. Nd5+ Kc4 6. Nxe3# (using the pin of bRc3 twice); 4.. Kxc5 5. Nxa4+ Kc4 6. Nxb2#. On 1.. Nxc5 2. Na8+ (Nd5+) NxR 3. Nc7+ Kc4 4. Nb6+ Kxc5 5. Nxa4+ Kc4 6. Nxb2# or even shorter 2. c4+ Nxc4 (Ka6 3. Na8) 3. Qxc4+ Bxc4 4. Na8+ Nxb7 5. Nc7#; 1.. Rf8 2. c4+ Ka6 (Bxc4 3. Nd5#; Nxc4 3. Qxc4+ Bxc4 4. Nd5#) 3. Nxd7 (4. Rb6#) Rxc8+ 4. Kxc8 5. Nb8#; 1.. Qh2 (Qg3) 2. c4+ Ka6 3. Nxd7 Qxd6+ 4. Rxd6 Nxc4 5. Qxc4+ (Rxc6+) Bxc4 6. Rb6# and similar variations without new features (let's wait for Bruno presenting us the full tree of all variations :-)).

Štefan Sovík (* 29.12.1944 in Mosonmagyaróvár) Slovak composer and International Master. "Štefan Sovík composes mostly direct and selfmates in 2-3 moves and enjoys cyclic themes. He has become an International Judge in 2017."

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