Thursday, November 23, 2017

Part №29. Let's stir a brain crinkle?!

Happy time of the day, dear marathon-racers! According to the settled tradition, today we have to declassify the tasks of the 4th Chess Marathon, to declare the winners and publish the tasks of the 5th Chess Marathon.
But we’ll break this tradition and we’ll postpone «the analysis of flights» till the following release and the celebration of our winners. The matter is that we have decided to change a little the format of the Chess Marathon. Now, except the traditional tasks on a mate in two and three moves, etudes and chess questions, the solvers will meet the task under the conventional name «to recover a composition».
What represents this innovation will be clear a bit later. And more. We plan to publish all 20 tasks of the Chess Marathon at once giving on the decision only 45 days at all.
Agree, it is very convenient for the participants who often happen to be on business trips and have no time to issue the decision for two weeks and send it to the leader of the heading of the marathon.

While 20 competitive tasks will be ready and checked, we offer you a small warm-up before the start - the task «to recover a composition».

«Several weeks ago one Moscow fan of chess olden time sent the problem №1 found in one of the Ukrainian newspapers published in 1929th to the leader of our chess marathon.

№1. NN, 1929
image
#2

Alas, the problem’s decision wasn’t published, and your obedient servant started its solution.
The author's plan was pleasant!!
After the battery «a Queen + a Pawn » replacement by the battery «a Queen + a Horse » a move 1.Qg5! threatens deadly 2.Re2#.

Due to the fact that the White Queen left the seventh line, the Black battery «a Castle + a Pawn» can make three volleys, on which the White respond with three battery mates:
1... de + 2.Qg7#, 1... d6 + 2.Ng7#; 1... d5 + 2.Nd7#! A very nice mechanism!

Unfortunately, except the author's decision there were three possibilities more to put a mate in two moves:
1.Qg7 + K:e6 2.Bf7#; 1.Ra5 + B:a5 2.ed# and 1.Nd6 B:d6 2.Qf6#.

Hasn’t the Moscow historian confused anything in the notation ? The collateral decisions after all lie on the surface and it is difficult to believe that the author "has yawned" these possibilities.

At my request the Muscovite verified the notation with the original from the newspaper once again and didn’t find a spelling error …

But could the newspaper type-setter in a hurry mix the arrangement of figures on the diagramme or worse - missed one or several figures?.»

Dear marathon-racers, try to "recover" without any damage to the maintenance this nice plan.

The term on the problem’s reanimation is 14 days. The winner of this task will be awarded a book prize. The best versions of the corrected problem will be published on the site.


For the beginners of a chess marathon we inform electronic co-ordinates where it is necessary to send the answers to the tasks: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

See you in a week on a chess page of "Perspectiva"!
Your heading leader, Honoured Chess Master of Sports of Ukraine Sergey Tkachenko