This site now hosts a complete archive of PDF versions of The Problemist Supplement, from 1992 to the current year. This magazine is aimed mainly at newcomers to chess composition, so it is recommended for those who want to find out more about chess problems. You can find the archive here.
This week's problem is a case of “no pain, no gain”. It is a tough one to
solve, but any time spent on the task will be amply rewarded by seeing this masterpiece
by Vukcevich unfold. Those who require a clue, here it comes: the intended white mating
move is Qd8 mate – your mission, should you decide to accept it, is to work out
how to enforce the clearance of the many obstacles on the d-file!
The intended White mating move is Qd8 mate, for which purpose the d-file must be
cleared by a series of checks. However, the order in which the checks are played is
crucial. Thus, the immediate 1.Bxe3+? dxe3 2.Re5+ Nxe5 3.Ne4+ fails, because Black
has 3...Rxe4. That difficulty can be overcome by playing 1.Ne4+? first, but now
after 1...dxe4 2.Bxe3+ dxe3 3.Re5+, the opening of the 5th rank means that Black
has 3...Qxe5. Similarly, starting with the rook check fails, because after 1.Re5+?
Nxe5 2.Ne4+ dxe4 3.Bxe3+, the 3rd rank has been opened, and so Black has 4...Rxc3.
The key is the stunning 1.Kh2! threatening 2.Qg1 mate. Black can defeat this
by playing one of his major pieces to the first rank, but then he removes a guard from
either the 3rd, 4th or 5th ranks, thus allowing one of the above tries to work.