Julia Vysotska (Latvia)
Original Problems, Julia’s Fairies – 2013 (III): September- December
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No.373 by Julia Vysotska – Parrying double check to the black King with the one black piece which simultaneously gives mate to the white King. (JV)
PAO(PA): Moves as Rook, but captures only by hopping over a hurdle to any square beyond.
VAO(VA): Moves as Bishop, but captures only by hopping over a hurdle to any square beyond.
Nightrider(N): A Rider along a straight line on squares lying a Knight`s move away from each other.
Take & Make: Having captured, a unit must immediately, as part of its move, play a non-capturing move in imitation of the captured unit from the capture-square. If no such move is available, the capture is illegal. Promotion by capture occurs only when a pawn arrives on the promotion rank as the result of a take&make move. Checks are as in normal chess: after the notional capture of the checked K, the checking unit does not move away from the K’s square.
No.373 Julia Vysotska
hs#3 2 solutions (7+7)
PAO d6; VAO f8
Solutions: (click to show/hide)
I. 1.Ne6-c2 Ne3xc2-a3 2.VAf8xa3-e5 Nd3-f4 3.PAd6-d8 + Nf4xd8-d6 #
II. 1.Ne6-f4 Nd3xf4-g6 + 2.PAd6xg6-h8 Ne3-c4 3.VAf8-d6 + Nc4xd6-f8 #
(C+ by Popeye 4.63 and WinChloe 3.24)
The main theme is parrying double check to the black King with the one black piece which simultaneously gives mate to the white King.
White N opens line for the black Bishop and is sacrificed to the black N to attract it to the the squares where it is sacrificed to the white VAO/PAO.
Reciprocal play of two black Ns:
Reciprocal play of the white VAO/PAO:
Umnov theme on the mating move. Model mates. (Author)
In each solution the first 1.5 moves are used to get the vao/pao to the desired square. In the process one of the black nightriders is sacrificed. This is a very clever way to get a Zilahi! I like how the black nightriders make matching moves on B2. In the first solution 2…Nf4 must be played, because 2…Nb7? would pin the pao! In the second solution 2…Nc4 must be played, because 2…Nf5? would check the white king!
Thank you, Geoff! How could I miss Zilahi in the comment? 🙂 Yes, moves by N don’t require any cook-stoppers here at all by the reasons you’ve shown.
This instantly reminded me of Petko Petkov’s 4th Prize in StrateGems 2011 tourney (judged by me, that is why I remember it). See the award at the SG website.
Very good rendering of the idea nevertheless!
Thanks! But do you think the idea is the same as in Petko’s 4th Prize? I’m showing it here from your award at the SG website:
a) 1.VAb2 LOxb2-d1 2.PAh1 Qd7+ 3.Kxd7-h3+ LOxc8-h2#;
b) 1.PAb5 LOxb5-a6 2.VAa1 Qc7+ 3.Kxc7-c3+LOxc8-b2#
Well, what I see common is that there’s double check which is parried by a black piece (Locust in Petko’s problem), plus a play of PAO and VAO. But the main mechanism is absolutely different! I have reciprocal batteries with PAO/VAO, but Petko has anti-batteries with activity of the white King.
Anyway, thank you for showing so nice Petko’s problem here!
That’s right, I meant the basic idea of parrying double check by very precisely determined Take&Make capture. The other elements are entirely different and undoubtedly the same effect can be shown in many other ways. (Actually, this probably might even be a theme of some future theme tourney: hs# T&M where the double check on the final white move is parried by precisely determined T&M capture.)