No.609 (PH) – Julia's Fairies

No.609
Peter Harris
(South Africa)

Original Problems, Julia’s Fairies – 2014 (III): September – December

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No.609 by Peter Harris – Four(!) fairy-conditions create a surprising final. The problem has author’s Introduction! (JV)

Definitions:

Patrol Chess: A piece can capture or give check only if it is observed by a piece of its own side.

Maximummer: Black must play the geometrically longest move or may choose from among longest moves of equal length, distances being measured from the center of each square. Diagonal and oblique distances are measured from the orthogonal coordinates by using Pythagora’s theorem (take the square root of the sum of the squares of the orthogonal distances). All other orthodox chess rules apply.
White Maximummer: Only White must play the geometrically longest moves, Black plays orthodoxal.

Sentinels Pion Advers: When a piece (not a Pawn) moves, a Pawn of the colour of the opposite side appears on the vacated square if it is not on the first or the last rank, and if there are less than 8 Pawns of that colour on the board.

Anti-Super-Circe: After a capture, the side making the capture can place the capturing unit on any empty square. [Placement is compulsory]. A Pawn placed on its first rank is immovable.

No.609 Peter Harris
South Africa
original – 27.09.2014

INTRODUCTION (by author).

white ka1 rh1 bc2 black kc3 pa2

ser-s#10 (3+2)
Patrol Chess
White Maximummer
Sentinels Pion Advers
Anti-Super-Circe

Setting the scene.
Before considering moves a solver should make the following analysis:
The 4 conditions can be viewed as 2 helpful and 2 impediments.
The 2 helpful are Antisupercirce and Sentinelles pionadvers.
Antisupercirce enables White after a capture to place a piece anywhere.
Sentinelles pionadvers produces bPs as food for Antisupercirce.
Whitemaximummer and Patrouille are impediments.
White has to cope with them when planning to use Antisupercirce.
Not only must a capturing move be the longest available to White but the capturing piece has to be empowered.
This requires White to plan ahead as regards where to place a piece after a capture.
A chain/sequence of White moves will ensue.
Additionally bearing in mind the stipulation, a solver will think of what the final positions of the B and R could be.
This will give him something to aim at. [It seems that Black?s mating move will be Kb2].
In this regard he will notice that the R and B cannot mutually empower each other. If the R empowers the B the B cannot empower the R and vice-versa.

Solution: (click to show/hide)