# No.620 (PH)

 No.620 Peter Harris(South Africa) Original Problems, Julia’s Fairies – 2014 (III): September – December →Previous ; →Next ; →List 2014(III) Please send your original fairy problems to: julia@juliasfairies.com

No.620 by Peter Harris – The only neutral Royal piece is on the board! How it can be mated? (JV)

Definitions:

Sentinels Pion neutre: When a piece (Pawn excluded) leaves a square outside the first and last rows, a white piece leaves a wP, a black piece leaves a bP and a neutral piece leaves a nP unless 8 Pawns of that color are already on the board.

Royal piece: Piece that executes a function of the King on the board.

 No.620 Peter HarrisSouth Africaoriginal – 11.10.2014 Hint by author: (click to show/hide) neutral royal sa8 ser-#8                                (0+0+1n)Sentinels Pion NeutreRoyal piece Sa8 During the sequence a neutral piece cannot observe the Royal S – it would be self-check. Because of this the solution involves two under-promotions – and it also affects the order of moves. Solution: (click to show/hide) 1.nrSa8-c7 2.nrSc7-e6[+nPc7] 3.nPc7-c8=nR 4.nRc8-c7 5.nrSe6-f8[+nPe6] { } 6.nRc7-e7[+nPc7] 7.nPc7-c8=nB 8.nRe7-g7[+nPe7] # { (C+ by Popeye 4.69)} Looking at the diagram it is truly fascinating that the S will be mated! I have never made a problem like this before. (Author)

### 3 Responses to No.620 (PH)

1. S. K. Balasubramanian says:

Peter Haris has always innovative ideas for his problems. This one is exceptionally good to conceive the imagination that a single piece on the board can be mated. As usual even with single piece his problem is not so easy to solve. Hats off to Peter!

2. Peter Harris says:

In case it escapes notice I should have remarked that without a P on e6 there is no mate.

• S. K. Balasubramanian says:

Yes, that is a hidden beauty of your problem.
In fact I tried to find if there is any cook and I could see that without Pe6 the Pe7 can defend by Pe7-e6.