[Retros] First example of "reverse mate" theme

[Mario Richter]

Hello,

Tom Volet wrote:


> ...  it is possible to construct a minimal that also

> has the property that the minimalist side's only legal move is 1.

Pxp.e.p.,

> mate (the move being justified retroanalytically in the sense that Black

> demonstrably must have made the two-square advance on its last move).

> (One might call this a "mate only e.p. minimal".)

> ...

> So, the challenge, I suppose (and I have not tried in the last 25 years),

is

> to compose a mate only e.p. minimal with no promoted force.  Personally I

will

> refrain, confident that others will succeed.

>


So here is my attempt:

 Mario Richter
 Retros Mailing List
 October 2004

    a   b   c   d   e   f   g   h
  +---+---+---+---+---+---+---+---+
8 |   | . |   | . |   | . |   |*r | 8
  +---+---+---+---+---+---+---+---+    Mate in 1
7 | . |   | . |*q |*n | K | . |*k | 7
  +---+---+---+---+---+---+---+---+
6 |   | . |*b | . |*p |*p |   |*b | 6
  +---+---+---+---+---+---+---+---+
5 | . |   |*n |*r | . |   |*p | P | 5
  +---+---+---+---+---+---+---+---+
4 |   | . |   |*p |*p | . |   |*p | 4
  +---+---+---+---+---+---+---+---+
3 | . |   | . |   | . |*p | . |   | 3
  +---+---+---+---+---+---+---+---+
2 |   | . |   | . |   | . |*p | . | 2
  +---+---+---+---+---+---+---+---+
1 | . |   | . |   | . |   | . |   | 1  (2+16)
  +---+---+---+---+---+---+---+---+
    a   b   c   d   e   f   g   h

Mate in 1

fen = 7r/3qnK1k/2b1pp1b/2nr2pP/3pp2p/5p2/6p1


May be somebody would like to check it?

Thanks,
  mario