[Retros] First example of 'reverse mate' theme

[Pastmaker at aol.com]

Hello friends,

Thanks to Ryan for the correction on the fen for the nnn example, and for his 
kind remarks.  Perhaps some day I will learn how to count.

In our 1979 correspondence Jim Mauldon wrote of athe ep minimal, "I see no 
way of eliminating the promoted man...."  He also sent the following example, in 
which the unit on e3 (denoted "x") can be any Black piece (i.e., not a pawn):
2b1r1nr/5K1k/3q1n1b/4p1pP/5p1p/4x1p1/5p1p/8  Mate in 1.

But it is always an interesting epistemological issue -- how can we conclude 
that the ep minimal cannot be done without promoted force?  

I can't reach that conclusion, although I also couldn't see a way to do it.

Regards,
Tom
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