[Retros] Challenge

[Noam Elkies]

I wrote:

< This may be minimal in material, but for piece count one can do better:
< Kf6,Qh3(or h7) / Kf8,Qd7.

Likewise with R vs. R (or Q), e.g. Kg6,Rf7/Kh8,Q(R)c7, or even R vs. B,
Kg6,Re7/Kh8,Be2.  Not sure if R/N or R/P is possible.

NDE