[Retros] Fwd: Proof game promotion task

[Noam Elkies]

"Timothy Y. Chow" <tchow at alum.mit.edu> asks:


> [...] What is the most number of knights (or queens, or whatever)

> to appear in the set position of a proof game [with a unique solution]?


I suppose one could also ask to maximize pieces of the same kind and
a single color; e.g. shas anybody constructed a sound proof game ending
with 10 white Bishops on the board?

NDE