[Retros] Happy New Year

[Elkies, Noam]

It's that time of the year again:

  https://www.janko.at/Retros/d.php?ff=rnb1k1n1/pp1p1pp1/2p1p3/q3r2p/1Q1PP3/2B1b3/PPPNNPPP/2K1RB1R

  SPG-10.0; how many solutions? (C+; NDE 25.xii.2020)

This time Andrew Buchanan took a different approach:
see the last problem of

  https://chessbase.in/news/ChessBase-India-Christmas-New-Year-Solving-Contest-2020

and this year "Leon Xray" posted on Facebook a different kind of
enumerative puzzle, with a nicely symmetrical diagram --

   https://www.janko.at/Retros/d.php?ff=4k3/3ppp2/ppp3pp/8/8/PPP3PP/3PPP2/4K3

-- and a stipulation that makes it appropriate here, albeit barely:

  In how many ways can you add a White Queen and a Black Queen
to this diagram to obtain a legal position?

Wishing all a healthy and happy 2021,
--Noam D. Elkies