[Retros] Add pieces update

[Alain BROBECKER]

Dear retro fans,



Another small update of the "add pieces" record.

Problems N1CRb and N1CNb will probably disappear

in a future version.
 Find it here:
  http://abrobecker.free.fr/chess/addpiece.pdf


Note that Thierry Le Gleuher thinks most of

the problems won't have a deep reasoning,

and he provided N14A as an example, which

made a point. But i  still hope time (and you)

will prove him wrong. ;)

For example N1CQ, a "add N=1 piece" problem in

which the added piece will be a Q, type C,

doesn't seem trivial at all.



Best regards, Alain