[Retros] Add pieces, 4th update

Alain BROBECKER abrobecker at yahoo.com
Sun Mar 13 13:07:21 EDT 2011

Dear retro fans,

As usual, new version can be found here:

Considering suggestions, remarks:
* "Add minimal number of pieces" is the same as
add N pieces with an illegal position? So it's
just a question of modifying the stipulation?
* Aa, Ac, Ca, Cc: i wonder if it's worth it, it seems
all C are Cc? (can someone prove me wrong and find
a Ca?).
* illegal/legal positions = "add pieces so that position
becomes/remains legal" seems to me the more interesting
subdivision. For the moment no problem needs that
subdivision, but if one comes across (eg N1A? with
illegal position) i will consider changing categories.
* I'm ashamed of NA2, which, as NA14, is not very
interesting (and unlike N1AK IMO). Shall we consider
problems with K additions apart from others, as in NA1?

I will probably calm down a bit on the updates, but
i hope we'll have enough news for next WE.

Best regards, Alain

Alain Brobecker (abrobecker at yahoo.com) |_ _ _ |_
http://abrobecker.free.fr/ |_)(_|(_|| ) of Arm's Tech

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