[Retros] Add pieces, 4th update
kevinjbegley at gmail.com
Mon Mar 14 03:07:39 EDT 2011
It is a shame to replace N1AB, but it can be reduced from 17 units down to
fen: 2k5/pp1p4/P7/p2p4/P7/p3P3/PP1P4/4K3 (7+7)
White : Ke1 Pa6a4e3a2b2d2
Black : Kc8 Pa7b7d7a5d5a3
Add one unit.
On Sun, Mar 13, 2011 at 10:07 AM, Alain BROBECKER <abrobecker at yahoo.com>wrote:
> 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
> Retros mailing list
> Retros at janko.at
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