[Retros] Add pieces, 4th update
kevinjbegley at gmail.com
Mon Mar 14 03:41:24 EDT 2011
Err, these aren't quite sound -- stay tuned for a correction, I am having
difficulty counting today :)
On Mon, Mar 14, 2011 at 12:07 AM, Kevin Begley <kevinjbegley at gmail.com>wrote:
> 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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