[Retros] Add pieces, 4th update
kevinjbegley at gmail.com
Mon Mar 14 04:19:55 EDT 2011
Here's a simple correction of 7+7.
Add one unit.
On Mon, Mar 14, 2011 at 12:41 AM, Kevin Begley <kevinjbegley at gmail.com>wrote:
> 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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