[Retros] Add pieces, 4th update

[Kevin Begley]

It is a shame to replace N1AB, but it can be reduced from 17 units down to
14...

fen: 2k5/pp1p4/P7/p2p4/P7/p3P3/PP1P4/4K3  (7+7)
White : Ke1 Pa6a4e3a2b2d2
Black : Kc8 Pa7b7d7a5d5a3
Add one unit.

+wBf1

Best,
Kevin


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:

>  http://abrobecker.free.fr/chess/addpiece.pdf

>

> 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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>

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