[Retros] Add pieces, 4th update

[Kevin Begley]

Correction, shaved another -- down to 13 units:

8/pp1p4/P7/p7/P1pk4/p1P5/PP6/2K5
Add one unit.

+bBf8


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

> 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

>>

>>

>>

>>

>> _______________________________________________

>> Retros mailing list

>> Retros at janko.at

>> http://www.pairlist.net/mailman/listinfo/retros

>>

>

>

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