[Retros] Add pieces, 4th update

[Kevin Begley]

Here's a simple correction of 7+7.
5k2/4p1p1/P7/P3p2p/P2P3p/7p/1P1P4/5K2
Add one unit.

+wBc1


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

>> 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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