[Retros] Add pieces

[Kevin Begley]

Hello Alain,

Seems you've excluded what is, for me, by far, the most interesting problems
of the "add" genre:
Illegal Clusters!
In my general experience, no other formal stipulation has proven to be half
as rewarding (retro or otherwise).
Similarly, Legal Clusters deserve consideration.

Further, it would be a shame not to include the identical categories for
fairy retros.
I'll never understand how retro enthusiasts, who must be acutely aware of
the historical bias against the retro genre (still present in the FIDE
Albums), often (routinely?) discount fairy retros.

As for your categorization, I'm not entirely clear on some technical points:
In "type A", for example, is check determined before- or after- units are
added?

Also, I fail to see how your divisions form an intelligent catalog.
Why not sub-divide based upon goals?

e.g.,

A) Orthodox
B) Fairy

A1) Add to achieve legality / illegality
A2) Add units to allow/prevent direct-play (e.g., #n x-solutions / s#n / r#n
/ prevent =n, etc)
A3) Add units to allow/prevent  help-play (e.g., h#n / hs#n / PGn, etc)
A4) Add units to infer something about the previous moves in the game
(e.g., prove OO occurred, prove Bc8 was promoted, etc)
A5) etc
...

B1) Add to achieve legality / illegality
 B1A) Clusters
B2) Add units to allow/prevent direct-play (#n  / ser.#n / ser.PGn, etc)
B3) Add units to allow/prevent help-play (h#n / prevent hs#n / h-00-n /
ser.h-ep-n, etc)
B4) Add units to infer something about the previous moves in the game
(e.g., prove OO did not occurr, prove Bc8 was reborn, etc)
B5) etc
...

If you need to, you can always sub-divide these categories (as illustrated
by the "Cluster" category) -- though, I'm not certain why you care to
distinguish between problems in which a royal unit is/isn't under attack.

At any rate, I hope this helps, and wish you great success with this
endeavor...

Best,
Kevin


On Tue, Mar 8, 2011 at 12:10 PM, Alain BROBECKER <abrobecker at yahoo.com>wrote:


> Dear retro friends,

>

>

>

> With the birthday tourney of Thierry Le Gleuher, there

>

> were new records in problems with "Add pieces" stipulation.

>

> I was interested enough so as to start a compilation of

>

> this kind of problems. After some thoughts the possible

>

> categories seem to be:

>

>

>

> * Type A : no king in check

>

>  Type C : at least one king in check

>

>  Type ? : the color of the piece to add is given

>

>  Type ?? : the nature of the piece is given

>

> * The number of pieces is given ("add N pieces")

>

>  The number of pieces is not given ("complete the position"

>

>  or "add the pieces", maybe no piece to add (joke?))

>

> * For "add 1 piece" and "complete" (+1), nature of the piece

>

>  to add (K/Q/R/B/N/P, promotion pieces...)

>

> * Diagram with or without promoted men.

>

>

>

> Here are the records has pointed out by Nikolai Beluhov on

>

> the problem database, and some more.

>

>

>

> Maximum number of pieces to add (9) for a legal position, Type C

>

> or economy records for "complete the position" (+9) Type C

>

>  Michel CAILLAUD

>

>  Jubilé Thierry Le Gleuher-50, 2010, 2nd comm.

>

>  3BRbBr/1pp5/4k1QK/p7/3pRqnr/1P2P3/2PP1PP1/1b6

>

>  12+11: Add the missing pieces.

>

>

>

> Economy records for "complete the position" (+6) Type C

>

>  Dmitrij Baibikow (P1080647)

>

>  503 Schachmatnaja komposizija 74 2006

>

>  8/1PPPp3/BpQp2P1/r2p4/2k5/K2PP3/2R1P3/q1bb4

>

>  11+9: Add pieces.

>

>

>

> Record with coloring (?)

>

>  Dmitrij Baibikow (P1080648)

>

>  461 Schachmatnaja komposizija 68 2005, 1. Preis

>

>  8/1P4P1/3N1N2/2RKB3/3Q1N2/Q1KN4/1P3RP1/8

>

>  15+0: Color the pieces and add 17 pieces.

>

>

>

> Add 1 piece, P, Type A

>

>  Alain BROBECKER (P1189477)

>

>  Jubilé Thierry Le Gleuher-50, 2010, 1st comm.

>

>  8/1p5p/6pP/p4pPP/1k4pP/7p/KPP3P1/8

>

>  8+8: Add one piece.

>

>

>

> Add 1 piece, B, Type A

>

>  Henrik Juel (P1000069)

>

>  2nd Prize, Thema Danicum n°86, 1997

>

>  4k3/ppp1pp2/4pp2/8/3P4/3P2P1/1PpP1PP1/2K5

>

>  8+9: Add one unit. Last move?

>

>

>

> Add 1 piece, K, Type C

>

>  Nikolai Beluhov (or Andrey Frolkin?)

>

>  problem database, 2011-3-6

>

>  4k3/3P4/8/7B/8/8/8/8

>

>  2+1: Add one piece!

>

>

>

> Add 1 piece, R, Type C

>

>  Andrey Frolkin (P1189330)

>

>  problem database, 2011/03

>

>  6r1/8/8/4k3/8/8/7B/B5K1

>

>  3+2: Add one piece.

>

>

>

> Add 1 piece, N, Type C

>

>  Alexander Yarosh (P1189060)

>

>  532 Schachmatnaja komposizija n°79, p. 61, 2007

>

>  8/1p1p4/8/1p6/p1p1p3/Rpp5/2K5/k7

>

>  2+9: Add one piece.

>

>

>

> Add 1 piece, P, Type ?

>

>  Alain Brobecker

>

>  2011/03

>

>  8/8/8/8/8/5r1K/5k1R/8

>

>  2+2: Add one white piece.

>

>       (b) Add one black piece.

>

>

>

>

>

> I'm quite willing to make a booklet with the results of the

>

> hunt for such records. For the moment the categories to

>

> include are unclear in my mind, except for

>

>  "Complete the position" (+1) type A/C + nature

>

>  "add 1 piece" type A/C + nature

>

>  Economy records for "complete the position" (+N) type A/C

>

> Which makes for at least (6+6+10)*2 problems to find.

>

>

>

> Any comments (and new records! ;) are welcome.

>

>

>

> Best regards, Alain

>

> Alain Brobecker (abrobecker at yahoo.com) |_  _  _ |_

> http://abrobecker.free.fr/             |_)(_|(_|| ) of  Arm's Tech

>

>

>

>

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