[Retros] Add pieces

[Theodore Hwa]

On Tue, 8 Mar 2011, Otto Janko wrote:


> Alain BROBECKER wrote:

>

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

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

>

> Maybe better: "Add the _minimum_ number of pieces". I think it would be

> difficult to compose a problem in which it is not possible to add an

> additional piece (although not impossible).


Here's one possibility with 30 units, nobody in check: Starting from the 
initial position, remove the queens, and move the kings over to the 
queens' original squares.  It is not possible to add any pieces.

Ted