[Retros] Add pieces

Theodore Hwa hwatheod at cs.stanford.edu
Sat Mar 12 01:10:06 EST 2011

On Fri, 11 Mar 2011, Theodore Hwa wrote:

> 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.

26 units: From the initial positions, remove queens and bishops. Move
kings onto c1/c8, and knights or rooks onto f1/f8.


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