[Retros] Add pieces

Theodore Hwa hwatheod at cs.stanford.edu
Sat Mar 12 00:42:16 EST 2011

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.


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