[Retros] Add pieces, first update

Alain BROBECKER abrobecker at yahoo.com
Wed Mar 9 15:31:45 EST 2011

Dear retro friends,

Added problem 1C6 (will have to change notation soon
though) and some infos on authors. Problems will be
organised with number of pieces (~ difficulty), and
when there's a tie, the oldest one first. Will have
to add "add N pieces" columns in second table too.


best, Alain

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