[Retros] Add units: 15th update

Alain BROBECKER abrobecker at yahoo.com
Mon May 30 17:03:15 EDT 2011

Dear retro friends,

A new update of the "Add units" booklet can be found here:

Modified N2Ai (previous version cooked by Mu-Tsun Tsai)
and 2A which was improved.

Regarding N2Ai, here's another version:
Alain Brobecker & Computer, Original 2011/04/04
It has 11 squares that are controlled twice, but i prefer
the one in the booklet since it has BK not on the edge and
7 squares controlled twice (no position with >7 has
solution with BK inside).

Best regards, Alain

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