Here we have one standard set of dominoes:

Find the edges of the dominoes.

Um, I don't know how else to draw this without taking forever:

|------|
|--||--|
--||||--
--|--|--
|--||--|
|--||--|
--------

-- is a horiztonal domino

|  is a vertical domino
|

I hope that makes sense.

Posted by tomarken on 2006-03-24 13:46:12