The squares of the six polyominoes depicted below are either filled or empty. What logic was used to determine whether a square filled?
+--+--+--+--+--+ +--+--+
|##| |##| |##| |##|##|
+--+--+--+--+--+ +--+--+ +--+--+
| | | | | |##|##| |##|##|
+--+--+--+--+ +--+--+--+--+ +--+--+
|##| |##| |##| | |##| | | |
+--+--+--+ +--+--+--+--+ +--+--+
| | |##| |##| |##|
+--+ +--+--+--+--+ +--+
|##| |##|
+--+--+ +--+--+--+
| |##| |##|
+--+--+ +--+--+--+--+ +--+
|##|##| |##| | | |
+--+--+ +--+--+--+--+ +--+
|##|##| |##|##| |##|
+--+--+--+--+ +--+--+ +--+--+--+
| | | | |##|##| | | | |
+--+--+--+ +--+--+ +--+--+--+
|##| | | |##| |##|
+--+--+--+ +--+--+--+
(In reply to
re(2): Bob, I made a question for you in my first comment. by pcbouhid)
We don't have that trouble here in Australia. Everybody is "mate" except for the philosophers who are all named "Bruce"