Thumbnails

For example, see these grid collections:

• from an entire month from, say, one year ago
• from one particular constructor
• with the fewest black squares
• published on a particular day of the year, say April First
• with unusual symmetry
• picked by Will Shortz as his favorites
• that have unchecked squares

There are dozens more categories. Look for "Thumbnail" links at the tops of pages you find interesting.