Diamond Crosswords are compact, diamond-shaped grids with fewer clues. They can be completed even when you only have a few moments to spare.
Tap on the Daily Diamond option on the main menu to view the grid. A new puzzle will be available to unlock for free each day. Look for the option to 'Play today's FREE Daily Diamond' below the map.
The Daily Diamond puzzles are separate from the puzzles used in the World's Biggest Crossword grid, but still count towards quests and achievements.