Daily Dominosa
The rule
Every domino from double blank to double five is hidden in the grid, each one exactly once. Work out where one ends and the next begins.
Click two touching numbers to join them into a domino. Click either half again to break it apart.
Where to start
Look for a pair of numbers that can only sit together in one place on the whole grid. Place it, and the cells around it lose options at once. The double five is often the easiest to find.
Controls
Progress saves in this browser as you go, so you can come back to the same grid later today.
Solvable Without Guessing
A grid of numbers does not automatically hide exactly one arrangement of dominoes. Most do not, which is why each of these was handed to a solver allowed only two moves: place a domino that has one possible home left, and settle a square that only one domino can still cover. If that was not enough to finish, the grid was thrown away rather than published.
More to Play
There are futoshiki, suguru and binairo, twenty one daily sudoku variants, and a 15 puzzle. The physical puzzles are in mechanical puzzles.