Daily Fillomino
The rule
Each number is the size of the block it belongs to, and two blocks of the same size never touch.
Divide the grid into blocks and write in every cell the size of the block it sits in. A block of three holds three 3s, a lone cell holds a 1.
Two blocks of the same size may not touch side to side. They may touch at a corner, which is what makes a line of the same digit worth reading carefully: it is either one block or two that happen to meet diagonally.
A printed 1 is the most useful clue on the grid. Its block is finished the moment you see it, so none of its four neighbours can be a 1 either.
Controls
Click a cell and type a digit, or use the pad. Space toggles pencil marks. Arrow keys move. Progress saves in this browser as you go, so you can come back to the same puzzle later today.
Solvable Without Guessing
Every puzzle here was generated and then handed to a solver that is only allowed techniques a person can use. If it could not finish the grid without a guess, the puzzle was thrown away rather than published. That also makes the answer unique, because every step it took was forced.
More to Play
There are twenty one daily sudoku variants, a 15 puzzle, peg solitaire and a nonogram with hand drawn pictures. For puzzles you can hold, see mechanical puzzles.