Fillomino (PuzzleMadness)

Fillomino asks you to split the grid into groups of squares joined side by side, where every square in a group holds the group's size. A group of three holds three 3s. Two groups of the same size may not touch along an edge, or they would be one group. The start gives some numbers, and on PuzzleMadness every group has at least one given number, so you never invent a new group.

The daily page opens today's puzzle on its own, and its title carries the date (on 3 October 2026 it read "Daily Medium Fillomino Puzzle for Saturday 3rd October 2026"). There is a separate dated puzzle for each size: Small, Medium, Large and Mixed. Past days stay in the archive, so a missed puzzle can be played later, and there is a print version and an image download of the grid. PuzzleMadness does not publish solutions: the site tells you when you have finished a grid correctly or made a mistake. Each completed puzzle adds to your total on the Fillomino monthly and all-time leaderboards, where only your best score on any one puzzle counts.

Grow the given numbers that can only expand one way first. Completed groups change colour on PuzzleMadness, which makes it easy to see what is done. Watch for 1s, which close at once, and for two equal numbers near each other that must either join or be kept apart.

PuzzleMadness is a British puzzle site with dozens of daily puzzle types in the browser, from many sudoku variants to logic grids such as Nurikabe, Hashi and Slitherlink. It is free to play and carries ads. A free account keeps track of the puzzles you have finished and puts your name on the leaderboards, and the badges next to usernames mark how many puzzles a player has completed.