SquareBlocks (PuzzleMadness)

A SquareBlocks puzzle gives you an irregular grid of squares, often with notches and holes, and a set of coloured pieces built from joined squares, from a single cell to long bent shapes. Every piece has to go into the grid. The pieces may not overlap and no cell may be left empty, so the finished board is one solid patchwork of colours.

The outline of the grid does much of the work: a one-cell notch or a narrow arm can only take a few of the pieces, and the holes in the middle split the board into areas whose sizes must match the pieces placed there. The Medium board for 28 October 2026, for example, had eleven pieces to fit into an 8 by 8 outline with four holes and two bites out of its lower edge.

PuzzleMadness is a free puzzle website run by Dewi, a software developer who started out making games for the PlayStation 2, Nintendo Wii and DS and now builds the site as a hobby. It carries dozens of puzzle types, from classic sudoku to newer logic grids, and each one gets its own dated puzzle every day at each difficulty. SquareBlocks comes in Easy, Medium and Hard versions, and the Mixed page serves a fourth grid that differs from all three. Every one of the four is shared by everyone who opens it that day.

The site checks your grid as you go and tells you when it is finished; it does not publish solutions. Each completed puzzle earns a score, and scores feed a monthly and an all-time SquareBlocks leaderboard, where only your best attempt at a puzzle counts. Older days stay in the archive, so a missed puzzle can still be played later and still counts toward the current month. Playing needs no account; a free registration gives you a username on the leaderboards and a cloud save. The pages carry adverts.