Pentomino
Twelve pieces, five squares each, and a space they fill exactly.

Play pentomino online, an interactive game for dragging pieces formed by 5 squares that fit together. A two-dimensional maths and geometry game: pentominoes, made up of figures formed by pixels. Choose a figure on the right and place the pieces until you manage to reproduce it.
Controls
Drag a piece to position it; rotate before placing.
How to Play
- Identify the pieces with the fewest possible placements.
- Place those first, at the edges or corners.
- Fill the interior with the flexible pieces.
- Tile the whole space with no gaps.
Tips & Tricks
Start with the awkward pieces. The flexible ones will still fit later; the difficult ones will not.
Frequently Asked Questions
How many pentomino pieces are there?
Twelve distinct shapes, each built from five squares — that fixed set is what makes the tiling problem well defined.
Is there always a solution?
The boards are built to be tileable, so a stuck arrangement means a placement earlier on was wrong rather than the board being impossible.