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For challenges that involve polyominoes of some sort. Polyominoes are shapes made of concatenating the edges of equally sized squares to create a form of square tiling. Tetris is a well known example of something involving polyominoes. This tag also refers to challenges that relate to polyominoes formed with shapes other than squares (also known as polyforms)

Polyominoes and polyforms are shapes created by joining identical polygons edge to edge. For example, the game Tetris uses tetrominos as game pieces:

Tetrominos used in Tetris

This tag is for challenges that relate to either polyominoes or polyforms, such as challenges about displaying such shapes, challenges based around numbers relating to them, and more.

This often overlaps with the , and tags.