# Uniform Polyomino Stacks

A *uniform polyomino stack* is a figure
formed by joining copies of a polyomino, having the same
contiguous length of cells in every row.
Such a figure is compatible with every linear polyomino.
Here are minimal known uniform stacks for polyominoes
of orders 1 through 7.
If you find a smaller solution or solve an unsolved case,
please write.

### Impossible

### Impossible

Last revised 2016-05-06.

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George Sicherman
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