# Square Enneomino Compatibility

## Introduction

The *square enneomino* is a polyomino made of nine squares
joined to form a 3×3 square.
The *compatibility problem*
is to find a figure that can be tiled with each of a set of polyforms.
Here I show minimal known compatibility figures for the square
enneomino with other polyominoes.
If you find a smaller solution or solve an unsolved case,
please let me know.

**Joseph
DiVincentis** found the two solutions with green squares.

## Domino

## Trominoes

## Tetrominoes

## Pentominoes

## Hexominoes

## Heptominoes

## Octominoes

## Rectangular Variants

For arranging polyominoes
into rectangles in general, see Michael Reid's
Rectifiable
Polyomino Page.

Last revised 2011-09-24.

Back to Pairwise Compatibility.

Back to Polyform Compatibility.

Back to Polyform Curiosities.

Col. George Sicherman
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