# Galvagni Figures & Reid Figures for Hexominoes

A *hexomino* is a figure made of six squares joined
edge to edge.
A *Galvagni figure* is a figure that can be tiled by a polyform
in more than one way—a kind of self-compatibility figure.
A *Reid figure* is a Galvagni figure without holes.
Most of the hexomino Galvagni and Reid figures were found by
Michael
Reid of the University of Central Florida
and
Erich Friedman
of Stetson University.
Corey Plover found the 12-tile Galvagni figure below.

See also Galvagni & Reid Figures for Pentominoes,
Galvagni & Reid Figures for Heptominoes,
and
Galvagni & Reid Figures for Octominoes,

## Galvagni Figures

## Reid Figures

## Level Galvagni Figures

Level polyominoes may be reflected orthogonally and rotated 180° but
not 90°.
For a discussion of restricted-symmetry polyominoes see
Alexandre Owen Muñiz's A Polyformist's Toolkit.

### Holeless Variants

*Last revised 2012-07-28.*

Back to Galvagni Compatibility.

Back to Polyform Compatibility.

Back to Polyform Curiosities.

Col. George Sicherman
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