These puzzles use the 13 tetrograms
and the four trigrams. The pieces cover an area of
64
units.

Geometric Forms

Use
all the pieces to make a symmetric pattern. Here are examples
for the different types of symmetry. If the pieces are confined
to the grid, true symmetry is impossible in the vertical axis.
However, if the pieces are regarded as distorted squares, then
we can treat a pattern as symmetric if the equivalent polyomino
construction is.

Type of Symmetry

Full

Tetrarotary

Double Bilateral

Reflective

Double Diagonal

Diagonal

Birotary

Tetrogram Replicas

Fourfold replicas can be constructed for each of the thirteen tetrograms.