Heptomino Oddities

A polyomino oddity is a symmetrical figure formed by an odd number of copies of a polyomino. Here are the minimal known oddities with various symmetries for the 108 heptominoes. Many were found by Mike Reid.

For pentominoes, see Pentomino Oddities. For hexominoes, see Hexomino Oddities.

Lateral

Unsolved

Impossible

Holeless Variants

Diagonal

Unsolved

Impossible

Holeless Variants

Birotary

Unsolved

Impossible

Holeless Variants

Double Orthogonal

Holeless Variants

Double Diagonal

Holeless Variants

Quaternary Rotary

Holeless Variants

Full

Holeless Variants

Last revised 2022-08-28.

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Col. George Sicherman [ HOME | MAIL ]