Polyomino Semi-Oddities
Introduction.
A polyomino semi-oddity
is a figure with four-way symmetry or better formed by an even
number of copies of a polyomino that is not a multiple of 4.
Here are the minimal known semi-oddities
for polyominoes of order up through 8.
Double Orthogonal
Holeless Variant
Double Diagonal
Holeless Variant
Quaternary Rotary
Unsolved
Impossible
Full Symmetry
Unsolved
Impossible
Holeless Variant
Double Orthogonal
Holeless Variants
Double Diagonal
Unsolved
Holeless Variants
Quaternary Rotary
Unsolved
Impossible
Holeless Variants
Full Symmetry
Unsolved
Impossible
Holeless Variants
Quaternary Rotary
Full Symmetry
Last revised 2023-06-13.
Back to Polyform Oddities
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Polyform Curiosities
Col. George Sicherman
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