Pentomino

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A pentomino is a polyomino of five squares.

The ancient pentomino puzzle uses free pentominoes. The recent iPhone game Twinflix mostly uses pentominos in its gameplay.

The shapes

There are 12 free pentominoes. Six of them are chiral, making a total of 18 one-sided pentominoes.

Symmetric

..........
..IIIII...
..........

I

...TTT....
....T.....
....T.....

T

...G.G....
...GGG....
..........

U

...L......
...L......
...LLL....

V

...Z......
...ZZ.....
....ZZ....

W

....T.....
...TTT....
....T.....

X

Chiral

These come in mirrored pairs:

.J......L.
.JJJ..LLL.
..J....L..

F

..SS..ZZ..
..S....Z..
.SS....ZZ.

Z

J........L
JJJJ..LLLL
..........

L

.I......I.
IIII..IIII
..........

Y

..SS..ZZ..
SSS....ZZZ
..........

N

.OO....OO.
.OOO..OOO.
..........

P

Naming conventions

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There is no universally agreed upon convention for naming one-sided pentominoes.

Official games that use pentominoes

Incomplete.

Non-official games that use pentominoes

Very incomplete.

External links