Pentomino

A pentomino is a polyomino of five squares. The ancient pentomino puzzle uses free pentominoes.

The shapes

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

Symmetric

I	T	U
V	W	X

Chiral

These come in mirrored pairs:

F	Z	L
Y	N	P

Naming conventions

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

Pentomino names in various games/conventions

Game / Convention
Wikipedia	I	V	T	U	W	X	J	L	N'	N	Y	Y'	P	Q	F	F'	Z	S
Jstris	I5	V5	T5	U5	W5	X5	J5	L5	S5	Z5	TL	TJ	OZ	OS	TS	TZ	LL	JJ
Techmino	I5	V	T5	U	W	X	J5	L5	H	N	Y	R	P	Q	F	E	Z5	S5
Spirit Drop	I5	V5	T5	U5	W5	X5	J5	L5	h5	h'5	y5	r5	P5	Q5	f'5	f5	Z5	S5
Shiromino	I5	V	T5	U	W	X	J5	L5	G	N	Ya	Yb	P	Q	Fa	Fb	Z5	S5

Official games that use pentominoes

Incomplete.

• Tetris 2 + Bombliss in Bombliss mode.
• Magical Tetris Challenge in Magical Tetris mode.
• Tetris 64 in Bio Tetris mode.
• Pokémon Tetris
• Puyo Puyo Tetris in Party mode.
• Tetris Effect as a signature attack of the boss Capricorn.

Non-official games that use pentominoes

Very incomplete.

• Jstris in Penta and All-29 piece sets.
• Pentix
• EGAint, depending on the piece set.
• Techmino
• Spirit Drop
• Shiromino
• MultiMino
• Pent-up