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Pros	Cons
"It takes very few keystrokes to set each piece in place, and you can even take advantage of DAS/ARR repeat across pieces for the OIL." - Larrytetris.	They are impractical and dangerous in modern multiplayer and will always remain an outside quirk of a blanket rule, in my book. The stack for them is not flat, and for the number of lines taken to do one (including the high overhang, which is I assume easy to get spiked on), their send-attack ratio is poor. With the number of pieces used, a normal t-spin double is nearly always better, and a tetris cleaner and less risky." - Paul676
Example 2a	Example 2b

Template:QuoteBox All uppercase was what was used in some machines in the past, as only 64 characters (6 bits) were encoded, instead of 128 (7 bits) that ASCII uses. You can see this as something like 20 to 5F below, as opposed to 00 to 7F:

	0	1	2	3	4	5	6	7	8	9	A	B	C	D	E	F
0x
1x
2x		!	"	#	$	%	&	'	(	)	*	+	,	-	.	/
3x	0	1	2	3	4	5	6	7	8	9	:	;	<	=	>	?
4x	@	A	B	C	D	E	F	G	H	I	J	K	L	M	N	O
5x	P	Q	R	S	T	U	V	W	X	Y	Z	[	\	]	^	_
6x	`	a	b	c	d	e	f	g	h	i	j	k	l	m	n	o
7x	p	q	r	s	t	u	v	w	x	y	z	{	|	}	~

The 00 to 1F and 7F are control characters, and are used for things like new line (enter key) and tab. 80 to FF was used in 8-bit encodings for different sets of foreign language letters and symbols. Here is one for Western European (CP-1252). AD is like minus but only appears at the end of lines, which is typographical. A0 is no-break space, so that words next to it will stay on one line. 81, 8D, 8F, 90 and 9D are undefined.

	0	1	2	3	4	5	6	7	8	9	A	B	C	D	E	F
8x	€		‚	ƒ	„	…	†	‡	ˆ	‰	Š	‹	Œ		Ž	
9x		‘	’	“	”	•	–	—	˜	™	š	›	œ		ž	Ÿ
Ax		¡	¢	£	¤	¥	¦	§	¨	©	ª	«	¬	­	®	¯
Bx	°	±	²	³	´	µ	¶	·	¸	¹	º	»	¼	½	¾	¿
Cx	À	Á	Â	Ã	Ä	Å	Æ	Ç	È	É	Ê	Ë	Ì	Í	Î	Ï
Dx	Ð	Ñ	Ò	Ó	Ô	Õ	Ö	×	Ø	Ù	Ú	Û	Ü	Ý	Þ	ß
Ex	à	á	â	ã	ä	å	æ	ç	è	é	ê	ë	ì	í	î	ï
Fx	ð	ñ	ò	ó	ô	õ	ö	÷	ø	ù	ú	û	ü	ý	þ	ÿ

Some machines didn't use 8-bit, instead, they replaced some of the characters with foreign letters (ISO 646). Here is an example for French:

	0	1	2	3	4	5	6	7	8	9	A	B	C	D	E	F
0x
1x
2x		!	"	£	$	%	&	’	(	)	*	+	,	-	.	/
3x	0	1	2	3	4	5	6	7	8	9	:	;	<	=	>	?
4x	à	A	B	C	D	E	F	G	H	I	J	K	L	M	N	O
5x	P	Q	R	S	T	U	V	W	X	Y	Z	°	ç	§	^	_
6x	µ	a	b	c	d	e	f	g	h	i	j	k	l	m	n	o
7x	p	q	r	s	t	u	v	w	x	y	z	é	ù	è	¨

This one includes more letters:

	0	1	2	3	4	5	6	7	8	9	A	B	C	D	E	F
0x
1x
2x		!	"	#	$	%	&	’	(	)	*	+	,	-	.	/
3x	0	1	2	3	4	5	6	7	8	9	:	;	<	=	>	?
4x	à	A	B	C	D	E	F	G	H	I	J	K	L	M	N	O
5x	P	Q	R	S	T	U	V	W	X	Y	Z	â	ç	ê	î	_
6x	ô	a	b	c	d	e	f	g	h	i	j	k	l	m	n	o
7x	p	q	r	s	t	u	v	w	x	y	z	é	ù	è	û

Due to a French reform making the letter é more frequent, î is sometimes replaced by É. There are similar character sets for many languages.

However, for closed caption decoders, the character set is different. The anomalies are in bold. 11 is placed before 30 to 3F for different sets of foreign language letters and symbols.

	0	1	2	3	4	5	6	7	8	9	A	B	C	D	E	F
0x
1x
2x		!	"	#	$	%	&	’	(	)	á	+	,	-	.	/
3x	0	1	2	3	4	5	6	7	8	9	:	;	<	=	>	?
4x	@	A	B	C	D	E	F	G	H	I	J	K	L	M	N	O
5x	P	Q	R	S	T	U	V	W	X	Y	Z	[	é	]	í	ó
6x	ú	a	b	c	d	e	f	g	h	i	j	k	l	m	n	o
7x	p	q	r	s	t	u	v	w	x	y	z	ç	÷	Ñ	ñ	█

Special characters (11xx). 39 is a non-breaking space.

	0	1	2	3	4	5	6	7	8	9	A	B	C	D	E	F
3x	®	°	½	¿	™	¢	£	♪	à		è	â	ê	î	ô	û

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