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| '''TGM rotation''' is a game play mechanic used in ''[[Tetris The Grand Master]]'' and other Arika tetromino games, derived from [[Sega rotation]]. It is often refered to as ARS (Arika Rotation System), even though some people believe that this name is misleading.
| | #REDIRECT:[[ARS]] |
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| Games using TGM rotation generally use [[IRS#IRS|IRS]], fast [[DAS]], [[lock delay]], and firm [[drop]], and tetrominoes start out with the topmost block on the top row (generally row 20). The "ARS" and "ARS2" modes of ''[[Tetris The Grand Master Ace]]'' use a hybrid of TGM rules and [[Tetris Guideline|Guideline]] rules.
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| == Basic rotation ==
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| TGM's basic rotations inherits most of its properties from [[Sega rotation]], which was used in most previous Japanese arcade Tetris games. Some defining characteristics include:
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| * Having 2 (as opposed to 4) rotation states for S, Z, and I tetrominoes.
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| * Keeping tetrominoes at an even level while rotating to always allow rotation when the tetromino is on a flat surface (except for the I tetromino - see exceptions below).
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| * Pointing the initial stance of the T, L, and J tetrominoes downward.
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| [[Image:Tgm basic ars description.png|left|frame|TGM's basic rotations.]]
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| <br clear="all">
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| == Wall kicks ==
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| TGM pioneered the use of [[wall kick]]s, with simple but effective kick rules. These rules were unchanged until [[Tetris The Grand Master 3 Terror-Instinct|TGM3]], remaining constant across [[Tetris The Grand Master|TGM]], [[Tetris The Absolute The Grand Master 2|TA]], [[Tetris The Absolute The Grand Master 2 PLUS|TAP]], and [[Tetris with Cardcaptor Sakura Eternal Heart|Sakura Tetris]]. Up to 3 locations are tried, in this order, before rotation will fail:
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| *Basic rotation
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| *1 space right of basic rotation
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| *1 space left of basic rotation
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| In addition to these rules, there are some extra exceptions where certain wall kicks are not allowed:
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| *The I tetromino will never kick.
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| *L, J, and T tetrominoes will not rotate in the situations illustrated below if the [[Image:XTet.png|X]] marked block is occupied.
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| {|
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| |width="200pt"|{{pfstart}}
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| {{pfrow| | | | | | | |X| | }}
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| {{pfrow| |L|L|L| | |L|L|L| }}
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| {{pfrow| |L|X| | | |L| | | }}
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| {{pfend}}
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| |width="200pt"|{{pfstart}}
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| {{pfrow| | |X| | | | | | | }}
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| {{pfrow| | | |L| | | |X|L| }}
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| {{pfrow| |L|L|L| | |L|L|L| }}
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| {{pfend}}
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| |-
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| |{{pfstart}}
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| {{pfrow| | | | | | | |X| | }}
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| {{pfrow| |J|J|J| | |J|J|J| }}
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| {{pfrow| | |X|J| | | | |J| }}
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| {{pfend}}
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| |{{pfstart}}
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| {{pfrow| | |X| | | | | | | }}
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| {{pfrow| |J| | | | |J|X| | }}
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| {{pfrow| |J|J|J| | |J|J|J| }}
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| {{pfend}}
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| |-
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| |{{pfstart}}
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| {{pfrow| | |X| | | | |X| | }}
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| {{pfrow| | |I| | | |I|I|I| }}
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| {{pfrow| |I|I|I| | | |I| | }}
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| {{pfend}}
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| |}
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| *However, L tetrominoes will rotate clockwise and J tetrominoes counterclockwise in the situations illustrated below if both the [[Image:XTet.png|X]] marked blocks are occupied.
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| {|
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| |width="200pt"|{{pfstart}}
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| {{pfrow| |X| | | | | | |X| }}
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| {{pfrow| |L|L|L| | |J|J|J| }}
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| {{pfrow| |L|X| | | | |X|J| }}
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| {{pfend}}
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| |}
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| == New wall kicks in TGM3 ==
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| === I tetromino's wall kicks ===
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| In TGM3, the I tetromino can kick walls. There are 3 different types of wall kicks.
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| {|
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| |width="200pt"|{{pfstart}}
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| {{pfrow|G| |Z| | | | | | | }}
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| {{pfrow|G| |C| | | | | | | }}
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| {{pfrow|G| |Z| | | | | | | }}
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| {{pfrow|G| |Z| | | | | | | }}
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| {{pfend}}
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| Try to rotate
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| |width="200pt"|{{pfstart}}
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| {{pfrow|G| | | | | | | | | }}
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| {{pfrow|X|Z|C|Z| | | | | | }}
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| {{pfrow|G| | | | | | | | | }}
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| {{pfrow|G| | | | | | | | | }}
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| {{pfend}}
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| Basic rotation fails
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| |width="200pt"|{{pfstart}}
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| {{pfrow|G| | | | | | | | | }}
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| {{pfrow|G|Z|Z|C|Z| | | | | }}
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| {{pfrow|G| | | | | | | | | }}
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| {{pfrow|G| | | | | | | | | }}
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| {{pfend}}
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| Kick 1 space right
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| |-
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| |width="200pt"|{{pfstart}}
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| {{pfrow|G|G|Z| | | | | | | }}
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| {{pfrow|G|G|C| | | | | | | }}
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| {{pfrow|G|G|Z| | | | | | | }}
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| {{pfrow|G|G|Z| | | | | | | }}
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| {{pfend}}
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| Try to rotate
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| |width="200pt"|{{pfstart}}
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| {{pfrow|G|G| | | | | | | | }}
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| {{pfrow|X|X|C|Z| | | | | | }}
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| {{pfrow|G|G| | | | | | | | }}
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| {{pfrow|G|G| | | | | | | | }}
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| {{pfend}}
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| Basic rotation fails
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| |width="200pt"|{{pfstart}}
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| {{pfrow|G|G| | | | | | | | }}
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| {{pfrow|G|G|Z|Z|C|Z| | | | }}
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| {{pfrow|G|G| | | | | | | | }}
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| {{pfrow|G|G| | | | | | | | }}
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| {{pfend}}
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| Kick 2 space right
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| |-
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| |width="200pt"|{{pfstart}}
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| {{pfrow| | | | | | | | |Z|G}}
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| {{pfrow| | | | | | | | |C|G}}
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| {{pfrow| | | | | | | | |Z|G}}
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| {{pfrow| | | | | | | | |Z|G}}
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| {{pfend}}
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| Try to rotate
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| |width="200pt"|{{pfstart}}
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| {{pfrow| | | | | | | | | |G}}
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| {{pfrow| | | | | | |Z|Z|C|X}}
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| {{pfrow| | | | | | | | | |G}}
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| {{pfrow| | | | | | | | | |G}}
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| {{pfend}}
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| Basic rotation fails
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| |width="200pt"|{{pfstart}}
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| {{pfrow| | | | | | | | | |G}}
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| {{pfrow| | | | | |Z|Z|C|Z|G}}
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| {{pfrow| | | | | | | | | |G}}
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| {{pfrow| | | | | | | | | |G}}
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| {{pfend}}
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| Kick left
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| |}
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| === I tetromino's floor kicks ===
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| The I tetromino can kick the floor.
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| Notes:
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| *Like [[hold piece]], floor kick can be performed only once per tetromino.
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| *This action causes [[lock delay]] reset.
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| *The tetromino cannot kick the floor in mid-air.
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| {|
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| |width="200pt"|{{pfstart}}
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| {{pfrow| | | | | | | | | | }}
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| {{pfrow|Z|Z|C|Z| | | | | | }}
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| {{pfrow| | | | | | | | | | }}
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| {{pfrow|G|G|G|G| | | | | | }}
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| {{pfend}}
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| Fail
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| |width="200pt"|{{pfstart}}
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| {{pfrow| | | | | | | | | | }}
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| {{pfrow| | | | | | | | | | }}
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| {{pfrow|Z|Z|C|Z| | | | | | }}
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| {{pfrow|G|G|G|G| | | | | | }}
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| {{pfend}}
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| OK
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| |width="200pt"|{{pfstart}}
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| {{pfrow| | | | | | | | | | }}
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| {{pfrow|Z|Z|C|Z| | | | | | }}
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| {{pfrow| |G| | | | | | | | }}
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| {{pfrow| |G|G| | | | | | | }}
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| {{pfend}}
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| OK
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| |}
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| There are 2 different types of floor kicks.
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| {|
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| |width="200pt"|{{pfstart}}
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| {{pfrow| | | | | | | | | | }}
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| {{pfrow| | | | | | | | | | }}
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| {{pfrow| | | | | | | | | | }}
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| {{pfrow|Z|Z|C|Z| | | | | | }}
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| {{pfrow|G| | | | | | | | | }}
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| {{pfrow|G|G|G|G| | | | | | }}
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| {{pfend}}
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| Try to rotate
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| |width="200pt"|{{pfstart}}
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| {{pfrow| | | | | | | | | | }}
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| {{pfrow| | | | | | | | | | }}
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| {{pfrow| | |Z| | | | | | | }}
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| {{pfrow| | |C| | | | | | | }}
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| {{pfrow|G| |Z| | | | | | | }}
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| {{pfrow|G|G|X|G| | | | | | }}
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| {{pfend}}
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| Basic rotation fails
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| |width="200pt"|{{pfstart}}
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| {{pfrow| | | | | | | | | | }}
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| {{pfrow| | |Z| | | | | | | }}
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| {{pfrow| | |C| | | | | | | }}
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| {{pfrow| | |Z| | | | | | | }}
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| {{pfrow|G| |Z| | | | | | | }}
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| {{pfrow|G|G|G|G| | | | | | }}
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| {{pfend}}
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| Kick 1 space up
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| |-
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| |width="200pt"|{{pfstart}}
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| {{pfrow| | | | | | | | | | }}
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| {{pfrow| | | | | | | | | | }}
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| {{pfrow| | | | | | | | | | }}
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| {{pfrow|Z|Z|C|Z| | | | | | }}
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| {{pfrow|G|G|G|G| | | | | | }}
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| {{pfrow|G|G|G|G| | | | | | }}
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| {{pfend}}
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| Try to rotate
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| |width="200pt"|{{pfstart}}
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| {{pfrow| | | | | | | | | | }}
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| {{pfrow| | | | | | | | | | }}
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| {{pfrow| | |Z| | | | | | | }}
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| {{pfrow| | |C| | | | | | | }}
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| {{pfrow|G|G|X|G| | | | | | }}
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| {{pfrow|G|G|X|G| | | | | | }}
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| {{pfend}}
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| Basic rotation fails
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| |width="200pt"|{{pfstart}}
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| {{pfrow| | |Z| | | | | | | }}
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| {{pfrow| | |C| | | | | | | }}
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| {{pfrow| | |Z| | | | | | | }}
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| {{pfrow| | |Z| | | | | | | }}
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| {{pfrow|G|G|G|G| | | | | | }}
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| {{pfrow|G|G|G|G| | | | | | }}
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| {{pfend}}
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| Kick 2 space up
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| |}
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| === T tetromino's floor kicks ===
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| The T tetromino can escape from a hollow.
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| Notes:
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| *This action can be performed only once per tetromino.
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| *This action causes [[lock delay]] reset.
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| {|
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| |width="200pt"|{{pfstart}}
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| {{pfrow|G| | | | | | | | | }}
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| {{pfrow|G| |I| | | | | | | }}
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| {{pfrow|G|I|I| | | | | | | }}
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| {{pfrow|G|G|I|G|G|G|G|G|G| }}
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| {{pfend}}
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| Try to rotate
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| |width="200pt"|{{pfstart}}
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| {{pfrow|G| | | | | | | | | }}
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| {{pfrow|G| | | | | | | | | }}
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| {{pfrow|G| |I| | | | | | | }}
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| {{pfrow|G|X|I|X|G|G|G|G|G| }}
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| {{pfend}}
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| Basic rotation fails
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| |width="200pt"|{{pfstart}}
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| {{pfrow|G| | | | | | | | | }}
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| {{pfrow|G| |I| | | | | | | }}
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| {{pfrow|G|I|I|I| | | | | | }}
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| {{pfrow|G|G| |G|G|G|G|G|G| }}
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| {{pfend}}
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| Kick up
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| |}
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| == Right side bias ==
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| In TGM's rotation system, the Tetrominoes rotatate on only one axis resulting in asymmetrical rotations. In this example, the I piece can't rotate on the left side of the stack;
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| {{pfstart}}
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| {{pfrow| | |Z| | | | | | | }}
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| {{pfrow| | |Z| | | | | | | }}
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| {{pfrow| | |X|G|G|G|G|G|G|G}}
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| {{pfrow| | |x|G|G|G|G|G|G|G}}
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| {{pfrow| |G|G|G|G|G|G|G|G|G}}
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| {{pfend}}
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| A situation which would work on the right side.
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| Notice the I has 1 rotation axis;
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| {{pfstart}}
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| {{pfrow| |Z|Z|C|Z}}
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| {{pfend}}
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| I piece's rotation axis
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| This case does not apply to the T tetromino, as it rotates on it's center;
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| {{pfstart}}
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| {{pfrow| |I| }}
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| {{pfrow|I|C|I}}
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| {{pfend}}
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| T rotation axis
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| ==To-Do==
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| *describe ACE's ARS and ARS2
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| *describe "Mihara's conspiracy"
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| *mention right bias (Complete)
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| *add more visual aids?
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| == References ==
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| *[http://web.iis.to/tetris_tgm/newrotation.html KAN's detailed explanation of TGM3's new I and T floorkicks]
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| *[http://www13.plala.or.jp/TETRiS_TGM/kouza/index.htm TGM rotations, in Japanese]
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| [[Category:Rotation Systems]]
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