従属ぷよの回転方向に障害物(壁・ぷよ)がある場合の回転について説明します。
軸ぷよが壁際にあり従属ぷよを壁にぶつけるように回転させたとき、軸ぷよは壁と反対方向にはじかれるようにスライドし、従属ぷよが回転します。
壁でなく組ぷよ以外のぷよ際で回転させたときも同様の挙動となります。
2つ一組・3つ一組の組ぷよは軸ぷよがあるのではじかれますが、4つ一組の組ぷよは軸ぷよがないのではじかれることはありません。
これらの特徴を利用して組ぷよをコントロールすることをまわしと言います。
図1〜図4は、右壁での回転の例です。
図5〜図8は、左壁での回転の例です。
図9〜図12は、下壁での回転の例です。
図1〜図12で○は軸ぷよです。
_ _ _ _ _ _ | | | | | | | | | | | | | | | | | | | 右| | | | | | ●| | | | | | ○|⇒| ○●|⇒| ○ | | | | 右| | ● | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | └−−−−−−┘ └−−−−−−┘ └−−−−−−┘ |
_ _ _ _ _ _ | | | | | | | | | | | | | | | | | | | | | | | | | | | 左| | ● | | ○|⇒| ○●|⇒| ○ | | ●| | | | | | 左| | | | | | | | | | | | | | | | | | | | | | | | | | | | | └−−−−−−┘ └−−−−−−┘ └−−−−−−┘ |
_ _ _ _ _ _ _ _ | | | | | | | | | | | | | | | | | | | | | | | | | 右| | | | | | | | ▲| | ● | | | | | | ●○|⇒| ○▲|⇒| ○●|⇒| ▲○ | | | | 右| | 右▲ | | ● | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | └−−−−−−┘ └−−−−−−┘ └−−−−−−┘ └−−−−−−┘ |
_ _ _ _ _ _ _ _ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 左| | 左● | | ▲ | | ▲○|⇒| ○●|⇒| ○▲|⇒| ●○ | | ●| | ▲ | | | | | | 左| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | └−−−−−−┘ └−−−−−−┘ └−−−−−−┘ └−−−−−−┘ |
_ _ _ _ _ _ | | | | | | | | | | | | | | | | | | | | | | | | | | |右 | | ● | |○ |⇒|●○ |⇒| ○ | |● | | | | | |右 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | └−−−−−−┘ └−−−−−−┘ └−−−−−−┘ |
_ _ _ _ _ _ | | | | | | | | | | | | | | | | | | |左 | | | | | |● | | | | | |○ |⇒|●○ |⇒| ○ | | | |左 | | ● | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | └−−−−−−┘ └−−−−−−┘ └−−−−−−┘ |
_ _ _ _ _ _ _ _ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |右 | | ▲右 | | ● | |○● |⇒|▲○ |⇒|●○ |⇒| ○▲ | |▲ | | ● | | | | | |右 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | └−−−−−−┘ └−−−−−−┘ └−−−−−−┘ └−−−−−−┘ |
_ _ _ _ _ _ _ _ | | | | | | | | | | | | | | | | | | | | | | | | |左 | | | | | | | |● | | ▲ | | | | | |○▲ |⇒|●○ |⇒|▲○ |⇒| ○● | | | |左 | | ●左 | | ▲ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | └−−−−−−┘ └−−−−−−┘ └−−−−−−┘ └−−−−−−┘ |
_ _ _ _ _ _ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |⇒| |⇒| | | | | | | | | | | | | | | | | | | | | | | | | | | | | ○ | | ●○ | | ○●右 | | 右● | | | └−−−−−−┘ └−−−−−−┘ └−−−−−−┘ |
_ _ _ _ _ _ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |⇒| |⇒| | | | | | | | | | | | | | | | | | | | | | | | | | | | | ○ | | ○● | |左●○ | | ●左 | | | └−−−−−−┘ └−−−−−−┘ └−−−−−−┘ |
_ _ _ _ _ _ _ _ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |⇒| |⇒| |⇒| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 右 | | ▲ | | ● | | ○● | | ▲○ | | ●○ | | ○▲右 | | 右▲ | | ● | | | └−−−−−−┘ └−−−−−−┘ └−−−−−−┘ └−−−−−−┘ |
_ _ _ _ _ _ _ _ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |⇒| |⇒| |⇒| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 左 | | ● | | ▲ | | ▲○ | | ○● | | ○▲ | |左●○ | | ●左 | | ▲ | | | └−−−−−−┘ └−−−−−−┘ └−−−−−−┘ └−−−−−−┘ |