The basic rule is the same as a puzzle called number place (pre-naan), Sudoku.
I prepare a number for the sense such as the Rubiks Cube.
Of the block of length, the color same as each horizontal row
Numbers from 1 to 9 are completion without overlap to for each nine trouts.
When I am involved in nine block (3x3) of each color
By 90 degrees turns to the right.