The rule is the same as “Number Place”, so that the same color is not arranged in each row, column, block (3x3).
It is no longer possible to solve with only one face, and mutual faces can be solved by mutually solving surrounding cells that are shared with the side faces.
The game screen is displayed in 3D, and the answer is advanced while looking at not only the front but also the side cells.
In “Number Place” so far, it can be solved by row, column, block (3x3), but in “3D Color Place”, it may not be solved unless the opposite column and block (3x3) are confirmed.
It is different from the previous "Number Place".
Please read the in-app help (especially "Basic rules of 3D Color Place" and "Advanced rules for 3D Color Place") once before playing.

・ You can choose the difficulty of the problem from easy, medium and hard.
・The game screen is displayed in 3D, and you will answer while rotating the cube.
It can also be solved in 2D display.
・The game is automatically saved even if it is interrupted, and can be resumed from the previous end.
・Since there is a history solved so far, it can be restored.
・Duplicate cells can be confirmed if there are cells of the same color by "Auto Error Check".
・You can check whether the contents you solved during the game are correct.
・ You can redo the game from the beginning. Play time will also restart.
・At the beginning of the game for the first time, a tutorial on how to operate, rules and how to solve will be displayed.
You can see it at any time from the game screen.

To solve faster, it is important to solve common surrounding cells early.
* Sudoku is a registered trademark of Nikoli.