TicTac-MNO

Size:

3x3.

Elements:

M, N, and O.

Groups: Six total.

The 3 rows.

The 3 columns.

Instructions:

Precise details on group numbering.

Answer grids:

There are 12 answer grids,

(including all possible symetrically equivalent grids)

Puzzle Difficulty levels and Examples

Difficulty Level	Low	High	Example
Easiest	2	2	Puzzle   ·   3-steps   ·   All-steps   ·   Solution grid