TicTac-DEF Thumbnail of a TicTac-DEF puzzle.

Size:
3x3.
Elements:
D, E, and F.
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 LevelLowHighExample
Easiest 2 2 Puzzle   ·   3-steps   ·   All-steps   ·   Solution grid