Sudoku-6up

Size:

6x6.

Elements:

1, 2, 3, 4, 5, and 6.

Groups: Eighteen total.

The 6 rows.

The 6 columns.

The 6 2x3 rectangles.

Instructions:

Precise details on group numbering.

Answer grids:

There are 28,200,960 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
Easy	3	4	Puzzle   ·   3-steps   ·   All-steps   ·   Solution grid
Medium	5	6	Puzzle   ·   3-steps   ·   All-steps   ·   Solution grid
Difficult	7	11	Puzzle   ·   3-steps   ·   All-steps   ·   Solution grid