Sudoku-7-X Thumbnail of a Sudoku-7-X puzzle.

Size:
7x7.
Elements:
1, 2, 3, 4, 5, 6, and 7.
Groups: Twenty-three total.
The 7 rows.
The 7 columns.
The 7 septominos.
The 2 diagonals.
Instructions:
Precise details on group numbering.
Answer grids:
There are no possible answer grids or puzzles for this puzzle definition.

Puzzle Difficulty levels and Examples

Difficulty LevelLowHighExample
Easiest 2 2
Easy 3 4
Medium 5 8
Difficult 9 12
Challenging 13 14