Here’s today’s free sudoku printable. This is a 9×9 puzzle and medium difficulty with a space theme.
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Sudoku Instructions
Objective:
Fill in the grid so that every row, column, and 4×4 sub grid contains the symbols 1 through 9 exactly once.
Rules:
- Each row must contain all symbols 1–9, without repetition.
- Each column must contain all symbols 1–9, without repetition.
- Each 3×3 subgrid must contain all symbols 1–9, without repetition.
How to Solve:
- Start with the clues – Look for rows, columns, or subgrids missing only a few symbols.
- Use elimination – If a symbol already appears in a row, column, or subgrid, it can’t be used again there.
- Find single options – If a symbol can fit in only one cell within a row, column, or subgrid, place it there.
- Recheck often – Each number placed gives new information for the rest of the grid.
- Use pencil marks – Write small notes of possible symbols in empty cells, then narrow them down as you go.
- Watch for patterns – Look for unique symbol groups or repeating positions that can help identify correct placements.
Solution
