THE PLAYBOOK · 850305
How to play Sandwich Sudoku
For Sandwich Sudoku, 850305 puts the actual rules alongside the playable board or activity. Solve the Sudoku while each outside clue gives the sum strictly between 1 and 9 in that row or column. The suggested practice focus is observe, then act.
8 finite checked puzzles, with local saved progress. No claim of unlimited daily puzzles or calibrated difficulty.
Observe, then act
Look at the full play area and read the status message. Make a deliberate choice and compare the outcome with your expectation.
Your goal
Solve the Sudoku while each outside clue gives the sum strictly between 1 and 9 in that row or column.
Step by step
- Select an editable cell.
- Enter a value using the keypad or keyboard; Notes stores candidates.
- Read the region, cage, arrow or outside clues alongside the normal constraints.
- Check entries verifies the completed board; Undo reverses your last input.
- New puzzle selects another included puzzle.
Controls
Click or tap cells and the digit pad. Use Notes, Undo and Reveal selected. Large boards scroll inside the game.
A useful example
If the values strictly between 1 and 9 are 2, 4 and 7, the sandwich clue is 13.
Watch out for this
A full board must obey every extra rule. Reveal supplies assistance; it is not an earned deduction.
Common questions
What is included in this edition?
8 finite checked puzzles, with local saved progress. No claim of unlimited daily puzzles or calibrated difficulty.
Which controls should I use?
Click or tap cells and the digit pad. Use Notes, Undo and Reveal selected. Large boards scroll inside the game.
Can you show a concrete example?
If the values strictly between 1 and 9 are 2, 4 and 7, the sandwich clue is 13.
