THE PLAYBOOK · SZHLJS
How to play Sandwich Sudoku
The SZHLJS guide to Sandwich Sudoku starts with rules before speed. Your task is to solve the Sudoku while each outside clue gives the sum strictly between 1 and 9 in that row or column. The controls and example below describe this exact implementation.
8 finite checked puzzles, with local saved progress. No claim of unlimited daily puzzles or calibrated difficulty.
Rules before speed
Work slowly for one round. Explain the rule behind each choice before trying to improve your score or completion time.
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
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.
What is included in this edition?
8 finite checked puzzles, with local saved progress. No claim of unlimited daily puzzles or calibrated difficulty.
