THE PLAYBOOK · DOORSL
Sandwich Sudoku: rules and examples
Take a moment with Sandwich Sudoku before moving to another game. Solve the Sudoku while each outside clue gives the sum strictly between 1 and 9 in that row or column. Choose a clear next step rather than rushing through the instructions. Compare the starting position with the example in the Guide. Use the example below to understand a decision.
This collection contains 8 puzzles. Progress is saved in this browser. The same puzzle can appear again; the collection is not labelled with calibrated difficulty levels.
A small practice goal
When a decision goes wrong, compare it with the common mistake described below. Start again only when you intend to leave the current round. Use the example to check your reasoning.
What you need to achieve
Solve the Sudoku while each outside clue gives the sum strictly between 1 and 9 in that row or column. Keep that objective in view throughout the round. Start with a deliberate move.
Work through the instructions
- 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.
Your inputs
Click or tap cells and the digit pad. Use Notes, Undo and Reveal selected. Large boards scroll inside the game. A careful first action helps you become familiar with the layout. Look at the feedback after the action.
One way to understand the rules
If the values strictly between 1 and 9 are 2, 4 and 7, the sandwich clue is 13. Use the example as a guide rather than a substitute for reading your board. Choose a deliberate next step.
Notice this detail
A full board must obey every extra rule. Reveal supplies assistance; it is not an earned deduction. Read the feedback to see why an action did not have the expected result. Keep the stated aim separate from side details such as animation or appearance. Progress is measured by the game’s own completion or scoring rules.
Game-specific help
On this playing page, what is the goal of Sandwich Sudoku?
Keep this in mind: Solve the Sudoku while each outside clue gives the sum strictly between 1 and 9 in that row or column.
When I return, how do I control Sandwich Sudoku?
Keep this in mind: Click or tap cells and the digit pad. Use Notes, Undo and Reveal selected. Large boards scroll inside the game.
As a new player, what example helps explain Sandwich Sudoku?
If the values strictly between 1 and 9 are 2, 4 and 7, the sandwich clue is 13.
While learning, what should I watch out for in Sandwich Sudoku?
Here is the relevant explanation: A full board must obey every extra rule. Reveal supplies assistance; it is not an earned deduction.
While reading the Guide, what format does Sandwich Sudoku offer?
This collection contains 8 puzzles. Progress is saved in this browser. The same puzzle can appear again; the collection is not labelled with calibrated difficulty levels.
While learning, which play mode does Sandwich Sudoku use?
For clarity: The mode on this page is Solo. Same-device play uses one screen; this game library does not provide internet matchmaking.