Sudoku Saboteur

Fill the grid so every row, column, and box holds 1-9, but first root out the fake givens. You win only when the grid is solved and every trap is flagged.

• A few givens are saboteur traps that break the logic
• Flagging a clue removes it from the puzzle
• Use pencil notes to track candidates

• Desktop: keys 1-9 to fill, arrow keys to move, Backspace to clear, F or right-click to flag a trap
• Phone & tablet: on-screen number pad plus Fill, Notes, and Flag-Trap mode buttons

• Easy, Medium, and Hard difficulties
• Daily seeded puzzle or Practice

• If a region can't be solved, suspect a fake clue and test-flag it
• Use notes to expose contradictions a trap creates
• Confirm the real givens before committing big chains of digits

Sudoku — originally published as Number Place — is a number-placement puzzle whose entire contract is that the givens are true and the answer is unique.

This breaks the contract on purpose: some givens are fakes, and you win only when the grid is solved and every trap is flagged.

That turns a closed-form puzzle into a hypothesis-testing one. In real sudoku a contradiction means you made an error; here it means a given is lying, so the skill is holding a tentative grid in mind long enough to work out which assumption has to go.

Sudoku Saboteur layers a hidden-information deduction twist over classic number-logic puzzles. Free to play in your browser on PlayPendium.

A free, original browser game on PlayPendium. No download, no install.