Sandwich Sudoku

Sandwich Sudoku. Clue numbers outside a row or column give the sum of digits "sandwiched" between the 1 and the 9.

How to play

Fill the 9×9 grid so every row, every column, and every 3×3 box contains the digits 1 to 9 with no repeats — the classic Sudoku rule. Sandwich Sudoku adds one twist: Clue numbers outside a row or column give the sum of digits "sandwiched" between the 1 and the 9.

Every Sandwich Sudoku puzzle is free to play in your browser — no ads, no sign-up, and it works offline.