Logic Masters Deutschland e.V.

9-steps Tutorial: Sandwich

Here is a tutorial sudoku teaching the sandwich constraint and aimed at first-timers. It is accessible, though not the easiest puzzle. When following the steps, it is build to showcase some common sandwich logic you will find in almost any sandwich sudoku there is! However, if you feel like it, or for more experienced solvers, feel free to solve it any way you like, there are no rules!

Rules: Normal sudoku rules. Clues outside the grid show the sum of digits sandwiched between the 1 and the 9 in that row or column.

Link: CtC app

Last puzzle in the serie: Renban