Logic Masters Deutschland e.V.

Normal sudoku rules apply.

A number in a grey cell X, is part of a string of numbers that is X cells long. The string forms a straight line going either horizontally or vertically. Each number in the string is consecutive with any number next to it in the string.

One such horizontal string that is just a subset of a longer such horizontal string does not create a grey cell. Likewise one such vertical string that is just a subset of a longer such vertical string does not create a grey cell.

A string consisting of just one number is valid.

All possible grey cells are given.

Example:

The puzzle:

solving online: penpa