Logic Masters Deutschland e.V.

Normal sudoku rules apply.

Most of the grid is covered in fog. Entering a correct digit clears fog in its cell and sometimes others'. No guessing is required.

Red shaded boxes are column indexers - a marked cell in column x indicates the column where the digit X goes, e.g. if r6c5 is a 1, r6c1 is a 5. Blue shaded boxes are row indexers - a marked cell in row x indicates the row where the digit X goes, e.g. if r5c4 is a 3, r3c4 is a 5.
Cells can be both column indexers and row indexers.

Adjacent digits along a green line differ by at least 5.

Digits separated by a white dot are
consecutive. One of the digits on a black dot is double the other.

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