Logic Masters Deutschland e.V.

Normal and Diagonal Sudoku rules apply. Each row, column, 3x3 box and the negative diagonal (from top left to bottom right) contains each number from 1 to 9 exactly once.

The grey lines are palindromes: they are sequences of digits which read the same backward as forward (for example: 1374731).

The white dots represent a difference of 1 between two neighbouring cells. All possible white dots are indicated.

The puzzle is also available online.