Logic Masters Deutschland e.V.

Rules:

Normal sudoku rules apply. Place the digits 1 through 9 in every row, column, and 3x3 box exactly once.

Identical digits do not appear in cells that are a king’s move or an “extended knight’s move” apart.

An “extended knight’s move” is defined to be 3 steps vertically and one step horizontally, or 3 steps horizontally and one step vertically.

Clues outside the grid give the sum of the indicated diagonal.

Every set of three sequential cells on the thin gray line must contain one low digit (1,2,3), one medium digit (4,5,6), and one high digit (7,8,9).

The thick gray lines are palindromes, i.e. The digit on these lines read the same forwards and backwards.

You can play this puzzle at the following link!

CTC