Logic Masters Deutschland e.V.

Normal Sudoku rules apply [Place the digits 1-9 in every row, column, and 3x3 box]

Mod-3 Rows [Each row in the puzzle is a mod-3 line. Any set of three horizontally adjacent digits must contain one digit from (1,4,7), one digit from (2,5,8), and one digit from (3,6,9).]

159 [Digits in columns 1, 5, and 9 indicate the column in which the digits 1, 5, or 9 (respectively) appear in that row.]

Killer cages [Digits in cages sum to the number in the top right corner.]

You can play the puzzle here