Logic Masters Deutschland e.V.

Standard Sudoku: each row, column, and 3×3 box contains digits 1–9 once

Quadruples: Every digit in a white circle has to be assigned to one of the surrounding cells

Renban line: Digits on each continuous segment form a set of consecutive numbers in any order. Each segment CAN NOT contain less than 3 cells

Saboteurs : 4 hidden cells contain exactly four distinct odd digits. These cells are intruders to the Renban line; whenever one appears, it splits the line into two segments and is excluded from the Renban structure, saboteur cells are not adjacent on the line and their locations are to be deduced by the solver.

Killer cage: cage sums to a given total

German whispers: adjacent digits on the line differ by ≥5.

Palindromes: sequence reads the same forward and backward on a gray line

Minimum clue: cell is less than the orthogonal digits around

Kropki dots: white = consecutive cells , black = 1:2 relation

Shapes: Circle = odd, Square = Even

Solve here