Logic Masters Deutschland e.V.

Normal Sudoku rules: Place the numbers one to nine once each in each row column and box.

Renban: Purple lines are renban lines. They contain consecutive groups of digits with no repeats.

Nabner: Gold lines are Nabner lines they contain non-consecituve groups of digits with no repeats.

Positive Circles: Purple Circles are positive circles. A digit in a positive circle says how many of that digit are circled in the puzzle.

Negative Circles: Gold circles are negative circles. A digit in a negative circle says how many of that digit are NOT circled in the puzzle.

Play on Sudoku pad