Logic Masters Deutschland e.V.

RULES:

• Place the digits 1-4 exactly TWICE each into every row and column.
• Digits must not repeat within each 2x2 box.
• Digits in a cage cannot repeat and must sum to the given value.
• The four cells which do not belong to any cage also do not contain a repeated digit.
• Digits joined by a black dot have the ratio 1:2. Digits joined by a white dot are consecutive. Not all possible dots are given.

LINKS:

Play on SudokuPad

Hope you enjoy.