Logic Masters Deutschland e.V.

Play this Sudoku on Zinga

Normal Sudoku rules apply.

Row 2 contains a thermometer. Digits along the thermometer must increase from the bulb.

Row 3 contains a liar sum arrow. The encircled two-digit number is 1 away from the sum of the digits along the arrow.

Row 4 has a liar skyscraper sum. The sum of the visible digits is 1 away from the indicated sum. A digit is “visible” if it is not obstructed by a larger digit as seen from the clue.

Row 5 has a liar X-sum. The sum of the first X digits, where X is the first digit, is 1 away from the indicated sum.

Row 9 has a liar killer cage. The sum of the digits is 1 away from the indicated sum.

Column 9 has a liar sandwich. The sum of the digits between the 1 and 9 in this column is 1 away from the indicated sum.

The big 6×6 box is a Binairo cage: (1) there are no three even digits or three odd digits back-to-back (horizontally or vertically) within the cage; (2) each row and each column within the cage contains the same number of odd and even digits; (3) the rows within the cage have unique arrangements of odd/even digits, and the same is separately true of the columns within the cage.

The circle is a Renban ring. The eight digits along the ring are unique and are missing either the 1 or the 9.

The black-and-white squares are Battenburg clues. The four surrounding squares contain two odd and two even digits in a checkerboard pattern.

The greater-than sign in column 2 points at the smaller of the two digits.

Enjoy!