Logic Masters Deutschland e.V.

Play in SudokuPad

Sudoku: Place the digits 1-9 once in every row, column and irregular shaped box.

Starbattle: Two of the digits act like stars: they cannot touch each other (or themselves), even diagonally. Which of the two digits act like starts, needs to be deduced.

3-Dimensional-Sum-Sandwich: The digit (or sum of digits) sandwiched between two stars (horizontally, vertically or diagonally!) have to be divisible (without a remainder) by the sum of the sandwiching stars.

Palindrome: digits on a grey line read the same forwards and backwards.

Austrian whisper: Adjacent digits on a red-white-red line must differ by at least 2.

Here is an example where the digits 1 and 2 act like stars: digits (and sum of digits) sandwiched horizontally or vertically are divisible by 3. Digits (and sum of digits) sandwiched diagonally are divisible by 2, 3, or 4, depending on the value of the sandwiching stars.