Logic Masters Deutschland e.V.

Fill each row, each column and each 3x3 box with the digits 0-8.

The digits in each cage sum to a prime number (2, 3, 5, 7, ...) but no two cages sum to the same prime.

All cages contain one and only one digit or pair of digits in adjacent cells left-to-right or top-to-bottom which hold the sum of the cage in base 9.

For example, if the cage starting in R2C1 sums to 47, then 47 is 52 base 9, because 47 divided by 9 is 5 with remainder 2. In this case, the digits 5-2 would appear once and only once in adjacent cells in the cage, either left-to-right or top-to-bottom.

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