Logic Masters Deutschland e.V.

Welcome to the Cryptos. A tuace in-house production.

In all puzzles of this series - except for the finale, where sometimes other rules may apply - each crypto letter represents a digit from 0 to 9, same cryptos the same digit, different ones different. In some episodes of the series, this range of values is restricted; this is pointed out separately, but only if absolutely necessary. If the cryptos represents a multi-digit number, the first crypto must not take the value 0.

The value assignment of the letters of this puzzle is needed for the season finale. There the values can be entered in a table.


Mathrax: Enter digits from 1 to 8 in the grid so that each digit appears exactly once in each row and in each column. Some grid points contain clues consisting of a number and an arithmetic operator. The clue number is equal to the result of the operator applied to two diagonally opposite adjacent digits and must apply to both such pairs of digits. If a grid point is marked E ("even") or O ("odd"), the four adjacent digits must all be even or odd, respectively.

Besides the cryptos, question marks also occur here. Each question mark can be replaced either by any digit (for two-digit numbers the first question mark cannot be replaced by a 0), or by an E or O.