Logic Masters Deutschland e.V.

Fog of war: The grid is partially covered in fog. Placing correct digits may clear the fog from parts of the grid.

Normal sudoku rules apply.

Modified index lines.
All lines are modified index lines. Each has a rank N (a positive integer) that must be deduced. Different lines may have different ranks.

Position 1 is the start of the line, and is marked by a square. If no square is given, the start must be deduced.

The value of a cell is V = D + k × N, where D is the digit in the cell and k is the number of earlier cells on the line (counting from position 1) that contain the same digit.

The VALUES along a line must form a standard index line: if the value in position X is Y, then the value in position Y is X.

Example: with N = 3, the digits 1, 2, 3, 1 give the values 1, 2, 3, 4, which is a valid index line. With N = 2, the digits 2, 1, 2, 3 give the values 2, 1, 4, 3, which is also valid.

In addition, each line fulfils another standard condition for its DIGITS:

• Green, German whisper: adjacent digits differ by at least 5.
• Orange, Dutch whisper: adjacent digits differ by at least 4.
• Red, parity: adjacent digits alternate between odd and even.
• Grey, palindrome: the digits read the same from either end of the line.
• Blue, region sum: the box borders divide the line into segments. The digits in each segment have the same sum.

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