Logic Masters Deutschland e.V.

Rules:

Normal sudoku rules apply.

Double arrows: The sum of the digits along a grey line is equal to the sum of the digits in the circles at either end of the line.

Magic Square: Digits inside the cage form Magic Square. Magic Square must have the same sums of digits in each row, each column, and both main diagonals.

BitClocks: Each BitClock consists of an arrow cell and the four orthogonally adjacent cells surrounding it. The digit in the arrow cell encodes the parities (Odd/Even) of those four neighbouring cells.

Each digit corresponds to a specific 4-bit parity code, read left to right in the table below. The arrow points to the first bit of the code (read from left to right), and the code is applied clockwise around the four adjacent cells.

Example: If the arrow cell contains 3, its code is OOEE. Starting from the direction the arrow points and moving clockwise, the four neighbouring cells must be Odd, Odd, Even, Even.

Digit Codes:

1 → OOOE

2 → OOEO

3 → OOEE

4 → OEOO

5 → OEOE

6 → OEEO

7 → OEEE

8 → EOOO

9 → EOOE

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