Logic Masters Deutschland e.V.

Click image to play in SudokuPad

Hello.

Standard Sudoku rules apply. 

The nine regions of the grid are irregular and orthogonally connected. Their shapes are not given and must be deduced by the solver.

A digit in an arrow cell equals the number of cells in its row OR column that are outside its region. The solver determines which (row or column).

One arrow, inside the grey square, instead counts the number of cells in its own region in the row or column, including itself.

Digits connected by a black dot have a 2:1 ratio.

Digits on an orange line must differ by at least 4.

BitClocks: An arrow cell and its 4 orthogonal neighbours belong to the SAME region.

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
  (Odd digits = OFF/O) (Even digits = ON/E)

2 → OOEO


3 → OOEE


4 → OEOO


5 → OEOE


6 → OEEO


7 → OEEE


8 → EOOO


9 → EOOE

Have fun.