Logic Masters Deutschland e.V.

Click image to play in SudokuPad

Hello.

Standard Sudoku rules apply.

The Racetrack (Loop):

Draw a single closed loop representing the car’s path, viewed from above.

The car drives clockwise around the grid through cell centers and moves strictly orthogonally.

The path may touch itself orthogonally but must not cross or branch. Cages are obstacles which the car can never enter.

Driving Inputs:

The digit in any cell the loop passes through determines the car’s movement:

Odd digits (1,3,5,7,9): go straight.

Even digits (2,4,6,8): turn, using absolute numpad directions: 

2 → Up 

4 → Left

6 → Right

8 → Down

Box Balance:

In each 3×3 box, the sum of the odd digits on the loop equals the sum of the digits inside the cage(s) in that box. (multiple visits of the loop contribute to the same total.)

The loop must visit each region at least once !

A region without a cage indicates the sum of odd digits  for that region is zero.

Have fun.

Example of a loop with valid inputs: