Logic Masters Deutschland e.V.

Rules:

Normal Sudoku: Fill the grid with digits 1–9 such that every row, column, and 3 by 3 box contains each digit exactly once.

Counting Circles: If a circle contains a digit N, then there are exactly N circles in the entire grid that contain that digit.

Region Division: The entire grid must be divided into non-overlapping, orthogonally connected regions. Every cell in the grid must belong to exactly one region, and each region must contain exactly one colored circle.

Region Size: A digit N inside a circle dictates the exact number of cells in the region containing that circle.

Boundary Kropki Dots: A white dot separates two consecutive digits and acts as a region boundary. (Not all dots are given)

Circle Color Properties: The color of a circle dictates both the shape of its region and the repetition of digits within it:
​Blue Circles: The region must be a rectangle, and digits cannot repeat.
​Yellow Circles: The region must NOT be rectangular, and digits cannot repeat.
​Red Circles: The region must NOT be rectangular, and it must contain at least one repeated digit.

​Equal Region Sums: If two regions have the same size, the sum of all digits within those regions must be equal.

Solve on Sudokupad