Logic Masters Deutschland e.V.

CTC:

Please evaluate the puzzle and leave feedback. This helps me construct better puzzles.

Standard Sudoku rules apply. Fill the grid so each row, column, and 3×3 box contains the digits 1–9 exactly once.

Region Sums: Region borders split the blue line into segments with equal digit sums.

Killer Cages: Digits in a cage sum to a given total and do not repeat.

Arrows: The digit in a circle equals the sum of the digits along its arrow. For clarity: two arrows from R6C6 overlap on three cells in box 9.

Quadruples: Digits shown in a circle must appear in the four surrounding cells.

You may also try this puzzle with a different logical twist at the link below.

CTC: