Logic Masters Deutschland e.V.

The first puzzle with this ruleset can be found here. Ever since that puzzle's debut, I have been revisiting the ruleset every few months to try to find something smoother—and finally found it! Difficulty estimated at 3.5 stars if you have some experience with basic Coral/Yin-Yang logic.

Rules:

Normal Sudoku rules apply.

Coral Variant: Some cells are coral and others are water. The odd digits are all part of the coral. All coral cells are orthogonally connected. The even digits are all part of the water. There may be multiple bodies of water, and all bodies of water are orthogonally connected to the edge of the grid. No 2x2 area is entirely coral or entirely water.

Equal Sum Cages: Within each cage, digits cannot repeat, and the sum of the odd digits equals the sum of the even digits.

Solve Online:

• SudokuPad