Logic Masters Deutschland e.V.

Normal sudoku rules apply.

Yin-Yang. Colour all cells in the grid blue or orange such that all blue cells are orthogonally connected and all orange cells are orthogonally connected. No 2x2 area consists of all blue or all orange cells. Four orange cells are given and the sum of all blue cells is 94.

Parity. Adjacent digits on red lines must have different parities (odd vs. even).

Fog. The grid is mostly covered by fog. Correctly placing digits may reveal additional clues.

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