Normal sudoku rules apply. The grid is covered in fog. Placing correct digits reveals clues in the surrounding 3x3 area. No guessing is required. Shade some cells so that all shaded cells are orthogonally connected and all unshaded cells are orthogonally connected. No 2x2 area can be completely shaded or unshaded. The value of a shaded cell is the sum of its row number and its column number. The value of an unshaded cell is its digit. Values an equal distance to the circled cente of a line sum to the central value. All lines are of odd length, only move orthogonally and don't share cells with other lines.