Logic Masters Deutschland e.V.

A New Secret

• Place the digits 0-8 once each in every row, column, and box of the grid. The cell with the grey circle is odd and the cell with the grey square is even, zeros are even.
• Shade some cells in the grid such that all instances of the shaded and all instances of the unshaded cells are orthogonally connected, and no 2x2 area is completely shaded or unshaded. (Yin Yang)
• Shaded cells count as negative for box sums and cage totals. A zero can't be negative and is never shaded.
• A box sum is the sum of all of the digits within a box, all box sums are zero. Digits within a cage sum to the clue in the top left corner of the cage.

Play with sudokupad

Have fun and leave a comment if you enjoyed it!