Logic Masters Deutschland e.V.

Normal sudoku rules apply.

Yin Yang: Shade some cells in the grid such that all shaded cells are orthogonally connected, all unshaded cells are orthogonally connected, and no 2x2 region is entirely shaded or unshaded.

Copycat: Shaded cells are Copycat cells. The value of a Copycat cell is the digit in the cell located rotationally opposite it in the grid. For example, if R1C3 was shaded and R9C7 contained a 7, then the value of R1C3 would be 7 (regardless of the digit placed in R1C3). For clarity, the value of an unshaded cell is its digit.

No shaded cell contains a digit equal to its value.

Kropki: Cells separated by a black dot contain values where one is double the other. Cells separated by a white dot contain consecutive values.

Killer: Digits in a cage do not repeat (but values may). Values in a cage sum to the total in the top-left corner of the cage.

Circles: The value of a circled cell is the number of cells of the same shading as itself that can be 'seen' in all orthogonal directions (including the circled cell), where cells of the opposite shading block vision.

Solve on SudokuPad

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