Logic Masters Deutschland e.V.

Rules:

Place the digits 0 to 9 once each in every row, column, and 3x3 box. To fit 10 digits in 9 cells, one cell must be a Schrodinger cell (i.e. it contains two digits). There can only be one Schrodinger cell in each row, column, and 3x3 box. The value of a cell is the sum of the digits in that cell.

Blue rectangles are Binary Cages. Take the value of the first cell in the cage (read from left to right or top to bottom) and translate it into binary. The 0s and 1s of the binary set the parity for the values of the cells in the cage. A 0 in the binary means the value of the cell is even, a binary 1 means the cell's value is odd. For example, if the value of the first cell in a 3-cell cage is 5, then all three cells in the cage must be odd because 5 in binary is 111. A 4-cell cage with the first cell value of 11 would be odd-even-odd-odd because the binary of 11 is 1011. There are plenty of online resources that show you a list of numbers and their binary translation if you would like to use them.

Green arrows are summation arrows. The values of the cells along the arrow sum to the value in the circle.

Black dots indicate that the two connected cells have values that are in a 1:2 ratio.

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