Logic Masters Deutschland e.V.

Normal two-color Japanese sums rules apply. Colors used in this puzzle are red and green.

The clues outside the grid indicate the sums of the contiguous runs found in that row or column that must be shaded the color of the clue. If a clue is black, then both colors must be present in the row or column. There must be an unshaded cell between runs of the same color, though there is no need between runs of differing colors. If a row or column is unclued, there is no shading in that row or column.

Regions must be determined. cells within a region are either shaded or not, but not both.

There is a magic square hidden somewhere in the grid.

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