Logic Masters Deutschland e.V.

1.Divide the grid into orthogonally connected regions and write a number from 1 to 9 in each cell, such that every row, column and region contains every number from 1 to 9 exactly once;

2.Draw a white dot between all orthogonally adjacent cells of the same region that contain consecutive numbers. Some of these dots are already given;

3.Each given clue in the grid consists of two digits in ascending order. One digit corresponds to the number of cells plus the number of white dots seen in its row. The other digit corresponds to the number of cells plus the number of white dots seen in its column. The clue cell itself is included (in both counts). All possible white dots are counted, whether given or not. Region borders obstruct the view. Further, one of the digits of the clue must correspond to the digit in the cell with the clue;