Logic Masters Deutschland e.V.

Battle for territory

Rules:

Standard placement: The digits from 1 to 8 are placed so that each appears exactly once in every row and every column.

Division into teams: The digits 1 to 8 are divided into two teams, with each digit assigned to exactly one team.

Unique regions: The final grid is fully partitioned into regions of orthogonally connected cells (a region may consist of a single cell). Each region is built from digits belonging to a single team, and orthogonally adjacent regions belong to opposite teams. Digits do not repeat within a region. All regions are unique in their composition of digits.

Region sums: A number clue gives the sum of all the digits in region. The sum clues are in an arbitrary position within the region. Each region has at most one clue, but may also have none at all.

Kropki: digits separated by a black dot have a ratio of 1:2; digits separated by a white dot are consecutive.

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