Logic Masters Deutschland e.V.

Rules:

• In each column and region, the digits 0-9 appear exactly once each.
• In each row, a set of six different digits appear exactly once each. No two rows share a set of digits.
• The snowball regions (gray boxes) contain the same digits in the same arrangement plus or minus a constant value (which may differ per snowball region).
• The cells indicated with four diamonds do not contain digits one less than nor one greater than any orthogonally adjacent cell.
• The cells with shaded circles do not contain a 9.