Logic Masters Deutschland e.V.

RULE SET:

Normal Sudoku rules apply. Place the digits 1 through 9 in each row, column, and box.

ANTI-KNIGHT: Cells separated by a knight’s move in chess cannot have the same digit.

GLOBAL MODULO-3. Every 2x2 square of cells must contain digits of residues modulo 3. One digit from (1,4,7), one from (2,5,8), and one from (3,6,9).

ENTROPIC (GREY): Any set of three sequential cells along a grey line must contain a low digit (1,2,3), middle digit (4,5,6) and high digit (7,8,9).

KROPKI: Cells separated by a white dot are consecutive. Not all dots are given.

XV PAIRS: Cells separated by a "X" must sum to 10, and cells separated by a "V" must sum to 5. Not all XV pairs are given.

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