Logic Masters Deutschland e.V.

• Irregular 10-sudoku rules apply: place the digits 0 to 9 once each in every row, column and region.
• The grid is toroidal: each edge of the grid is considered to be adjacent/orthogonal to its opposite edge. (Lines, regions and chess knight moves wrap around opposite sides of the grid.)
• Cells one chess knight's move apart may not contain the same digit.
• Digits joined by a black dot are in 1:2 ratio and digits joined by a white dot are consecutive. Not all possible dots are given.
• Grey lines are palindromes: their digits read the same in either direction.

Online in Sudokupad

See also:

• on elliptic hyperboles
• homotopically 3/4
• suprematic isotopy 3/5
• the three utilities problem