Logic Masters Deutschland e.V.

• Normal sudoku rules apply.
• A cell with a circle has a digit that indicates how many times that digit appears in circles.
• Digits joined by a black dot are in a 1:2 ratio.
• Digits in cells with circles are never in a 1:2 ratio with the digits in any cell that shares an edge with them.

Online in Sudokupad

See also:

• ball pit at the bounce house with Calvinball
• yo tenía diez perritos
• watskeburt
• flash in the extancy
• C-C-C-C-Cheese Time
• Dutch Flat Mates: Dual Duel