Logic Masters Deutschland e.V.

Draw a closed loop going through the centers of diagonally or orthogonally adjacent cells. It cannot turn more than 45 degrees in a cell (that is, if it enters from below, it can exit top, top left, or top right). The loop does not intersect with itself. Every even digit rests on the loop, but not every digit on the loop is necessarily even. The loop passes through no Kropki dots, but may pass through touching cells.

The dots are Kropki dots. Between black Kropki dots, one digit is double the other. Between white Kropki dots, the digits are consecutive. Not all dots are necessarily given.

Normal sudoku rules also apply (fill each cell with a digit 1-9. Digits cannot repeat in a row, column, or 3x3 region).

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