Logic Masters Deutschland e.V.

Play on SudokuPad!

Normal sudoku rules apply.

Pivot Loop: Form a one-cell-wide loop that moves through the grid orthogonally. The loop does not touch itself, not even diagonally. A loop cell is an odd digit if the loop moves straight through it, and is an even digit if the loop does a 90 degree turn at its location.

Loop Mod 3 Arrows: A digit on an arrow indicates how many digits in the arrow’s direction, including itself, have the same remainder modulo 3 as that digit. A digit on an arrow also indicates how many loop cells are in the arrow’s direction, including the cell containing the digit.

Loop Dots: Cells separated by a black or white dot are either both loop cells, or neither are loop cells. Digits separated by a black dot have a 1:2 ratio. Digits separated by a white dot are consecutive.



Example of a valid loop shape (the white cells inside the loop cannot be cut off from each other, and a 2x2 block of cells cannot all be loop cells):



(Puzzles throughout this series use the same loop rules, and visually identical elements have the same meaning).