Logic Masters Deutschland e.V.

Play on SudokuPad!

Normal sudoku rules apply.

Parity 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 Dutch Whispers: The loop first encounters an orange line containing one loop cell, then an orange line containing two loop cells, then three, then four, and back to one. Adjacent digits along an orange line differ by at least 4.

Loop Thermometers: If a cell on a thermometer is a loop cell, then every cell on that thermometer with a higher digit than it is also a loop cell. Digits along a thermometer ascend from the bulb.

Loop Arrows: A digit on an arrow indicates how many loop cells are in the direction of the arrow, not counting the arrow cell.

Loop Dots: Cells separated by a white dot are either both loop cells, or neither are loop cells. 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).