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

Loop Thermometers: Digits along a thermometer ascend from the bulb. 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.

Loop Summit Lines: Digits along a blue line must be ascending or descending, with 1 and 9 reversing the ascension/descension. A digit in a circle indicates how many loop cells are on the attached blue line.

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 have the same loop rules, and visually identical elements have the same meaning).