Logic Masters Deutschland e.V.

Sudoku: The digits 1-9 must be placed in each row, column and box such that no digit repeats in any row, column, or box.

Thermo: Digits along a gray thermometer must increase from bulb to tip.

Dutch whisper lines: Two cells connected by an orange line must have a difference of at least 4.

Modular lines: Every group of 3 consecutive cells along a teal line must have a digit from each set of (1, 4, 7), (2, 5, 8), and (3, 6, 9).

White kropki dots: Digits connected by a white dot must be consecutive.

SudokuPad