Logic Masters Deutschland e.V.

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Rules

Normal Sudoku: Digits do not repeat in any row, column, or outlined region.

Sum cages: The digits in each cage sum to the clue in its corner.

Math cages: Apply the operation shown in the corner to the digits to obtain the clue. For subtraction, subtract all other digits from the largest digit.

Cage repetition: Digits may repeat within sum cages and math cages, provided the normal Sudoku rules are respected.

Thermometers: Digits strictly increase from the bulb to the tip.

Arrows: The digit in a circle equals the sum of the digits along its arrow. Digits may repeat along an arrow.

White dots: Connected digits differ by exactly 1.

Black dots: Connected digits are in a 1:2 ratio.

X clues: Connected digits sum to 10.

Green lines: Adjacent digits along a green line differ by at least 5.

Red lines: Adjacent digits along an orange line differ by at least 3.

Fog of War: Entering a correct digit reveals its cell and the eight surrounding cells. Clues hidden under the fog become visible when their cells are revealed.

You may enter a digit under the fog when it is logically determined from the visible clues and normal Sudoku rules.

Feedback on the difficulty, logical progression, and interactions between clues is very welcome.

Enjoy solving!