Logic Masters Deutschland e.V.

Normal Sudoku rules apply.

Fog: The grid is covered in fog. Correctly placed digits will clear fog from their cells and may clear fog from other cells. Guessing is not required.

Greater Than Symbols: A greater-than symbol points toward the smaller digit.

Parity: Digits in cells marked with squares of the same color share the same parity.

One Max: There is exactly one cell in the grid that contains a digit larger than all of its (up to 8) neighboring cells.

Ranked Quads: Each 2×2 area of the grid is read in western reading order to form a four-digit number, giving a total of 64 such numbers. Circles in the center of a 2×2 area show its rank among all 64 numbers, where 1 is the smallest and 64 is the largest. White circles show the true rank, while black circles show an incorrect rank. All four-digit numbers are different, so there are no tied ranks.

Letters: Each of the letters A,B,C,D,E,F,G represents a digit from 0-9. All instances of the same letter represent the same digit, and different letters may represent the same digit. Two-digit numbers may not have a leading zero. It is known that C = B + 7.