Logic Masters Deutschland e.V.

In this variant, you'll need to solve 4 puzzles, increasing in size and difficulty. Every layer adds a new (standard) constraint, which applies to each larger grid too. You'll need to reuse some of the digits from each solution, and clear the rest, so I included images for the smaller puzzles for those who still solve on paper.


1) Consider the 3x3 region in the center of the grid as a separate puzzle.

Place the numbers 1-3 exactly once in every row and column.
Maximum cell: The value in the grey cell is higher than its four orthogonal neighbours.
German Whispers: Adjacent digits along the marked lines have a difference of at least 2.

Keep the numbers that match their row number (1 from the first row, 2 from the second row, 3 from the third row). Remove the rest of the digits and zoom out.

Focus mode: F-puzzles | CTC App


2) Now consider the 5x5 region in the center of the grid as a separate puzzle.

Place the numbers 1-5 exactly once in every row and column.
Maximum cell rule still applies.
German Whispers now have a difference of at least 3.
Kropki: The two cells connected by a dot contain consecutive numbers.

Keep the numbers that match their row number (1 from the first row, 2 from the second row, ..., 5 from the fifth row). Remove the rest of the digits and zoom out.

Focus mode: F-puzzles | CTC App


3) Now consider the 7x7 region in the center of the grid as a separate puzzle.

Place the numbers 1-7 exactly once in every row and column.
Maximum cell, Kropki rules still apply.
German Whispers now have a difference of at least 4.
Anti-king: The same digit can not appear in diagonally adjacent cells.

Keep the numbers that match their row number. Remove the rest of the digits and zoom out.

Focus mode: F-puzzles | CTC App


4) Now you can solve the 9x9 puzzle.

Place the numbers 1-9 exactly once in every row, column and 3x3 box.
Maximum cell, Kropki, Anti-king rules still apply.
German Whispers now have a difference of at least 5.
Killer: The sum of numbers in each cage is equal to the number in the upper left corner of the cage.







If you are solving online, you'll find links for each layer in focus if needed, but you could just start on the 9x9 grid and solve the whole puzzle there. I recommend darkening the non-relevant cells while solving the smaller puzzles, and disabling conflict highlighting until you get to the 9x9.

F-puzzles: https://f-puzzles.com/?id=2dtauy96

CTC App: https://tinyurl.com/25rpv4mj


Have fun!

matyas