Logic Masters Deutschland e.V.

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This puzzle is part of my snackdoku series. Snackdokus are sudoku puzzles that are generally smaller (4x4 grid) and simpler to solve. If you are an experienced solver, you will likely be done in hardly 30 seconds to 1 minute. Good practice even if you are newer to the hobby!

Rules:

• Normal 4x4 sudoku rules apply. Place the digits 1-4 in each row, column, and 2x2 box without repetition.
• Anti-Knight: Cells that are a knight's move apart (in chess) may not contain the same digit.
• Arrows: Digits on an arrow must sum to the digit placed in that arrow's circle.
• X-Sums: A number outside the grid gives the sum of the first N digits in that row or column, where N is the digit in the cell closest to the given clue.

Solve on SudokuPad here!

To increase accessibility to my puzzles, I include hints in my puzzle posts (see below). I also post solution videos on my Patreon and YouTube channel. Puzzles released prior to February 2026, as well as my snackdoku and variant sudoku 101 series will continue to get public solution videos on YouTube, while others will be Patreon-exclusive.

Hint: The X-Sum clue is where to start. R1C1 can only be 1 number to allow the clue to work. After that, the anti-knight constraint will be your best friend.