A LITTLE FOCUS. A FRESH START.
Play German Whispers Sudoku
Play German Whispers Sudoku free online. Neighboring digits on green lines differ by at least five, creating high-and-low number patterns.
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LEARN THE TWIST
How to play German Whispers Sudoku
The difference rule applies to neighboring cells along the green path, not every pair of cells on it. Farther-apart digits may repeat if rows, columns, and boxes permit.
The rules
Fill each row, column, and 3×3 box with 1–9, without repeats. Neighbors along each green line differ by at least five. Digits farther apart on a line may repeat when ordinary rules allow it.
A useful first move
A 5 cannot appear on a multi-cell whispers line: no digit from 1–9 differs from it by five. Line neighbors alternate between low digits 1–4 and high digits 6–9.
A green-line step from 2 to 7 is valid because the difference is 5. A step from 4 to 8 is invalid because it differs by only 4. A 4 on a line can neighbor only 9.
SOLVE IT STEP BY STEP
Use the strongest neighbor first
Neighbors along a green Whispers line must differ by at least five. This splits the line into low and high digits, alternating at each step. Some digits are more restrictive than others: a 4 has only one possible line neighbor, while a 1 has four.
- Middle line cell
- 9
Check what can neighbor 4.
A neighbor must be at least five above or below 4. There is no digit five below 4 in 1–9, and the only digit at least five above it is 9.
Check the other end of the same cell.
The middle 9 also neighbors 2. Their difference is 7, so this second link accepts the placement.
Do not invent an extra link.
The 4 and 2 are two steps apart on the line. Their difference is only 2, but that is allowed: they are not consecutive neighbors along the path.
Alternate low and high candidates
Every line neighbor pair joins a low digit from 1–4 to a high digit from 6–9. The digit 5 cannot occur on a multi-cell line because no digit differs from it by five. Once you know which end is low, you can mark alternating low and high positions along the path, then narrow each position with its specific neighbors.
Common mistakes to avoid
- The difference may be greater than five; it does not need to equal five.
- The rule applies to consecutive cells on the line, not every pair. Non-neighboring line digits may repeat if ordinary Sudoku permits.
Try the reasoning yourself
Which digits can be next to 8 on a green line?
Show the answer and why
Only 1, 2, and 3. Their differences from 8 are 7, 6, and 5. A 4 is too close, and every higher digit is also too close.
Controls, difficulty, and saved games
Choose Beginner, Easy, Medium, Hard, or Expert above. Select an empty cell, then tap a number or use your keyboard. Notes let you pencil in candidates; three hints are available. Three mistakes end the puzzle.
Every mode and difficulty keeps a separate save in this browser. You can switch puzzles and return to your place. Clearing site data removes these saves; they do not sync with another device or the iPhone app. Settings include night mode and optional automatic cell advancement.
Correct entries earn points. High scores are stored by mode and difficulty and update only when beaten; completed-puzzle count and day streak are shared.
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