Easy German Whispers Sudoku

Adjacent digits on green lines must differ by at least 5. The high–low alternation this forces shapes the entire solve.

Easy Medium Hard Expert

New to German Whispers Sudoku? Adjacent cells on green lines must differ by at least 5. The digit 5 is banned from all lines — start there.

5
2
9
7
1
8
1
9
4
1
5
2
3
2
8
5
1
4
7
1
6
5
1
9
6
4
2
1
1
8
5
9
3
7
9
3
6
4
Mistakes
0/3
Score
-
Time
00:00
Try Medium German Whispers →
Progress0%

What is German Whispers?

Difficulty
★★★★☆
4/5
Constraint Type
Line Constraints
Typical Givens
18–26
Avg. Solve (Easy)
10 min

Solving Techniques for Easy Level

Technique Description Level
High-Low Alternation Adjacent cells on the line must differ by ≥ 5. This forces a strict alternating high-low pattern: low (1–4) alternates with high (6–9). Beginner
Digit 5 Exclusion 5 cannot appear on any German Whispers line — no digit within 1–9 differs from 5 by at least 5. Eliminate 5 from all line cells immediately. Beginner

Ready to go deeper? Try Medium German Whispers to unlock Intermediate techniques.

Techniques to Master at Easy

  • Last Possible Number technique — No whisper cell can hold 5, and every line cell is locked to lows (1–4) or highs (6–9) by alternation — half the digits are gone before standard elimination begins.
  • Notes in Sudoku — Mark each line cell L or H before anything else; one resolved cell flips the entire line's alternation, instantly halving the notes of every cell on it.

Average Solve Time by Difficulty

Easy
10 min
Medium
22 min
Hard
44 min
Expert
74 min
Want a full walkthrough of rules, strategies, and solving steps? How to Play German Whispers →

Related Variants

Renban Sudoku

Both are coloured-line constraints — whispers force big jumps between neighbours while renban forces a tight consecutive set.

Between Lines Sudoku

Another line variant about value ranges: every line digit must fall strictly between the two circled endpoints.

Thermo Sudoku

If you like how whisper lines polarise digits into highs and lows, thermometers impose a full ordering along the line.

Frequently Asked Questions — Easy German Whispers Sudoku

What is German Whispers Sudoku?
German Whispers Sudoku adds green lines to a standard 9x9 Sudoku grid. Any two adjacent cells that share a green line must have digits that differ by at least 5. Standard Sudoku rules still apply — every row, column, and 3x3 box must contain 1 through 9 exactly once. The whisper constraint forces alternation between low (1-4) and high (6-9) digits along each line.
Why does the whisper rule force alternation between high and low digits?
If one cell on a green line contains 5, no adjacent cell on the line can satisfy the rule — 5 minus any digit from 1-9 is at most 4, never reaching the required difference of 5. So 5 is banned from all whisper lines. Every valid digit on the line is either in the low group (1, 2, 3, 4) or the high group (6, 7, 8, 9), and adjacent cells must always belong to opposite groups.
What digit is impossible on a German Whispers line?
The digit 5 can never appear on a German Whispers line. To satisfy a difference of at least 5 from 5, an adjacent cell would need a digit of 10 or higher (impossible) or 0 or lower (impossible). Eliminating 5 from every whisper-line cell immediately is one of the first and most powerful moves in any German Whispers puzzle.
How do I start solving an easy German Whispers Sudoku?
Begin by marking all whisper-line cells as unable to contain 5. Then for each cell on a line, determine whether it is in the low group or high group based on its neighbors. A cell adjacent to a known low digit must be in the high group (and vice versa). Short lines with few cells resolve very quickly using this alternation principle.
How is German Whispers Sudoku different from regular Sudoku?
Regular Sudoku gives you pre-filled digit clues. German Whispers Sudoku provides few givens but instead uses the line constraint to restrict the digit ranges that can appear in many cells. The lines act as a second layer of rules that often determines digit parity (high vs low) before you can pin down exact values.

More questions? See the full German Whispers Sudoku guide.