German Whispers Sudoku
4
9
5
3
2
6
7
2
8
6
1
5
3
8
3
5
6
3
1
2
8
1
8
9
3
5
9
4
6
2
7
4
3
9
8
7
9
2
Fouten
0/3
Score
-
Tijd
00:00
Voortgang0%
Gemakkelijk · Duitse Fluisteringen
Wissel moeilijkheidsgraad hierboven ↑
Hoe German Whispers Sudoku te spelen
Standaard Sudoku-regels zijn van toepassing. Elke twee aangrenzende cellen langs een groene lijn moeten minstens 5 verschillen. Dit dwingt afwisseling tussen grote (6–9) en kleine (1–4) waarden af.
Volledige gids →
Aangrenzende cijfers op de groene lijn moeten ten minste 5 verschillen
German Whispers Gemakkelijk
German Whispers Gemiddeld
German Whispers Moeilijk
German Whispers Expert
Wat is German Whispers?
German Whispers (ook bekend als Whisper Sudoku) tekent groene lijnen op het rooster. Elke twee cijfers die aangrenzend zijn op de lijn moeten minstens 5 verschillen. Omdat het minimale verschil 5 is en cijfers variëren van 1–9, creëert dit een sterk afwisselend hoog-laag patroon: als een cel laag is (1–4), moet de volgende hoog zijn (6–9) en vice versa. De lijnbeperking elimineert 5 als geldig cijfer in de meeste posities.
In één oogopslag
| Beperkingstype | Lijnbeperkingen |
| Typische gegeven cijfers | 18–26 |
| Moeilijkheidsbeoordeling | ★★★★☆ 4/5 |
| Gem. oplossingstijd — Gemakkelijk | 10 min |
| Gem. oplossingstijd — Gemiddeld | 22 min |
| Gem. oplossingstijd — Moeilijk | 44 min |
| Gem. oplossingstijd — Expert | 74 min |
Hoe German Whispers op te lossen
| Techniek | Wat het doet | Niveau |
|---|---|---|
| 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 |
| Low-Set {1,2,3,4} / High-Set {6,7,8,9} | Every whisper cell belongs to one of these two sets. Apply row/column/box constraints within each set to narrow candidates. | Gevorderd |
| Endpoint Parity | The parity (high or low) of the line is not fixed — it's determined by surrounding constraints. Resolving one endpoint propagates the alternation inward. | Gevorderd |
Gemiddelde Oplossingstijden
Gemakkelijk
10 min
Gemiddeld
22 min
Moeilijk
44 min
Expert
74 min
Veelgestelde Vragen
Wat is German Whispers Sudoku?
German Whispers Sudoku is a variant where green lines are drawn across the grid. Any two cells adjacent along a green line must contain digits that differ by at least 5. Standard Sudoku rules apply — every row, column, and 3×3 box must contain 1–9 exactly once.
Why is it called German Whispers?
The name comes from the puzzle community and refers to a variant popularised in German puzzle circles, with 'whispers' evoking the idea of information passing along a line with a significant minimum separation at each step.
What digits can sit next to each other on a whisper line?
Only pairs with a difference of 5 or more: 1&6, 1&7, 1&8, 1&9, 2&7, 2&8, 2&9, 3&8, 3&9, 4&9. This means whisper cells must alternate between the low group (1–4) and high group (6–9). Digit 5 cannot appear on any whisper line.
What is the best first move in German Whispers Sudoku?
Identify the longest whisper lines and mark each cell as low (1–4) or high (6–9) based on alternation. Any whisper cell in a row, column, or box where the low or high group is almost fully placed gives you a direct elimination or placement.
Is German Whispers Sudoku hard to learn?
The constraint is simple to understand but its consequences take practice to apply automatically. The forced high-low alternation is the key insight — once you internalise it, you can immediately split each line cell into one of two groups and halve your candidate list from the start.
How long does German Whispers Sudoku take to solve?
Easy puzzles take 8–18 minutes. Medium puzzles run 18–35 minutes. Hard and expert puzzles can take 45 minutes to well over an hour. Longer whisper lines spanning the full grid are the most time-consuming because they interact with almost every row, column, and box simultaneously.