ジャーマンウィスパーズ数独
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
ジャーマンウィスパーズ数独の遊び方
標準数独ルールが適用されます。緑の線に沿った隣接する2つのセルは、少なくとも5の差がなければなりません。これにより、大きい値（6～9）と小さい値（1～4）の交互配置が強制されます。
完全ガイド →
緑の線上の隣接する数字は、少なくとも5異なっていなければなりません。
ジャーマンウィスパーズとは？
ジャーマンホイスパー（ホイスパースドクとも呼ばれる）は、グリッド上に緑の線を描きます。線上で隣接する任意の2つの数字は、少なくとも5異なっていなければなりません。最小の差が5で数字が1～9の範囲であるため、これは強い高低交互パターンを作り出します：あるセルが低い（1～4）場合、次は高い（6～9）でなければならず、その逆も同様です。ライン制約により、ほとんどの位置で5が有効な数字として除外されます。
概要
| 制約タイプ | ライン制約 |
| 典型的な初期数字 | 18–26 |
| 難易度評価 | ★★★★☆ 4/5 |
| 平均解答時間 — 簡単 | 10分 |
| 平均解答時間 — ミディアム | 22分 |
| 平均解答時間 — 難しい | 44分 |
| 平均解答時間 — エキスパート | 74分 |
ジャーマンウィスパーズ の解き方
| テクニック | それが何をするか | レベル |
|---|---|---|
| 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). | 上級 |
| 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. | 上級 |
| 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. | 上級 |
| 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. | 上級 |
平均解答時間
簡単
10分
ミディアム
22分
難しい
44分
エキスパート
74分
よくある質問
German Whispers Sudokuとは何ですか？
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.