サーモ数独
2
6
9
4
5
4
1
2
5
6
7
8
7
9
8
6
2
7
8
5
3
6
2
1
7
3
9
1
8
8
9
2
1
3
4
1
5
6
サーモ数独の遊び方
標準数独ルールが適用されます。追加ルール: 各灰色の温度計に沿った数字は、球根（丸い端）から先端に向かって厳密に増加しなければなりません。3セルの温度計は2,5,8や1,4,9は可能ですが、3,3,7や5,4,8は不可。
完全ガイド →
Digits は thermometer shapes に沿って厳密に増加しなければなりません
サーモ数独とは？
Thermo Sudokuは、グリッド上に温度計の形状を重ねます。各温度計には一方の端にバルブ（円）、もう一方の端に先端があります。任意の温度計に沿った数字は、バルブから先端に向かって厳密に増加しなければなりません。標準の数独制約と組み合わせることで、強力な推論の連鎖が生まれます。バルブが少なくとも1で先端が最大9であることを知っていれば、その位置に基づいて温度計上の各セルの有効な値の範囲を計算できます。
概要
| 制約タイプ | ライン制約 |
| 典型的な初期数字 | 20–28 |
| 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 | 45分 |
| 平均解答時間 — エキスパート | 75分 |
サーモ数独 の解き方
| テクニック | それが何をするか | レベル |
|---|---|---|
| Range Restriction from Length | A thermometer with N cells must use N strictly increasing distinct values. The bulb is at least 1 and the tip is at most 9, giving a calculable valid range for each cell. | 上級 |
| Minimum/Maximum Bounding | The bulb value is ≤ 9 − (N − 1). The tip value is ≥ N. Apply these bounds immediately to prune all thermometer candidates. | 上級 |
| Overlapping Thermometer Deduction | Two thermometers sharing a cell give tighter combined bounds than either alone. | 上級 |
| Forcing Chains via Thermometers | When a value is forced into a thermometer cell, all cells closer to the bulb must be smaller and all closer to the tip must be larger. | 上級 |
| Short vs. Long Thermometers | A 2-cell thermometer is simply a greater-than relationship. A 9-cell thermometer forces exactly 1–9 in order. | 上級 |
平均解答時間
簡単
10分
ミディアム
22分
難しい
45分
エキスパート
75分
よくある質問
Thermo Sudokuとは何ですか？
Thermo Sudoku is a variant where thermometer shapes are drawn on the grid. Each thermometer has a bulb (rounded end) and extends through several cells toward a tip. The digits must strictly increase from the bulb to the tip — so every cell along a thermometer must hold a larger digit than the one before it.
温度計の手がかりをどのように読みますか？
The bulb is the starting point and must hold the smallest digit on that thermometer. Each subsequent cell must be strictly larger. For example, a 3-cell thermometer starting at the bulb means the bulb holds at most 7 (since two larger digits must follow). A 5-cell thermometer means the bulb holds at most 5.
Can digits repeat on a thermometer?
No. Because digits must strictly increase, no digit can appear twice on the same thermometer. A 4-cell thermometer uses four different increasing digits. Combined with standard Sudoku uniqueness rules, thermometers create very tight constraints on every cell they pass through.
Is Thermo Sudoku hard to learn?
The core rule is simple — digits increase from bulb to tip. Beginners can start solving after understanding just that one constraint. What makes higher difficulties challenging is tracking minimum and maximum values for each thermometer cell simultaneously across many overlapping thermometers.
What is the best first move in Thermo Sudoku?
Look for long thermometers. A 7-cell thermometer can only start at 1 and end at 7, 8, or 9 — drastically limiting all seven cells. Also check for thermometers where the bulb or tip overlaps with a constrained row, column, or box, as this often pins the starting digit immediately.
How long does Thermo Sudoku take to solve?
Easy puzzles take 8–15 minutes. Medium puzzles typically run 15–30 minutes. Hard puzzles average 35–60 minutes and expert puzzles can exceed 90 minutes. The difficulty scales sharply as thermometer lengths decrease and the number of simultaneously active constraints increases.