Thermo Sudoku
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Facile · Sudoku Thermo
Changez la difficulté ci-dessus ↑
Comment jouer au Sudoku Thermo
Les règles standard du Sudoku s'appliquent. Règle supplémentaire : les chiffres le long de chaque thermomètre gris doivent strictement augmenter du bulbe (extrémité cercle) à la pointe. Un thermo de 3 cellules pourrait être 2,5,8 ou 1,4,9 mais pas 3,3,7 ou 5,4,8.
Guide complet →
Les chiffres doivent strictement augmenter le long des formes de thermomètre
Thermo Sudoku Facile
Thermo Sudoku Moyen
Thermo Sudoku Difficile
Thermo Sudoku Expert
Qu'est-ce que Thermo Sudoku ?
Thermo Sudoku superpose des formes de thermomètre sur la grille. Chaque thermomètre a un bulb (cercle) à une extrémité et un tip à l'autre. Les digits le long de tout thermomètre doivent strictement augmenter du bulb au tip. Combiné avec les contraintes standard du Sudoku, cela crée de puissantes chaînes de déductions — sachant que le bulb est au moins 1 et le tip au plus 9, vous pouvez calculer la plage de valeurs valides pour chaque cell sur le thermomètre en fonction de sa position.
En un coup d'œil
| Type de contrainte | Contraintes de ligne |
| Indices typiques | 20–28 |
| Évaluation de la difficulté | ★★★★☆ 4/5 |
| Temps de résolution moyen — Facile | 10 min |
| Temps de résolution moyen — Moyen | 22 min |
| Temps de résolution moyen — Difficile | 45 min |
| Temps de résolution moyen — Expert | 75 min |
Comment résoudre Thermo Sudoku
| Technique | Ce qu'il fait | Niveau |
|---|---|---|
| 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. | Avancé |
| Minimum/Maximum Bounding | The bulb value is ≤ 9 − (N − 1). The tip value is ≥ N. Apply these bounds immediately to prune all thermometer candidates. | Avancé |
| Overlapping Thermometer Deduction | Two thermometers sharing a cell give tighter combined bounds than either alone. | Avancé |
| 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. | Avancé |
| Short vs. Long Thermometers | A 2-cell thermometer is simply a greater-than relationship. A 9-cell thermometer forces exactly 1–9 in order. | Avancé |
Temps de résolution moyens
Facile
10 min
Moyen
22 min
Difficile
45 min
Expert
75 min
Foire aux questions
Qu'est-ce que Thermo Sudoku ?
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.
Comment lire les indices du thermomètre ?
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.