Expert Thermo Sudoku
Cijfers moeten toenemen van het bolletje naar de punt langs elke thermometer. Temperatuurrichting beperkt elke plaatsing.
Expert Thermo Sudoku. De moeilijkste thermometerpuzzels op de site — elke plaatsing volgt uit precieze grenscalculaties en logische redenering.
2
4
3
7
2
6
1
9
4
5
1
3
1
8
5
6
3
6
9
3
8
7
9
3
2
Wat is Thermo Sudoku?
Moeilijkheidsgraad
★★★★☆
4/5
Beperkingstype
Lijnbeperkingen
Typische Gegeven Cijfers
20–28
Gem. Oplossing (Expert)
75 min
Oplostechnieken voor Expert Niveau
| Techniek | Beschrijving | 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. | Beginner |
| Minimum/Maximum Bounding | The bulb value is ≤ 9 − (N − 1). The tip value is ≥ N. Apply these bounds immediately to prune all thermometer candidates. | Beginner |
| Overlapping Thermometer Deduction | Two thermometers sharing a cell give tighter combined bounds than either alone. | Gemiddeld |
| 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. | Gevorderd |
| Short vs. Long Thermometers | A 2-cell thermometer is simply a greater-than relationship. A 9-cell thermometer forces exactly 1–9 in order. | Gemiddeld |
Technieken om te beheersen op Expert
- X-Wing-techniek — Expert thermo endgames run on the extremes: thermometers force 8s and 9s away from tips of short lines, leaving textbook two-per-row X-Wing geometry.
- Swordfish technique — When several long thermometers parallel each other, mid-range digits get confined to the same three columns across three rows — exactly the Swordfish setup expert grids exploit.
Gemiddelde Oplossingstijd per Moeilijkheidsgraad
Gemakkelijk
10 min
Gemiddeld
22 min
Moeilijk
45 min
Expert
75 min
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Gerelateerde Varianten
Pijl Sudoku
Thermo and Arrow both constrain digits along drawn lines — increase swaps for summation, but the cell-by-cell bounding feels the same.
German Whispers
Another drawn-line rule: instead of strictly increasing, neighbouring line digits must differ by at least 5.
Renban Sudoku
Line cells must form a consecutive set rather than an increasing one — the same range-tracking instinct, loosened by one degree.
Veelgestelde Vragen — Expert Thermo Sudoku
Meer vragen? Zie de volledige Thermo Sudoku gids.