Between Lines Sudoku
4
6
9
1
4
7
5
7
9
1
3
2
6
1
5
4
3
1
6
9
7
1
6
4
3
3
5
8
4
7
1
5
7
8
6
8
7
3
Virheet
0/3
Pisteet
-
Aika
00:00
Edistyminen0%
Helppo · viivojen välissä
Vaihda vaikeustasoa ylhäältä ↑
Kuinka pelata Between Lines -Sudokua
Tavalliset sudokusäännöt pätevät. Jokaisella viivalla on kaksi ympyrän päätepistettä. Kaikkien viivan numeroiden (lukuun ottamatta ympyröitä) täytyy olla tiukasti kahden päätearvon välissä.
Täydellinen opas →
Viivalla olevien numeroiden on oltava tiukasti kahden päätepistearvon välissä
Between Lines Sudoku Helppo
Between Lines Sudoku Keskitaso
Between Lines Sudoku Vaikea
Between Lines Sudoku Asiantuntija
Mikä on Between Lines Sudoku?
Between Lines Sudoku piirtää viivoja, joissa on pyöreät päätepisteet. Jokaisen viivan varrella olevan numeron (pois lukien itse päätepisteet) on oltava tiukasti suurempi kuin pienempi päätepiste ja tiukasti pienempi kuin suurempi päätepiste. Jos päätepisteet ovat 2 ja 8, jokaisen viivan keskimmäisen solun on oltava yksi luvuista 3, 4, 5, 6 tai 7. Mitä lähempänä päätepisteet ovat arvoltaan, sitä rajoitetumpia keskimmäiset solut ovat.
Yhdellä silmäyksellä
| Rajoitetyyppi | Viivarajoitteet |
| tyypilliset aloitusluvut | 20–28 |
| Vaikeustasoarvio | ★★★☆☆ 3/5 |
| Keskim. ratkaisuaika — Helppo | 8 min |
| Keskim. ratkaisuaika — Keskitaso | 18 min |
| Keskim. ratkaisuaika — Vaikea | 36 min |
| Keskim. ratkaisuaika — Asiantuntija | 64 min |
Kuinka ratkaista Between Lines Sudoku
| Tekniikka | Mitä se tekee | Taso |
|---|---|---|
| Endpoint Gap Analysis | The gap between endpoint values must be large enough to accommodate all middle cells. If endpoints are 2 and 8, middle cells must come from {3,4,5,6,7}. | Edistynyt |
| Endpoint Ordering | The endpoint values have no fixed order — the constraint is that all middle cells are strictly between the minimum and maximum endpoint. | Edistynyt |
| Tight Endpoint Constraint | If endpoints would be consecutive (e.g., 3 and 4), no middle cell could satisfy the strict inequalities — use this to force endpoints apart. | Edistynyt |
| Between-Line–Box Interaction | All middle cells sharing a box must satisfy the between constraint. Use the box to eliminate candidates outside the valid range. | Edistynyt |
Keskimääräiset ratkaisuajat
Helppo
8 min
Keskitaso
18 min
Vaikea
36 min
Asiantuntija
64 min
Usein kysytyt kysymykset
Mitä on Between Lines Sudoku?
Between Lines Sudoku is a variant where lines with circular endpoints are drawn on the grid. Every digit along a line (excluding the endpoint circles) must be strictly between the two endpoint values. The endpoints themselves are placed during solving — only the line positions are given.
How do I read the between-line clues?
The two circles at the ends of each line are the boundary values. Every cell between them must be strictly greater than the smaller endpoint and strictly less than the larger one. You deduce which endpoint is larger as part of the solve.
Can the endpoints be any digits?
Yes. Endpoint circles are not pre-filled — you place digits in them during solving. The only rule is that every cell along the line (excluding endpoints) must sit strictly between whatever ends up in the two circles.
What is the best strategy for Between Lines Sudoku?
Look for short between-lines — a single cell between two endpoints is tightly constrained. Combined with row, column, and box rules, the valid range for that cell is often very small. Also look for lines where available candidates in a given row or column form a narrow range.
Is Between Lines Sudoku hard to learn?
The concept is straightforward but the deductions require careful range analysis. Tracking the minimum and maximum possible values for each endpoint and inferring the valid range for in-between cells is the core skill. Easy puzzles make this very accessible.
How long does Between Lines Sudoku take to solve?
Easy puzzles take 8–18 minutes. Medium puzzles run 18–35 minutes. Hard puzzles average 35–65 minutes and expert puzzles can take over 90 minutes. Solve time scales with the number of overlapping lines and the complexity of range interactions.