Non-Consecutive Sudoku
4
8
5
2
7
6
7
1
9
8
2
6
8
7
2
6
6
7
2
1
8
5
4
9
7
1
5
8
7
4
9
2
8
7
7
6
4
2
Errori
0/3
Punteggio
-
Tempo
00:00
Progresso0%
Facile · Non-Consecutive Sudoku
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Come giocare a Non-Consecutive Sudoku
Si applicano le regole standard del Sudoku. Regola extra: due celle ortogonalmente adiacenti (che condividono un bordo) non possono contenere cifre consecutive. Se una cella contiene 5, tutti e quattro i vicini devono evitare 4 e 6.
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Nessuna due celle ortogonalmente adiacenti possono contenere cifre consecutive
Non-Consecutive Sudoku Facile
Non-Consecutive Sudoku Medio
Non-Consecutive Sudoku Difficile
Non-Consecutive Sudoku Esperto
Cos'è Non-Consecutive Sudoku?
Non-Consecutive Sudoku impone un vincolo globale: nessuna due celle che condividono un lato (ortogonalmente adiacenti) può contenere cifre consecutive. Quindi se una cella contiene 5, tutti i suoi vicini devono evitare 4 e 6. Questa singola regola limita drasticamente le possibili posizioni dei candidati e può ridurre il numero di cifre date standard pur producendo un puzzle risolvibile in modo unico.
A Colpo d'Occhio
| Tipo di vincolo | Anti-Vincoli |
| Dati tipici | 18–24 |
| Valutazione della difficoltà | ★★★☆☆ 3/5 |
| Tempo medio di risoluzione — Facile | 5 min |
| Tempo medio di risoluzione — Medio | 13 min |
| Tempo medio di risoluzione — Difficile | 26 min |
| Tempo medio di risoluzione — Esperto | 48 min |
Come Risolvere Non-Consecutive Sudoku
| Tecnica | Cosa fa | Livello |
|---|---|---|
| Global Candidate Pruning | For every filled cell, remove its ±1 neighbours from all orthogonally adjacent cells immediately. | Avanzato |
| Digit 5 is Most Constrained | 5 cannot be adjacent to 4 or 6. Use this to restrict placement of 5 across the entire grid. | Avanzato |
| Chain Propagation | Placing a digit propagates constraints along rows and columns, often triggering a cascade of forced placements. | Avanzato |
| Forbidden Pair Maps | Build a map of forbidden digit pairs for each adjacent pair of cells and use it to eliminate candidates systematically. | Avanzato |
Tempi Medi di Risoluzione
Facile
5 min
Medio
13 min
Difficile
26 min
Esperto
48 min
Domande Frequenti
Cos'è il Non-Consecutive Sudoku?
Non-Consecutive Sudoku is a variant where no two horizontally or vertically adjacent cells may contain consecutive digits. There are no markers on the grid — the non-consecutive rule applies globally to every pair of neighbours. Standard Sudoku rules also apply.
How does the global non-consecutive rule constrain the grid?
Every pair of adjacent cells cannot differ by exactly 1. This means you cannot place a 4 next to a 3 or a 5. For every digit you place, you must eliminate that digit ±1 from all orthogonal neighbours. This propagates eliminations across the entire board immediately after every placement.
Which digits are most affected by the non-consecutive rule?
Digits 1 and 9 can only be invalid next to 2 and 8 respectively — so they are least affected. Digit 5 cannot be adjacent to either 4 or 6, which is a moderate restriction. Digits 4, 5, and 6 are most affected because they are adjacent to two common digit pairs simultaneously.
Il Non-Consecutive Sudoku è più difficile del Sudoku regolare?
Yes, typically. The global constraint eliminates many more candidates than standard rules alone. Easy puzzles are accessible and resolve quickly. Hard and expert puzzles compensate with fewer given digits, making the non-consecutive constraint the primary source of all deductions.
What is the best first strategy for Non-Consecutive Sudoku?
After placing each digit, immediately mark all orthogonal neighbours as unable to hold ±1. Scan rows and columns for digits that can now only go in one cell due to these combined eliminations. Digit 5 is particularly useful as a placement anchor — wherever 5 is placed, both 4 and 6 are eliminated from all four neighbours.
How long does Non-Consecutive Sudoku take to solve?
Easy puzzles take 5–15 minutes. Medium puzzles run 15–30 minutes. Hard puzzles average 30–55 minutes and expert puzzles can take 60–90 minutes. Non-Consecutive Sudoku rewards players who apply the constraint globally and systematically after every move.