Sudoku Palindromo
8
2
3
1
4
1
5
5
4
9
7
6
7
2
2
1
7
9
9
5
1
8
2
7
9
4
5
6
4
1
2
8
6
2
7
1
9
4
Errori
0/3
Punteggio
-
Tempo
00:00
Progresso0%
Facile · Palindrome Sudoku
Cambia difficoltà sopra ↑
Come giocare a Palindrome Sudoku
Si applicano le regole standard del Sudoku. Ogni linea grigia è un palindromo - La sequenza di cifre si legge allo stesso modo da entrambe le estremità. Per una linea di 5 celle che legge 3,7,5,7,3, posizione 1 = posizione 5 e posizione 2 = posizione 4.
Guida completa →
La sequenza di cifre lungo una linea si legge allo stesso modo in avanti e all'indietro
Sudoku Palindromo Facile
Sudoku Palindromo Medio
Sudoku Palindromo Difficile
Sudoku Palindromo Esperto
Cos'è Sudoku Palindromo?
Palindrome Sudoku segna linee sulla griglia la cui sequenza di cifre deve essere un palindromo — leggendo lo stesso in entrambe le direzioni. Se una linea ha celle A-B-C-D-E, allora A=E e B=D, mentre C è la cifra centrale. Questo crea coppie di celle che devono condividere lo stesso valore, agendo come potenti vincoli di uguaglianza attraverso la griglia.
A Colpo d'Occhio
| Tipo di vincolo | Vincoli di Linea |
| Dati tipici | 20–28 |
| Valutazione della difficoltà | ★★★☆☆ 3/5 |
| Tempo medio di risoluzione — Facile | 7 min |
| Tempo medio di risoluzione — Medio | 16 min |
| Tempo medio di risoluzione — Difficile | 32 min |
| Tempo medio di risoluzione — Esperto | 58 min |
Come Risolvere Sudoku Palindromo
| Tecnica | Cosa fa | Livello |
|---|---|---|
| Mirror Pair Identification | In a palindrome of length L, cell i and cell L+1−i must share the same digit. Identify all mirror pairs before solving. | Avanzato |
| Centre Cell Freedom | The central cell of an odd-length palindrome has no mirror constraint — it is only restricted by standard row/column/box rules. | Avanzato |
| Mirror Propagation | Once one cell of a mirror pair is determined, immediately set its partner to the same value. | Avanzato |
| Multi-Palindrome Intersection | If two palindromes share a cell, that cell must satisfy both palindrome relationships simultaneously. | Avanzato |
Tempi Medi di Risoluzione
Facile
7 min
Medio
16 min
Difficile
32 min
Esperto
58 min
Domande Frequenti
Cos'è il Palindrome Sudoku?
Palindrome Sudoku is a variant where grey lines are drawn across the grid. Every grey line must read the same forwards and backwards — meaning the first cell mirrors the last, the second mirrors the second-to-last, and so on. Standard Sudoku rules apply throughout.
How does the palindrome constraint work?
For any palindrome line, cell positions are mirrored around the centre. On a 6-cell line, cells 1 and 6 hold the same digit, cells 2 and 5 hold the same digit, and cells 3 and 4 hold the same digit. This immediately links distant parts of the grid — placing a digit at one end fixes the digit at the other end.
Can palindrome lines have repeated digits?
Yes, palindrome lines inherently require digit repetition — each mirrored pair shares the same digit. However, standard Sudoku rules still apply, so a repeated digit must be in different rows, columns, and boxes. Palindrome lines are carefully constructed so that this repetition is always consistent with uniqueness rules.
Is Palindrome Sudoku harder than regular Sudoku?
Easy palindrome puzzles are often easier than classic Sudoku because the mirroring immediately links cells across the board, providing extra deductions. Harder difficulties become quite challenging because you must track mirrored constraints across long lines while maintaining standard Sudoku logic.
What is the best first move in Palindrome Sudoku?
Find palindrome lines where one endpoint cell is already constrained by its row, column, or box. Placing a digit there immediately fixes the mirrored cell at the other end. Also look for odd-length lines — the centre cell has no mirror partner, so it's only constrained by standard Sudoku rules.
How long does Palindrome Sudoku take to solve?
Easy puzzles take 8–15 minutes. Medium puzzles run 15–30 minutes. Hard puzzles average 30–60 minutes and expert puzzles often exceed 90 minutes. The difficulty increases sharply when multiple long palindrome lines overlap across the same region of the grid.