Expert Palindrome Sudoku
Les chiffres le long de chaque ligne marquée se lisent de la même manière dans les deux sens. Chaque palindrome reflète sa propre logique.
Expert Sudoku Palindrome. Les puzzles les plus difficiles du site — des réseaux de palindromes denses où chaque placement nécessite un raisonnement multi-étapes précis.
2
4
1
7
4
6
3
7
5
6
2
4
6
3
8
5
4
3
6
1
2
7
7
Qu'est-ce que Sudoku Palindrome ?
Difficulté
★★★☆☆
3/5
Type de contrainte
Contraintes de ligne
Indices typiques
20–28
Moy. Résolution (Expert)
58 min
Techniques de résolution pour le niveau Expert
| Technique | Description | Niveau |
|---|---|---|
| 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. | Débutant |
| 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. | Débutant |
| Mirror Propagation | Once one cell of a mirror pair is determined, immediately set its partner to the same value. | Intermédiaire |
| Multi-Palindrome Intersection | If two palindromes share a cell, that cell must satisfy both palindrome relationships simultaneously. | Avancé |
Techniques à maîtriser au niveau Expert
- Technique X-Wing — Expert palindrome endgames chain mirror-imported eliminations into fish: prune through the mirrors first, then the X-Wing geometry appears two boxes away.
- Swordfish technique — Long mirrored lines synchronise candidate patterns between far-apart rows, exactly the repetition a Swordfish needs — expert grids are constructed around this echo.
Temps de résolution moyen par difficulté
Facile
7 min
Moyen
16 min
Difficile
32 min
Expert
58 min
Envie d'un guide complet des règles, stratégies et étapes de résolution ?
Comment jouer à Sudoku Palindrome →
Variantes connexes
Sudoku Renban
Both put structure on a drawn line's digit set — renban demands a consecutive run where palindromes demand mirror symmetry.
German Whispers
Trades mirrored repetition for forced separation: adjacent line digits must differ by 5 or more.
Between Lines Sudoku
Endpoint-anchored lines where position on the line carries meaning, just as it does for palindrome mirror pairs.
Foire aux questions — Expert Sudoku Palindrome
Plus de questions ? Voir la Guide du Sudoku Palindrome.