Anti-Knight Sudoku
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6
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9
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5
9
1
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7
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9
1
4
7
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6
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7
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7
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2
8
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7
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9
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1
Erreurs
0/3
Score
-
Temps
00:00
Progrès0%
Facile · Sudoku Anti-Knight
Changez la difficulté ci-dessus ↑
Comment jouer au Sudoku Anti-Cavalier
Les règles standard du Sudoku s'appliquent. Règle supplémentaire : deux cellules accessibles par un mouvement de cavalier d'échecs (2+1 cases en forme de L) ne peuvent pas contenir le même chiffre. La contrainte est invisible — aucun marqueur sur le plateau — alors gardez-la à l'esprit en résolvant.
Guide complet →
Deux cellules séparées par un mouvement de cavalier ne peuvent pas contenir le même chiffre
Anti-Knight Sudoku Facile
Anti-Knight Sudoku Moyen
Anti-Knight Sudoku Difficile
Anti-Knight Sudoku Expert
Qu'est-ce que Anti-Knight Sudoku ?
L'Anti-Knight Sudoku étend le Sudoku avec une règle d'échecs : toutes deux cellules accessibles l'une de l'autre par un coup de cavalier d'échecs (2+1 cases en forme de L) ne peuvent pas partager le même chiffre. Chaque cellule a jusqu'à 8 voisins potentiels de coup de cavalier. Cela crée un riche réseau de contraintes qui est séparé et s'étend au-delà des règles standard de ligne/colonne/boîte.
En un coup d'œil
| Type de contrainte | Anti-Contraintes |
| Indices typiques | 20–26 |
| Évaluation de la difficulté | ★★★☆☆ 3/5 |
| Temps de résolution moyen — Facile | 5 min |
| Temps de résolution moyen — Moyen | 12 min |
| Temps de résolution moyen — Difficile | 24 min |
| Temps de résolution moyen — Expert | 45 min |
Comment résoudre Anti-Knight Sudoku
| Technique | Ce qu'il fait | Niveau |
|---|---|---|
| Knight-Zone Mapping | For each cell, mark all potential knight-move destinations (up to 8 cells). None may share the same digit as the source cell. | Avancé |
| Corner and Edge Advantage | Corner cells have only 2 knight-move neighbours; edge cells have at most 4. These restricted zones are easiest to resolve first. | Avancé |
| Knight Chains | Placing a digit can eliminate it from a chain of knight-move positions that span diagonally across the grid. | Avancé |
| Graph Coloring | Model the knight-move network as a graph and two-color it to find cells that cannot share a digit. | Avancé |
Temps de résolution moyens
Facile
5 min
Moyen
12 min
Difficile
24 min
Expert
45 min
Foire aux questions
Qu'est-ce que Anti-Knight Sudoku ?
Anti-Knight Sudoku is a variant where no two cells that are a chess knight's move apart may contain the same digit. A knight moves in an L-shape: two cells in one direction and one cell perpendicular. This adds a non-adjacent constraint that reaches across boxes and rows in ways standard Sudoku cannot.
How far does the anti-knight constraint reach?
A knight's move covers up to eight possible cells: two squares in any cardinal direction plus one square perpendicular. These eight cells can span across different rows, columns, and boxes — so the anti-knight constraint connects parts of the grid that standard Sudoku treats as independent.
Is Anti-Knight Sudoku harder than regular Sudoku?
Yes. The knight-move relationships are less intuitive than row/column/box constraints and require deliberate mapping. Easy puzzles are accessible once you visualise the knight's reach. Hard and expert puzzles use the constraint to create deductions that would be impossible without it.
What is the hardest part of Anti-Knight Sudoku?
Remembering that the constraint spans across boxes. It is easy to forget that placing a 5 in the top-left corner eliminates 5 from cells that are in a completely different box. Systematically checking all eight knight-reach cells after every placement is essential.
Can standard Sudoku techniques still be used?
Yes — all standard techniques apply, with the knight-move relationships treated as additional elimination links. Naked pairs and hidden singles can be found by treating any two knight-move-related cells as a pair subject to uniqueness.
How long does Anti-Knight 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 often exceed 90 minutes. The key to faster solving is visualising the full knight-reach pattern automatically after each placement.