Anti-Rei Sudoku
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Pontuação
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Tempo
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Progresso0%
Fácil · Anti-Rei Sudoku
Muda a dificuldade acima ↑
Como jogar Anti-King Sudoku
As regras padrão do Sudoku aplicam-se. Regra adicional: duas células diagonalmente adjacentes (ou ortogonalmente adjacentes) não podem partilhar o mesmo dígito. Um rei num tabuleiro de xadrez pode alcançar todas as 8 células circundantes — nenhuma dessas células pode partilhar um dígito.
Guia completo →
Duas células separadas por um movimento de rei não podem conter o mesmo dígito
Anti-Rei Sudoku Fácil
Anti-Rei Sudoku Médio
Anti-Rei Sudoku Difícil
Anti-Rei Sudoku Especialista
O que é Anti-Rei Sudoku?
O Anti-King Sudoku adiciona uma restrição inspirada no xadrez: células que seriam alcançáveis num único movimento de rei (ortogonal ou diagonalmente adjacentes) não podem partilhar o mesmo dígito. Isto estende a regra de não repetição para além de linhas, colunas e caixas para incluir vizinhos diagonais, apertando significativamente o espaço de restrições em toda a grelha.
À Primeira Vista
| Tipo de restrição | Anti-Restrições |
| Pistas típicas | 22–28 |
| Classificação de dificuldade | ★★★☆☆ 3/5 |
| Tempo médio de resolução — Fácil | 5 min |
| Tempo médio de resolução — Médio | 13 min |
| Tempo médio de resolução — Difícil | 26 min |
| Tempo médio de resolução — Especialista | 48 min |
Como resolver Anti-Rei Sudoku
| Técnica | O que faz | Nível |
|---|---|---|
| Diagonal Exclusion | The king constraint extends the exclusion zone to all 8 neighbours including diagonals. Apply diagonal exclusions before standard row/col/box logic. | Avançado |
| Corner Restriction | Corner cells (e.g., r1c1) only have 3 king-move neighbours. Start with corners and edges to build initial placements. | Avançado |
| King-Chain Elimination | When a digit is placed, eliminate it simultaneously from all 8 surrounding cells. | Avançado |
| Parity via King's Move | In Anti-King, consecutive digits often become mutually king-move incompatible — trace valid placement paths using this property. | Avançado |
Tempos Médios de Resolução
Fácil
5 min
Médio
13 min
Difícil
26 min
Especialista
48 min
Perguntas Frequentes
O que é o Anti-King Sudoku?
Anti-King Sudoku is a variant where no two diagonally adjacent cells may contain the same digit. Combined with standard Sudoku rules (which already forbid matching digits in the same row, column, and box), this means a digit cannot appear in any of the eight cells surrounding a given cell.
Why is it called Anti-King?
The name comes from chess: a king can move to any of the eight adjacent squares (horizontally, vertically, or diagonally). The Anti-King constraint says no digit may be repeated within a king's move of any placed digit — it's the opposite of the king's reach being unrestricted.
How many cells does the anti-king constraint affect?
Each interior cell has eight neighbours (up to eight for corner and edge cells). All eight must hold different digits from the placed cell, on top of the standard uniqueness rules. Cells in the top-left to bottom-right diagonal neighbourhood are constrained in ways that standard Sudoku doesn't cover.
Is Anti-King Sudoku harder than regular Sudoku?
Easy Anti-King puzzles resolve faster than classic Sudoku because the extra diagonal constraint eliminates more candidates. Hard and expert puzzles compensate with fewer givens, and the diagonal interactions create subtle deduction chains that can be difficult to spot.
What is the best first move in Anti-King Sudoku?
Focus on corner cells first — they have the fewest anti-king neighbours (only 3 for a true corner). Then look at cells near already-placed digits and check how many of the eight neighbours already have that digit. Dense clustering of given digits often creates immediate anti-king placements.
How long does Anti-King Sudoku take to solve?
Easy puzzles take 6–15 minutes. Medium puzzles run 15–30 minutes. Hard puzzles average 30–60 minutes and expert puzzles can take 60–90 minutes. The diagonal constraint makes early progress fast but creates subtle interactions in the middle and end game.