Arrow Sudoku
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Erros
0/3
Pontuação
-
Tempo
00:00
Progresso0%
Fácil · Arrow Sudoku
Muda a dificuldade acima ↑
Como jogar Arrow Sudoku
As regras padrão do Sudoku aplicam-se. Regra extra: os dígitos ao longo da cauda de cada seta devem somar o dígito no círculo na base da seta. O círculo em si é uma célula normal de Sudoku — o seu valor determina a soma que as células da seta devem ter.
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Os dígitos numa seta devem somar o dígito no círculo
Arrow Sudoku Fácil
Arrow Sudoku Médio
Arrow Sudoku Difícil
Arrow Sudoku Especialista
O que é Arrow Sudoku?
Arrow Sudoku coloca setas na grelha, cada uma começando numa célula circulada. Os dígitos em todas as células ao longo da seta (não incluindo o círculo) devem somar o dígito colocado na célula circulada. Como o dígito máximo é 9, setas longas com muitas células são altamente restritas. Arrow Sudoku combina-se frequentemente de forma bela com a eliminação padrão e a lógica de candidatos.
À Primeira Vista
| Tipo de restrição | Restrições de Linha |
| Pistas típicas | 20–26 |
| Classificação de dificuldade | ★★★★☆ 4/5 |
| Tempo médio de resolução — Fácil | 12 min |
| Tempo médio de resolução — Médio | 25 min |
| Tempo médio de resolução — Difícil | 50 min |
| Tempo médio de resolução — Especialista | 80 min |
Como resolver Arrow Sudoku
| Técnica | O que faz | Nível |
|---|---|---|
| Arrow Sum Bounding | The circle digit equals the sum of all arrow shaft cells. A 3-cell arrow with circle 5 means the three shaft cells average under 2 — severely constraining options. | Avançado |
| Max/Min Arrow Analysis | The maximum sum of N cells is 9+8+7+…; the minimum is 1+2+3+…. If the circle digit falls outside these bounds, a constraint error exists. | Avançado |
| Bifurcation on Short Arrows | For 2-cell arrows with a small circle (e.g., 3), only (1,2) or (2,1) works — enumerate cases to find forced placements quickly. | Avançado |
| Arrow–Region Interaction | Arrow cells sharing a box or row with the circle create indirect constraints — combine the sum equation with standard Sudoku uniqueness. | Avançado |
| Repeating Digits on Arrows | Arrow shaft cells can repeat digits (unlike Killer cages). Factor this in when enumerating possible sums. | Avançado |
Tempos Médios de Resolução
Fácil
12 min
Médio
25 min
Difícil
50 min
Especialista
80 min
Perguntas Frequentes
O que é o Arrow Sudoku?
Arrow Sudoku is a variant where arrows are drawn across the grid. Every digit placed along an arrow must sum to the number written inside the circle at the arrow's base. Standard Sudoku rules still apply — every row, column, and 3×3 box must contain the digits 1–9 exactly once.
How do the arrows and circles work?
Each arrow starts at a circle and extends through one or more cells. The digit in the circle is the target sum for all cells the arrow passes through. A single-cell arrow tells you the exact digit in that cell. Longer arrows have multiple possible combinations, which you narrow down using Sudoku constraints.
Is Arrow Sudoku harder than regular Sudoku?
It depends on your experience. Arrow Sudoku adds an arithmetic layer on top of standard logic. Easy puzzles are comparable in difficulty to medium classic Sudoku. Hard and expert arrow puzzles require simultaneous constraint-tracking that most players find significantly more challenging than any classic Sudoku difficulty.
Can a digit repeat along an arrow?
No — digits can repeat on an arrow only if standard Sudoku rules allow it. Because each row, column, and box must contain 1–9 once, a digit can appear twice on an arrow only if the two cells are in different rows, columns, and boxes. In practice, most arrow cells are highly constrained.
What is the best first move in Arrow Sudoku?
Start with single-cell arrows — the digit in that cell equals the circle value directly. Then look for short arrows with extreme sums. A 2-cell arrow summing to 3 can only be {1,2}; summing to 17 can only be {8,9}. These give you the tightest starting constraints without any guessing.
How long does Arrow Sudoku take to solve?
Easy puzzles take 5–15 minutes. Medium puzzles typically run 15–30 minutes. Hard puzzles average 30–60 minutes, and expert puzzles can take over an hour even for experienced solvers. Solve times improve quickly once you develop intuition for which arrow combinations are possible at a glance.