Sudoku Externo
72
39
85
94
15
87
56
13
74
76
19
32
34
29
15
98
61
32
6
3
5
1
1
4
6
3
2
3
5
4
1
9
7
4
7
9
5
8
3
5
2
4
8
9
9
7
5
3
2
6
6
1
9
8
2
1
14
32
76
25
46
79
23
85
91
63
54
12
21
97
53
89
47
16
Erros
0/3
Pontuação
-
Tempo
00:00
Progresso0%
Fácil · Outside Sudoku
Muda a dificuldade acima ↑
Como jogar Outside Sudoku
As regras padrão do Sudoku aplicam-se. Cada dígito mostrado fora da grelha deve aparecer nas primeiras três células dessa linha ou coluna (o bloco 3x3 mais próximo). As pistas azuis à esquerda/direita referem-se às primeiras/últimas três células dessa linha; as pistas azuis no topo/fundo referem-se às primeiras/últimas três células dessa coluna.
Guia completo →
Os dígitos fora da grelha devem aparecer nas primeiras três células dessa linha ou coluna
Sudoku Externo Fácil
Sudoku Externo Médio
Sudoku Externo Difícil
Sudoku Externo Especialista
O que é Sudoku Externo?
O Sudoku Externo coloca dígitos nas margens da grelha. Cada dígito externo deve aparecer numa das três primeiras células (a caixa mais próxima) da linha ou coluna para a qual aponta. Nenhum dígito dado padrão é fornecido dentro da grelha — todas as pistas vêm das margens. Isto cria uma forma invulgar de Sudoku onde as restrições iniciais vêm inteiramente de fora da grelha.
À Primeira Vista
| Tipo de restrição | Pistas Externas |
| Pistas típicas | 28–36 given + 4×9 outside clues |
| Classificação de dificuldade | ★★★☆☆ 3/5 |
| Tempo médio de resolução — Fácil | 8 min |
| Tempo médio de resolução — Médio | 18 min |
| Tempo médio de resolução — Difícil | 36 min |
| Tempo médio de resolução — Especialista | 65 min |
Como resolver Sudoku Externo
| Técnica | O que faz | Nível |
|---|---|---|
| Clue-Zone Mapping | Each outside digit must appear in the nearest 3 cells of its row or column. Map all outside clues to their zones immediately. | Avançado |
| Cross-Side Reasoning | If left clue digit X must be in cols 1–3, and right clue digit X is in the same row, that row already places X — the other side confirms its column. | Avançado |
| Box-Side Interaction | An outside clue for a row interacts with the box containing cols 1–3. If the row's box is heavily constrained, the outside digit's position may be forced. | Avançado |
| Digit Elimination from Clues | When a clue digit is placed in the zone, eliminate it from the rest of the zone row/col using standard Sudoku logic. | Avançado |
| Dual-Side Chains | Combine left and right clues for the same row: both digits restrict the same three columns from opposite ends, leaving the middle box fully determined. | Avançado |
Tempos Médios de Resolução
Fácil
8 min
Médio
18 min
Difícil
36 min
Especialista
65 min
Perguntas Frequentes
O que é o Outside Sudoku?
Outside Sudoku is a variant where digits appear outside the grid's borders, one or more per row and per column. Each outside digit must appear somewhere within the first three cells of the row or column it points into (the nearest three to that outside clue). Standard Sudoku rules apply throughout.
How far into the grid do outside clues reach?
Each outside clue constrains only the first three cells of its row or column — the three cells nearest to where the clue is placed. A clue on the left side of row 5 means that digit must be in column 1, 2, or 3 of row 5. A clue on the top of column 4 means that digit must be in row 1, 2, or 3 of column 4.
Can an outside digit appear in any of the three cells?
Yes — the clue only guarantees the digit is somewhere in those first three cells, not which one. When multiple outside clues constrain the same three-cell window, their interactions can pin specific cells very precisely. Cross-referencing horizontal and vertical outside clues is the primary solving technique.
Is Outside Sudoku hard to learn?
The rule is simple but the deductions require careful accounting of which digits must appear in which windows. Easy puzzles are accessible for Sudoku players of all levels. Harder puzzles demand systematic tracking of all outside constraints simultaneously across every border.
What is the best first move in Outside Sudoku?
Find rows or columns where outside clues constrain all three cells in the first window. If three different clues each point to the same window, those three cells are fully determined in terms of which digits they contain (though not necessarily in which order). This is the fastest path to early placements.
How long does Outside 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 can exceed 90 minutes. The key variable is how many outside clues are provided and how tightly they constrain each three-cell window.