Cómo jugar a Sudoku Exterior
Los dígitos fuera de la cuadrícula deben aparecer en las primeras tres celdas de esa fila o columna
Las reglas
Se aplican las reglas estándar del Sudoku: rellena cada fila, columna y caja de 3×3 con los dígitos del 1 al 9, cada uno apareciendo exactamente una vez.
Outside Sudoku coloca dígitos en los márgenes de la cuadrícula. Cada dígito externo debe aparecer en una de las primeras tres celdas (la caja más cercana) de la fila o columna a la que apunta. No se proporcionan dígitos dados estándar dentro de la cuadrícula — todas las pistas provienen de los márgenes. Esto crea una forma inusual de Sudoku donde las restricciones iniciales provienen completamente de fuera de la cuadrícula.
Para saber de dónde viene este puzle, cómo se compara con variantes relacionadas y un resumen de estrategia, consulta nuestro Sudoku Exterior visión general de variantes.
De un Vistazo
Cómo resolver Sudoku Exterior
Preguntas Comunes
¿Qué es 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.