数独
经典9×9数独游戏，有简单、中等、困难和专家难度 — 冲突高亮、铅笔注记和提示功能
Sudoku
Fill the 9×9 grid so every row, column and 3×3 box contains digits 1–9.
Sudoku Online — Free Puzzle Game
Classic 9×9 Sudoku with Easy, Medium, Hard, and Expert difficulties. Conflict highlighting, pencil notes, hints, and a built-in timer. New puzzle every time.
FAQ
How do you play Sudoku?
Fill a 9×9 grid so every row, column, and 3×3 box contains the digits 1–9 exactly once. No math required — only logic.
What are pencil marks in Sudoku?
Small candidate numbers you write in cells to track possibilities. Eliminating candidates is the core of advanced Sudoku solving.
What is the fastest Sudoku solving technique?
Start with 'naked singles' (cells with only one possible candidate). Then find 'hidden singles' (a digit that can only go in one cell within a row/column/box).
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