Learn Sudoku

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You don't need a maths degree to be good at Sudoku — you need a handful of patterns and a little patience. These guides build them up in order.

If you've never finished a grid before, start with the rules. If you can solve easy puzzles but stall on the hard ones, jump straight to the techniques. Everything is written to be read once and remembered, not memorised like a formula sheet.

• How to Play Sudoku — The rules of classic 9×9, explained without the jargon.
• Killer Sudoku Rules — No starting numbers — just cages, sums, and a bit of arithmetic.
• Solving Techniques — Singles, pairs, pointing pairs — the toolkit that cracks most puzzles.

学习数独

玩好数独不需要数学学位——需要的是几种固定套路，外加一点耐心。下面的教程就是按顺序把这些套路搭起来。

要是你从没填完过一整盘，先从规则看起；要是简单题没问题、一到难题就卡住，那就直接跳到技巧。所有内容都尽量写成「读一遍就记住」，而不是像公式表那样硬背。

• 数独怎么玩 —— 经典 9×9 的规则，不堆术语，讲清楚。
• Killer 数独规则 —— 没有初始数字——只有笼、和，以及一点点算术。
• 解题技巧 —— 唯一数、数对、区块——能搞定大多数题的工具箱。