📖 Game Rules
Sudoku is a logic-based number placement puzzle. The objective is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 sub-grids contain all digits from 1 to 9.
Basic Rules:
- Each row must contain the numbers 1-9 with no repetition
- Each column must contain the numbers 1-9 with no repetition
- Each 3×3 box must contain the numbers 1-9 with no repetition
- Some cells are pre-filled and cannot be changed
🎮 How to Play
👆 Select a Cell
Tap any empty cell to select it. The selected cell will be highlighted.
🔢 Enter Numbers
Use the number keyboard at the bottom to fill in your answer.
📝 Notes Mode
Toggle notes mode to add multiple possible numbers to a cell.
↩️ Undo/Clear
Made a mistake? Use undo or clear the cell with the delete button.
🚀 Game Modes
Free Mode
Choose your preferred difficulty and enjoy unlimited puzzles. Perfect for casual play or practice.
Level Mode
Progress through 30 challenging levels, from beginner to expert. Each level increases in difficulty.
Difficulty Levels:
- Easy: 36-46 given numbers, perfect for beginners
- Medium: 27-35 given numbers, balanced challenge
- Hard: 17-26 given numbers, for experienced players
💡 Tips & Strategies
Beginner Tips:
- Start with rows, columns, or boxes that have the most numbers filled
- Look for cells where only one number can fit
- Use the highlight feature to track similar numbers
- Enable "Hide Used Numbers" to see available options
Advanced Strategies:
- Naked Singles: When a cell can only contain one number
- Hidden Singles: When a number can only go in one cell within a unit
- Naked Pairs/Triples: When 2-3 cells in a unit can only contain the same 2-3 numbers
- X-Wing: Advanced technique using rows and columns
⚙️ Settings Guide
Highlight Areas
Highlights the row, column, and 3×3 box of the selected cell.
Highlight Similar
Highlights all cells containing the same number as the selected cell.
Hide Used Numbers
Dims numbers on the keyboard that appear 9 times on the board.
Smart Notes
Automatically removes invalid notes when you place a number.
Timer
Shows elapsed time during gameplay. Can be hidden for relaxed play.
Theme
Choose between light, dark, or system theme.
🏆 Experience System
Earn experience points (XP) by completing puzzles:
- Easy puzzles: 10 XP
- Medium puzzles: 20 XP
- Hard puzzles: 30 XP
- Level mode completion: Bonus XP based on difficulty
- Watch reward ads for extra XP (optional)
Level up to unlock achievements and track your progress!
👑 Premium Features
Remove all advertisements and enjoy an uninterrupted gaming experience. One-time purchase includes:
- No banner ads
- No interstitial ads
- Clean, focused interface
- Support future app development
📖 游戏规则
数独是一种基于逻辑的数字填充游戏。目标是在9×9的网格中填入数字，使每一列、每一行以及九个3×3的子网格都包含1到9的所有数字。
基本规则：
- 每一行必须包含数字1-9，不能重复
- 每一列必须包含数字1-9，不能重复
- 每个3×3宫格必须包含数字1-9，不能重复
- 预填的数字不能更改
🎮 如何游戏
👆 选择格子
点击任意空格进行选择，被选中的格子会高亮显示。
📝 笔记模式
切换笔记模式，可以在格子中添加多个可能的数字。
↩️ 撤销/清除
填错了？使用撤销功能或删除按钮清除格子。
🚀 游戏模式
自由模式
选择您喜欢的难度，享受无限的谜题。适合休闲游戏或练习。
闯关模式
挑战30个精心设计的关卡，从初学者到专家级别，难度逐步提升。
难度等级：
- 简单： 36-46个给定数字，适合初学者
- 中等： 27-35个给定数字，平衡的挑战
- 困难： 17-26个给定数字，适合经验丰富的玩家
💡 技巧与策略
初学者技巧：
- 从填入数字最多的行、列或宫格开始
- 寻找只能填入一个数字的格子
- 使用高亮功能追踪相同的数字
- 启用"隐藏已用数字"查看可用选项
进阶策略：
- 唯一候选数： 当一个格子只能填入一个数字时
- 隐性唯一候选数： 当一个数字在某个单元中只能填入一个格子时
- 数对/三数组： 当一个单元中的2-3个格子只能包含相同的2-3个数字时
- X翼： 使用行和列的高级技巧
⚙️ 设置指南
高亮区域
高亮显示选中格子所在的行、列和3×3宫格。
高亮相同数字
高亮显示与选中格子相同数字的所有格子。
🏆 经验系统
通过完成谜题获得经验值（XP）：
- 简单谜题：10 XP
- 中等谜题：20 XP
- 困难谜题：30 XP
- 闯关模式：基于难度的额外奖励
- 观看奖励广告获得额外XP（可选）
升级解锁成就，追踪您的进步！
👑 高级功能
移除所有广告，享受无干扰的游戏体验。一次性购买包括：
- 无横幅广告
- 无插屏广告
- 清爽专注的界面
- 支持应用的持续开发