--- title: "Medium Sudoku: Play Free Online, No Ads | Sudoku Flow" description: "Play Medium Sudoku free in your browser, with notes, undo and hints and no ads. Every puzzle has one answer and is graded by the technique it needs." url: https://sudokuflow.com/play/medium/ language: en --- # Medium Sudoku Free Medium Sudoku puzzles to play right here, with no ads and no sign-up. When you finish one, New puzzle gives you the next; your progress stays on this device. ## Medium · #1 Daily Sudoku grid: ```text . 4 5 | . 7 . | . . 2 . 3 . | 1 2 . | 9 . 5 1 . . | . . . | . . 6 ------+-------+------ . 9 . | . . . | 6 2 . . . . | . . 2 | . . 8 8 2 . | 3 6 4 | . 9 . ------+-------+------ . . 9 | 2 . 7 | 8 6 1 . . . | . 3 . | . 5 . 2 1 . | 5 8 . | 3 7 . ```
What does this puzzle need?
## What Medium puzzles ask of you We re-solved all 10,000 Medium puzzles in the app with its hint engine, always taking the easiest step that works. This is the hardest step each one needed: 1. [Hidden Single](https://sudokuflow.com/lessons/hiddenSingle/) 100% [What each Sudoku difficulty level asks of you →](https://sudokuflow.com/data/sudoku-difficulty-levels/) ## How to solve Medium Sudoku What makes a puzzle Medium is the hardest step it needs. Most often that step is Hidden Single (100%). Medium adds the Hidden Single. Pick a number, say 5, and a box that does not have it yet. Cross out the squares whose row or column already holds a 5; when one square is left, the 5 goes there. Go through the numbers one by one. [Learn Hidden Single step by step →](https://sudokuflow.com/lessons/hiddenSingle/) ## Medium Sudoku: questions and answers ### How many numbers do Medium puzzles start with? Every Medium puzzle here starts with 36 of the 81 squares filled in. ### Do Medium puzzles need guessing? No. Every puzzle has exactly one solution, and the hint engine of our app solves each one with logic alone, one technique at a time. ### Can I get a hint while I play? Yes. Hint names the technique the next step needs and shows it on your board one step at a time, with the same hint engine our app uses. ### What comes after Medium? One level up, Hard puzzles are most often decided by Pointing Pair. ## All six levels - [Easy Sudoku](https://sudokuflow.com/play/easy/) Nearly Complete (95%) - **Medium Sudoku** Hidden Single (100%) - [Hard Sudoku](https://sudokuflow.com/play/hard/) Pointing Pair (60%), Naked Pair (18%), Box/Line Reduction (13%), or Hidden Pair (6%) - [Expert Sudoku](https://sudokuflow.com/play/expert/) Skyscraper (55%), Y-Wing (30%), or Empty Rectangle (6%) - [Master Sudoku](https://sudokuflow.com/play/master/) XY-Chain (59%), W-Wing (28%), X-Chain (6%), or XYZ-Wing (5%) - [Extreme Sudoku](https://sudokuflow.com/play/extreme/) ALS-XZ (86%) or Unique Rectangle (12%) ## More Sudoku to play - [Print Medium Sudoku](https://sudokuflow.com/printables/sudoku/medium/) - [Daily Sudoku: four new puzzles every day](https://sudokuflow.com/daily/) - [Sudoku checker](https://sudokuflow.com/tools/sudoku-checker/) - [Sudoku for kids](https://sudokuflow.com/printables/kids/) ![Sudoku app icon](https://sudokuflow.com/assets/app-icon.png) ## Want more boards like this? We also make a Sudoku app for iPhone, iPad, Mac and Android. There are no ads in it at all, it works offline, and when you ask for a hint it shows you the technique instead of just filling in a number. [App Store iPhone, iPad, Mac](https://apps.apple.com/app/apple-store/id6502922368?pt=125379530&ct=sudokuflow_web&mt=8) [Google Play Android](https://play.google.com/store/apps/details?id=com.rubigogames.sudoku&referrer=utm_source%3Dsudokuflow%26utm_medium%3Dweb%26utm_campaign%3Dsite) Sudoku Flow is made by Rubigo Games, the developer of the Sudoku app recommended on this site.