Sudoku Difficulty Levels Explained

Whether beginner or pro, Sudoku offers the right level for everyone. The difficulty of a puzzle does not depend on the size of the grid, but on the number and position of the given numbers. Learn what defines each level.

Easy Sudokus for Getting Started

Easy Sudokus have many given numbers. They can usually be solved with simple strategies without having to take notes. They are ideal for beginners to learn the rules and get a feel for the game.

Medium Sudokus for Advanced Players

In medium Sudokus, fewer numbers are given. Here, the simplest strategies are often no longer sufficient. You have to look more closely and occasionally take notes to narrow down possible candidates for a cell.

Hard Sudokus for Experts

Hard Sudokus require advanced solving techniques. Often there are only a few obvious steps, and you have to plan several moves ahead. Noting candidates is essential here to keep track of things.

Extreme Sudokus for Professionals

Extreme Sudokus are a real challenge. They require complex logical deductions and special techniques like X-Wing or Swordfish. Solving them can take a lot of time and patience, but rewards you with a great sense of achievement.

How is the Difficulty Determined?

The difficulty is usually determined by computer programs. These check which logical techniques are necessary to solve the puzzle. The more complex the required techniques, the higher the difficulty level is rated.

Find Your Level

Choose a difficulty level and start your next Sudoku adventure.

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Frequently asked questions

How many numbers are given in an easy Sudoku?

There is no fixed rule, but usually it is between 30 and 40 numbers. However, the position of the numbers is more important than the quantity.

Should I always start with easy Sudokus?

If you do not know the rules yet, this is recommended. Once you feel confident, you can venture into harder puzzles.

Why do I often get stuck on hard Sudokus?

Hard Sudokus require special solving techniques. If you do not know these, you will not be able to progress past a certain point.

Are there unsolvable Sudokus?

A correctly created Sudoku always has exactly one unique solution and can be solved by pure logic, without having to guess.