A sudoku puzzle can be very easy, extremely hard, or somewhere in between, depending on the techniques required to solve it. This page estimates the difficulty level of a given puzzle based on the difficulty of the strategies that must be used to solve it. Enter a puzzle string below (see the main sudoku page and look above the puzzle for an example) and click Grade Puzzle to find out the estimated difficulty level.

### Sudoku Difficulty Estimator

You submitted ...19.....4...3.....1..47........6.8.98....7....2.........79.1...4.1..5.6.35..4..

Estimated Difficulty Level: **Moderate** (Difficulty Score: 3 out of 6)

Enter a sudoku string (see example):