---
title: "Find the Mistake Level Up #8: 3 Sudoku Levels | Sudoku Flow"
description: "Three Sudoku boards, one wrong number in each: a 4×4, a 6×6, then a full 9×9. Level Up #8: play every level and see each answer."
url: https://sudokuflow.com/puzzles/level-up-8/
language: en
---
[Puzzles](https://sudokuflow.com/puzzles/) / Level Up #8
Level Up
# Level Up #8
Three boards, each with one wrong number, from a small 4×4 to a full 9×9. Play every level here, at your own pace.
[Watch on YouTube](https://youtube.com/shorts/-IUPPKjsZOE)
## Level 1 · 4×4
Tap the digit you think is wrong.
Level Up #8 · Level 1 · 4×4:
```text
3* . | 4* 1
. 4* | 2 3
------+------
4* 1 | . 2*
3 2 | . .
```
Digits marked * were filled in by a player; the others were printed with the puzzle.
Show the answer
It's the blue 3 in row 1, column 1. Column 1 already has a printed 3 (row 4, column 1). A printed digit can't be wrong, so the blue one is. The right digit for that cell is 2.
## Level 2 · 6×6
Tap the digit you think is wrong.
Level Up #8 · Level 2 · 6×6:
```text
5* 4 1 | 6* 2* 3
. . 6 | 4 . .
---------+---------
6 . 4* | . . 1*
3* 5* 2 | 3 6* .
---------+---------
2 . 3* | . 4 6
4 6* 5 | 1 3* 2
```
Digits marked * were filled in by a player; the others were printed with the puzzle.
Show the answer
It's the blue 3 in row 4, column 1. Row 4 already has a printed 3 (row 4, column 4). A printed digit can't be wrong, so the blue one is. The right digit for that cell is 1.
## Level 3 · 9×9
Tap the digit you think is wrong.
Level Up #8 · Level 3 · 9×9:
```text
4* 2 7* | 3 8* 6 | . . .
3* 8* 6* | 5 1 9* | 5* 2* 7*
5 1 9 | 4 2* 7* | 3 . .
---------+----------+---------
. 7* 5* | 8* 4 3 | . . 1
8* 6 1 | 2 9* 5* | 7 4 .
. 4 3 | 7* 6* 1 | . . .
---------+----------+---------
. 3 4 | 1* . 8 | 9 . 2
. 5* 8 | 9 . 2 | . . 4
1 9 2 | 6 . 4 | . 7 .
```
Digits marked * were filled in by a player; the others were printed with the puzzle.
Show the answer
It's the blue 5 in row 2, column 7. Row 2 already has a printed 5 (row 2, column 4). A printed digit can't be wrong, so the blue one is. The right digit for that cell is 4.
## 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.