---
title: "Find the Mistake Level Up #2: 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 #2: play every level and see each answer."
url: https://sudokuflow.com/puzzles/level-up-2/
language: en
---
[Puzzles](https://sudokuflow.com/puzzles/) / Level Up #2
Level Up
# Level Up #2
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/CNVzGu2NYQI)
## Level 1 · 4×4
Tap the digit you think is wrong.
Level Up #2 · Level 1 · 4×4:
```text
4* 1 | 3* 2
3 2 | 1 4
------+------
. . | 4* 1*
. . | . 2*
```
Digits marked * were filled in by a player; the others were printed with the puzzle.
Show the answer
It's the blue 2 in row 4, column 4. Column 4 already has a printed 2 (row 1, column 4). A printed digit can't be wrong, so the blue one is. The right digit for that cell is 3.
## Level 2 · 6×6
Tap the digit you think is wrong.
Level Up #2 · Level 2 · 6×6:
```text
5 2 6 | . 1 .
4 3* 1 | 2* 6* 5
---------+---------
6* 5* 3 | 5 . .
1 . . | 4* . .
---------+---------
3* 6* . | 1* 4* 2
2 1 4* | . 5 3
```
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 3, column 2. Row 3 already has a printed 5 (row 3, column 4). A printed digit can't be wrong, so the blue one is. The right digit for that cell is 4.
## Level 3 · 9×9
Tap the digit you think is wrong.
Level Up #2 · Level 3 · 9×9:
```text
1 8* 3* | 2 9 7* | 6* 4* 5
2* 9 7 | 4 . . | 1* 8* 3
6 4* 5* | 8* . 1* | 2* 9* 7*
---------+----------+---------
8 . 1 | 6 . . | 7 . 9
. . . | 9* 7 . | . 1 6
9 . . | 1* . 8 | . 2 4
---------+----------+---------
. 1 9 | 7 8 . | . . 2
. 2 4* | 5* 1 . | 9 . 8*
5* 6 8 | 3 6* 9 | 4 7 1
```
Digits marked * were filled in by a player; the others were printed with the puzzle.
Show the answer
It's the blue 6 in row 9, column 5. Row 9 already has a printed 6 (row 9, column 2). A printed digit can't be wrong, so the blue one is. The right digit for that cell is 2.
## 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.