---
title: "Mistake Rush #9: 5 Sudoku Boards, 5 Mistakes | Sudoku Flow"
description: "Five small Sudoku boards, one wrong number in each. Mistake Rush #9: count how many you find, then check every answer."
url: https://sudokuflow.com/puzzles/mistake-rush-9/
language: en
---
[Puzzles](https://sudokuflow.com/puzzles/) / Mistake Rush #9
Mistake Rush
# Mistake Rush #9
Five small boards, one wrong number in each. In the video you get a few seconds per board; here you can take your time.
[Watch on YouTube](https://youtube.com/shorts/SnRVuc6utIU)
## Board 1 · 4×4
Tap the digit you think is wrong.
Mistake Rush #9 · Board 1 · 4×4:
```text
4* 3* | . 1
1 . | 4 3*
------+------
. 4 | . 4*
2* 1 | 3 .
```
Digits marked * were filled in by a player; the others were printed with the puzzle.
Show the answer
It's the blue 4 in row 3, column 4. Row 3 already has a printed 4 (row 3, column 2). A printed digit can't be wrong, so the blue one is. The right digit for that cell is 2.
## Board 2 · 4×4
Tap the digit you think is wrong.
Mistake Rush #9 · Board 2 · 4×4:
```text
. . | 4* 2
. 2 | 3 .
------+------
3 4* | 2* .
2 1* | 4 3*
```
Digits marked * were filled in by a player; the others were printed with the puzzle.
Show the answer
It's the blue 4 in row 1, column 3. Column 3 already has a printed 4 (row 4, column 3). A printed digit can't be wrong, so the blue one is. The right digit for that cell is 1.
## Board 3 · 6×6
Tap the digit you think is wrong.
Mistake Rush #9 · Board 3 · 6×6:
```text
2 . 3 | . 1 6
. 1* . | . 5* 2*
---------+---------
1 3 5 | 2* 6* .
4 2* 6 | 1 . .
---------+---------
5* 4* 2* | 6 2 .
3* 6* . | 5 4 1
```
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 5, column 3. Row 5 already has a printed 2 (row 5, column 5). A printed digit can't be wrong, so the blue one is. The right digit for that cell is 1.
## Board 4 · 6×6
Tap the digit you think is wrong.
Mistake Rush #9 · Board 4 · 6×6:
```text
. 1 . | 6 . 3
6 3* 4* | 5* 1 2
---------+---------
2 5 6 | 4* 3 .
1* . . | 2* . 6*
---------+---------
. 2 5* | 4 . 1
. 6* 1 | 3 2* 5*
```
Digits marked * were filled in by a player; the others were printed with the puzzle.
Show the answer
It's the blue 4 in row 3, column 4. Column 4 already has a printed 4 (row 5, column 4). A printed digit can't be wrong, so the blue one is. The right digit for that cell is 1.
## Board 5 · 6×6
Tap the digit you think is wrong.
Mistake Rush #9 · Board 5 · 6×6:
```text
. 5* 4 | 1 . 2
. 3 . | 5* 3* 6
---------+---------
5 6 . | 2* 1* 4*
4* 2 1 | . 6* 5
---------+---------
2 1* . | 4 5 3
3* 4 5* | . . .
```
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 2, column 5. Row 2 already has a printed 3 (row 2, column 2). 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.