---
title: "Mistake Rush #4: 5 Sudoku Boards, 5 Mistakes | Sudoku Flow"
description: "Five small Sudoku boards, one wrong number in each. Mistake Rush #4: count how many you find, then check every answer."
url: https://sudokuflow.com/puzzles/mistake-rush-4/
language: en
---
[Puzzles](https://sudokuflow.com/puzzles/) / Mistake Rush #4
Mistake Rush
# Mistake Rush #4
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/1kNwnCu5e0I)
## Board 1 · 4×4
Tap the digit you think is wrong.
Mistake Rush #4 · Board 1 · 4×4:
```text
3* . | . 4
. . | . 3*
------+------
2* 3 | 4 1
1* 4* | 2 3
```
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 4. Column 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 2.
## Board 2 · 4×4
Tap the digit you think is wrong.
Mistake Rush #4 · Board 2 · 4×4:
```text
. 4 | 2 1
2 1* | . 4*
------+------
4 3 | 4* 2*
. . | . 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 3. Row 3 already has a printed 4 (row 3, column 1). 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 #4 · Board 3 · 6×6:
```text
4 . 3* | 2* 5* .
. 5* 1 | 3 4* 6
---------+---------
5* . 2 | . 6 .
1 . 3 | 4* 2* 5*
---------+---------
6 1 . | . . 2
3 2* 5 | 6* 1 4
```
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 3. Column 3 already has a printed 3 (row 4, column 3). A printed digit can't be wrong, so the blue one is. The right digit for that cell is 6.
## Board 4 · 6×6
Tap the digit you think is wrong.
Mistake Rush #4 · Board 4 · 6×6:
```text
3* . 4 | 6* 2 5
. 5 6* | . . .
---------+---------
1 . 3* | 5* 6 4
4* 6 2* | 3 1 2
---------+---------
5 3* 1* | 2 4 .
. 4* . | 1* 5 .
```
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 3. Row 4 already has a printed 2 (row 4, column 6). A printed digit can't be wrong, so the blue one is. The right digit for that cell is 5.
## Board 5 · 6×6
Tap the digit you think is wrong.
Mistake Rush #4 · Board 5 · 6×6:
```text
1 3 2 | 4 6 5
6* 4 . | . 2 .
---------+---------
. 6* . | . . 4
5* 1* 4 | 2* 3 .
---------+---------
4* 2* 1 | . 5* 6*
3* 5 6 | 2 . 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 4, column 4. Column 4 already has a printed 2 (row 6, column 4). A printed digit can't be wrong, so the blue one is. The right digit for that cell is 6.
## 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.