---
title: "Mistake Rush #12: 5 Sudoku Boards, 5 Mistakes | Sudoku Flow"
description: "Five small Sudoku boards, one wrong number in each. Mistake Rush #12: count how many you find, then check every answer."
url: https://sudokuflow.com/puzzles/mistake-rush-12/
language: en
---
[Puzzles](https://sudokuflow.com/puzzles/) / Mistake Rush #12
Mistake Rush
# Mistake Rush #12
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/rw9uqM5nMjY)
## Board 1 · 4×4
Tap the digit you think is wrong.
Mistake Rush #12 · Board 1 · 4×4:
```text
1* . | . 4*
4* . | 1 2
------+------
2 1 | 4* 3*
4 . | 2 .
```
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 2, column 1. Column 1 already has a printed 4 (row 4, column 1). A printed digit can't be wrong, so the blue one is. The right digit for that cell is 3.
## Board 2 · 4×4
Tap the digit you think is wrong.
Mistake Rush #12 · Board 2 · 4×4:
```text
3 . | . 3*
1* 4 | . 2
------+------
2 3 | . 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 3 in row 1, column 4. Row 1 already has a printed 3 (row 1, 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 #12 · Board 3 · 6×6:
```text
5* 4* 2* | . 6 .
3* 6* . | 5* . 4*
---------+---------
1 5 3 | 6 4* .
4 2 . | 5 1 3
---------+---------
. . 4 | 1* 2* 5
2 1* 5 | 4 . .
```
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 4. Column 4 already has a printed 5 (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 4 · 6×6
Tap the digit you think is wrong.
Mistake Rush #12 · Board 4 · 6×6:
```text
4 . 2 | . 1* .
3* 1* 6 | 5 4 2*
---------+---------
2 3* 5 | . . 4*
1 6* 4* | . 3 1*
---------+---------
6 . . | 4 5* .
5 . 1* | 3 2 6
```
Digits marked * were filled in by a player; the others were printed with the puzzle.
Show the answer
It's the blue 1 in row 4, column 6. Row 4 already has a printed 1 (row 4, column 1). 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 #12 · Board 5 · 6×6:
```text
2 3* . | 5* . 6*
. 5 4* | . 2* 3*
---------+---------
4 2 6 | 3 5 1
5 1 . | 6* . 2*
---------+---------
. 4* 5* | . . 6
1* 6 2 | . 3 5
```
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 1, column 6. Column 6 already has a printed 6 (row 5, column 6). 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.