---
title: "Mistake Rush #13: 5 Sudoku Boards, 5 Mistakes | Sudoku Flow"
description: "Five small Sudoku boards, one wrong number in each. Mistake Rush #13: count how many you find, then check every answer."
url: https://sudokuflow.com/puzzles/mistake-rush-13/
language: en
---
[Puzzles](https://sudokuflow.com/puzzles/) / Mistake Rush #13
Mistake Rush
# Mistake Rush #13
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/xw38ejzKQNM)
## Board 1 · 4×4
Tap the digit you think is wrong.
Mistake Rush #13 · Board 1 · 4×4:
```text
4* 2* | 1 3*
1* . | 4 2
------+------
3 1* | . 1
2 . | . .
```
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 3, column 2. Row 3 already has a printed 1 (row 3, column 4). A printed digit can't be wrong, so the blue one is. The right digit for that cell is 4.
## Board 2 · 4×4
Tap the digit you think is wrong.
Mistake Rush #13 · Board 2 · 4×4:
```text
4 1* | . 2*
3* . | 1* .
------+------
1 4 | . 2
2 . | 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 1, column 4. Column 4 already has a printed 2 (row 3, column 4). A printed digit can't be wrong, so the blue one is. The right digit for that cell is 3.
## Board 3 · 6×6
Tap the digit you think is wrong.
Mistake Rush #13 · Board 3 · 6×6:
```text
. 5 . | 6 4 .
. . 3 | 2* . 1
---------+---------
4 1* 6 | . . 2
3 2* 5 | 1* . 3*
---------+---------
5 3* 1 | 4 2 6*
. 6* 4 | 3* 1* 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 4, column 6. Row 4 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 4.
## Board 4 · 6×6
Tap the digit you think is wrong.
Mistake Rush #13 · Board 4 · 6×6:
```text
3* . 2 | . . 4
1* 6 4* | 5 2 .
---------+---------
4 1* . | 3 6 .
6 2* 3* | 1* 4 5
---------+---------
. . 1* | . 3* 6*
2 6* . | 4 5 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 6, column 2. Column 2 already has a printed 6 (row 2, column 2). A printed digit can't be wrong, so the blue one is. The right digit for that cell is 3.
## Board 5 · 6×6
Tap the digit you think is wrong.
Mistake Rush #13 · Board 5 · 6×6:
```text
1 . 4 | 6 . .
3* 2* 6 | 5 1 4*
---------+---------
5* 4* 2 | 3 . .
6 3* 1 | . . 1*
---------+---------
4* 6* 5* | . 3 2
2* 1 3 | . 5 .
```
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 3). A printed digit can't be wrong, so the blue one is. The right digit for that cell is 5.
## 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.