---
title: "Mistake Rush #19: 5 Sudoku Boards, 5 Mistakes | Sudoku Flow"
description: "Five small Sudoku boards, one wrong number in each. Mistake Rush #19: count how many you find, then check every answer."
url: https://sudokuflow.com/puzzles/mistake-rush-19/
language: en
---
[Puzzles](https://sudokuflow.com/puzzles/) / Mistake Rush #19
Mistake Rush
# Mistake Rush #19
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/vdtGydn3cIg)
## Board 1 · 4×4
Tap the digit you think is wrong.
Mistake Rush #19 · Board 1 · 4×4:
```text
4 3* | 1 4*
2 1 | . .
------+------
. 4 | 2* .
3* 2* | 4 .
```
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 4. Row 1 already has a printed 4 (row 1, column 1). 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 #19 · Board 2 · 4×4:
```text
. 2* | 4* 3
4* 3* | 1* .
------+------
. 4 | 2 .
1 2 | 3 .
```
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 2. Column 2 already has a printed 2 (row 4, column 2). 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 #19 · Board 3 · 6×6:
```text
2 . 5 | 1* 3 2*
. . 1* | . 6* .
---------+---------
4* 2 6 | 3* 5 .
. 5* 3* | 4 2* 6
---------+---------
5 1 2 | 6* . 3*
. . 4 | 2 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 1, column 6. Row 1 already has a printed 2 (row 1, 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 #19 · Board 4 · 6×6:
```text
2 6 5 | . . 4*
1 . 3 | . 2* 6
---------+---------
4* 3* 1 | . . .
5* 2 6* | . 4* 1*
---------+---------
6* 5* . | . 1 3*
3 1 4 | 6 2 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 2, column 5. Column 5 already has a printed 2 (row 6, column 5). 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 #19 · Board 5 · 6×6:
```text
6* . . | 5 6 4*
. . . | 3 2 1*
---------+---------
3* 1 . | 4 5 2
2 5 4* | . 1 3
---------+---------
. 2 3* | 1* . 6
4* 6* 1* | 2 . 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 1. Row 1 already has a printed 6 (row 1, column 5). A printed digit can't be wrong, so the blue one is. The right digit for that cell is 1.
## 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.