--- title: "Find the Mistake Sudoku #27 | Sudoku Flow" description: "Sudoku puzzle #27: a half-finished board with 58 digits, 32 of them filled in by a player, and one of those is wrong. Find it in five seconds, then check the answer." url: https://sudokuflow.com/puzzles/find-the-mistake-27/ language: en --- [Puzzles](https://sudokuflow.com/puzzles/) / Find the mistake #27 [Find the mistake](https://sudokuflow.com/find-the-mistake/) # Find the mistake #27 One digit on this board breaks the rules. The game is half finished: some digits were printed with the puzzle, the others were filled in by a player. Give yourself five seconds before the video shows it. ## Reading the board ## Where to start This board has 58 digits and 32 of them are blue, so those 32 are the only suspects. The most crowded line is column 1, with 9 digits: a good place to start. [How to find a mistake in Sudoku →](https://sudokuflow.com/guides/find-a-mistake/) ## Try it here Tap the digit you think is wrong. Sudoku board for Find the mistake #27: ```text 2* . 9 | 6 . 4 | 3 7* 8* 7* . . | . 2* 8* | 1 9* 4* 4 . 8* | . 3 9 | 2* 6* 5 ---------+----------+--------- 1 2* 6* | . . 5 | 4* 3 7 9* . . | 2 . 1 | 5* 8* 6* 5* 8 . | . . 3* | 9 2* 1* ---------+----------+--------- 3 9 . | . . 6* | 7 5 2* 7 6 . | 3 . 2* | 8* 4 9* 8* . 2 | . . 7* | 6* 1* 3* ``` Digits marked * were filled in by a player; the others were printed with the puzzle.
Show the answer It's the blue 7 in row 2, column 1. Column 1 already has a printed 7 (row 8, column 1). A printed digit can't be wrong, so the blue one is. The right digit for that cell is 6.
Video transcript **On screen:** One number is wrong. / How fast did you find it? **Voice:** One number is wrong! Three! Two! One! Right there! How fast did you find it?
How fast did you find it? Tell us under the video. [Watch on YouTube](https://youtube.com/shorts/xqOsB4EkZcI)
Embed this puzzle Copy this code to show the puzzle on your own site or blog. It links back here.
## More puzzles [![Find the mistake #28](https://sudokuflow.com/media/puzzles/find-the-mistake-28-en.jpg?v=a0120ac01d)](https://sudokuflow.com/puzzles/find-the-mistake-28/): Find the mistake #28 11 s video [![Find the mistake #26](https://sudokuflow.com/media/puzzles/find-the-mistake-26-en.jpg?v=6a981a11e3)](https://sudokuflow.com/puzzles/find-the-mistake-26/): Find the mistake #26 11 s video [![Find the mistake #25](https://sudokuflow.com/media/puzzles/find-the-mistake-25-en.jpg?v=ce623fdd25)](https://sudokuflow.com/puzzles/find-the-mistake-25/): Find the mistake #25 11 s video [![Find the mistake #24](https://sudokuflow.com/media/puzzles/find-the-mistake-24-en.jpg?v=584488d239)](https://sudokuflow.com/puzzles/find-the-mistake-24/): Find the mistake #24 11 s video ![Sudoku app icon](https://sudokuflow.com/assets/app-icon.png) ## 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.