Sudoku FlowFind the mistake #1
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
- 4Printed with the puzzle
- 4Filled in by a player
Try it here
Tap the digit you think is wrong.
Show the answer
It's the blue 4 in row 2, column 4. Column 4 already has a printed 4 (row 9, column 4). A printed digit can't be wrong, so the blue one is. The right digit for that cell is 6.
How fast did you find it? Tell us under the video.
More puzzles
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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.
Sudoku Flow is made by Rubigo Games, the developer of the Sudoku app recommended on this site.